Genie GS-3246 Service manual

®

Technical

Publications

GS-2046

GS-2646

GS-3246

Manual

(before serial number 17408)

First Edition, Third Printing

Rev C1

Part No. 48339

Introduction Service Manual - First Edition ii

GS-2046

GS-2646

GS-3246

Important

Read, understand and obey the safety rules and operating instructions in the

Genie GS-2032 &

Genie GS-2046 & Genie GS-2646 & Genie

GS-3246 Operator's Manual before attempting any maintenance or repair procedure.

This manual provides detailed scheduled maintenance information for the machine owner and user. It also provides troubleshooting and repair procedures for qualified service professionals.

Basic mechanical, hydraulic and electrical skills are required to perform most procedures.

However, several procedures require specialized skills, tools, lifting equipment and a suitable workshop. In these instances, we strongly recommend that maintenance and repair be performed at an authorized Genie dealer service center.

Genie Industries has endeavored to deliver the highest degree of accuracy possible. However, continuous improvement of our products is a

Genie policy. Therefore, product specifications are subject to change without notice.

Readers are encouraged to notify Genie of errors and send in suggestions for improvement. All communications will be carefully considered for future printings of this and other manuals. Please write to the technical publications team in care of

Genie Industries, PO Box 97030, Redmond WA

98073-9730 USA.

If you have any questions, please call Genie

Industries.

Genie North America

Telephone (425) 881-1800

Toll Free 800 536-1800 in U.S.A.

Toll Free 800 426-8089 in Canada

Fax (425) 882-9260 http://www.genielift.com

E-mail: [email protected]

Genie Europe

Telephone (44) 01636-605030

Fax (44) 01636-611090 http://www.genielift.com

E-mail: [email protected]

®

Copyright © 1997 by Genie Industries

First Edition: First Printing, December 1997

Second Printing, April 1999

Third Printing,October 1999

"Genie" is a Registered Trademark of Genie Industries in the USA and many other countries. "GS" is a Trademark of

Genie Industries.

Printed on recycled paper

Printed in U.S.A.

Genie GS-2046 & Genie GS-2646 & Genie GS-3246 Part No. 48339

Service Manual - First Edition

Safety Rules

Danger

Failure to obey the instructions and safety rules in this manual and the Genie GS-2032 & Genie

GS-2046 & Genie GS-2646 & Genie GS-3246

Operator's Manual will result in death or serious injury.

Many of the hazards identified in the operator’s manual are also safety hazards when maintenance and repair procedures are performed.

Do Not Perform Maintenance

Unless:

You are trained and qualified to perform maintenance on this machine.

You read, understand and obey:

- manufacturer’s instructions and safety rules

- employer’s safety rules and worksite regulations

- applicable governmental regulations

You have the appropriate tools, lifting equipment and a suitable workshop.

Part No. 48339 Genie GS-2046 & Genie GS-2646 & Genie GS-3246 iii


SAFETY RULES

Personal Safety

Any person working on or around a machine must be aware of all known safety hazards. Personal safety and the continued safe operation of the machine should be your top priority.

Read each procedure thoroughly. This manual and the decals on the machine use signal words to identify the following:

Safety alert symbol—used to alert personnel to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

Red—used to indicate the presence of an imminently hazardous situation which, if not avoided, will result in death or serious injury.

Orange—used to indicate the presence of a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Yellow with safety alert symbol— used to indicate the presence of a potentially hazardous situation which, if not avoided, may cause minor or moderate injury.

Yellow without safety alert symbol—used to indicate the presence of a potentially hazardous situation which, if not avoided, may result in property damage.

Green—used to indicate operation or maintenance information.

Be sure to wear protective eye wear and other protective clothing if the situation warrants it.

unsecured components when lifting or placing loads. Always wear approved steel-toed shoes.

Be aware of potential crushing hazards such as moving parts, free swinging or

Workplace Safety

Be sure to keep sparks, flames and lighted tobacco away from flammable and combustible materials like battery gases and engine fuels. Always have an approved fire extinguisher within easy reach.

Be sure that all tools and working areas are properly maintained and ready for use. Keep work surfaces clean and free of debris that could get into machine components and cause damage.

Be sure that your workshop or work area is properly ventilated and well lit.

Be sure any forklift, overhead crane or other lifting or supporting device is fully capable of supporting and stabilizing the weight to be lifted. Use only chains or straps that are in good condition and of ample capacity.

Be sure that fasteners intended for one time use (i.e., cotter pins and self-locking nuts) are not reused. These components may fail if they are used a second time.

iv

Be sure to properly dispose of old oil or other fluids. Use an approved container.

Please be environmentally safe.



Theory of Operation

Power Source

The Genie GS-2046 & Genie GS-2646 & Genie

GS-3246 machines are powered by four six-volt

(225 AH) batteries. The four batteries are wired in series to produce 24 volts.

Hydraulic System

All machine functions are performed by the hydraulic system. The hydraulic system is powered by a single-section gear pump. When the pump is activated, it supplies hydraulic fluid under pressure to the function manifold, where the control valves are located. To protect from overpressurization of the hydraulic system, the pump is provided with a pressure relief valve.

Activating a machine function is accomplished by actuating or moving a switch and/or control handle, which sends voltage to the ECM. The

ECM then sends the signal to the appropriate directional control valve. The directional valve determines which direction the hydraulic fluid will travel. Computer software determines the volume of fluid in relation to the proportional valve input voltage.

Electrical System

Limit switches are found in various locations on the machine. The function of a limit switch is to communicate the operating position of the machine to the ECM (Electronic Control Module).

When a change in signal is received from a limit switch, the ECM responds by limiting the drive speed to 0.5 miles per hour (0.8 km/h), according to the default settings in the ECM software.

Machine Controls

The GS-2046 & GS-2646 & GS-3246 machines are equipped with operational controls which are found in two locations: the ground controls, located on the hydraulic tank side of the machine, and the platform controls, located in the platform.

All lift and drive functions are available at the platform controls. Only platform up/down functions are available at the ground controls.

The ECM uses input from the ground or platform controls to activate the various machine functions.

The ECM has predetermined settings for the various machine functions.

The joystick is fitted with a 5000 ohm potentiometer. With the joystick in the neutral position, the potentiometer will measure 2730 ohms. These signals are sent to the multiplex card, then down to the ECM to control the voltage supplied to the proportional valve. Two microswitches mounted on the joystick tell the

ECM the drive direction desired. A thumb rocker switch on the top of the joystick is used for steering.

Mounted on the platform control box lid of machines before serial number 17408 are buttons and a switch that, when activated, sends a signal to the ECM through the multiplex card. On machines after serial number 17407, the platform control box lid has a decal/membrane pad. This is a touch-activated pad incorporating wiring, switches and LEDs that are resistant to the environment. Activating any of the buttons on the

Part No. 48339 Genie GS-2046 & Genie GS-2646 & Genie GS-3246 v

THEORY OF OPERATION pad will send a signal to the ECM through the multiplex card.

A diagnostic display is located at the battery pack side of the machine to aid in troubleshooting. If the machine malfunctions, a fault code will be shown in the display window.

Washing electronic components is not suggested.

Instead, use compressed air to remove debris from these components.

Component damage hazard.

Avoid shock or impact to the

ECM. Internal damage may not be visible from the outside.

Service Manual - First Edition vi



Table of Contents

Introduction

Section One

Important Information .....................................................................................................

ii

Safety Rules

General Safety Rules ....................................................................................................

iii

Section Two Specifications

Machine Specifications, GS-2046 ............................................................................ 2 - 1



Performance Specifications, All Models ................................................................... 2 - 4

Hydraulic Specifications, All Models ......................................................................... 2 - 4

Hydraulic Hose and Fitting Torque Specifications .................................................... 2 - 5

Section Three Scheduled Maintenance Inspections

Introduction ............................................................................................................... 3 - 1

Table A ..................................................................................................................... 3 - 2

Table B ..................................................................................................................... 3 - 2

Table C ..................................................................................................................... 3 - 3

Table D ..................................................................................................................... 3 - 3

Maintenance Inspection Report ................................................................................ 3 - 4

Section Four Scheduled Maintenance Procedures

Introduction ............................................................................................................... 4 - 1

A-1 Inspect the Operator’s and Safety Manuals .................................................... 4 - 2

A-2 Inspect the Decals and Placards .................................................................... 4 - 2

A-3 Inspect for Damage, and Loose or Missing Parts ........................................... 4 - 3

A-4 Check the Hydraulic Oil Level ......................................................................... 4 - 4

A-5 Check for Hydraulic Leaks .............................................................................. 4 - 4 vii

Part No. 48339 Genie GS-2046 & Genie GS-2646 & Genie GS-3246


TABLE OF CONTENTS

Section Four

Scheduled Maintenance Procedures, continued

A-6 Test the Platform and Ground Controls .......................................................... 4 - 5

A-7 Test the Manual Platform Lowering Operation ............................................... 4 - 6

A-8 Test the Tilt Sensor ........................................................................................ 4 - 6

A-9 Test the Pothole Guards ................................................................................. 4 - 7

A-10 Test the Lift/Drive Select Switch ..................................................................... 4 - 7

A-11 Perform 30 Day Service .................................................................................. 4 - 8

B-1 Check the Batteries ........................................................................................ 4 - 9

B-2 Inspect the Electrical Wiring .......................................................................... 4 - 10

B-3 Inspect the Tires and Wheels (including castle nut torque) ............................ 4 - 11

B-4 Test the Key Switch ...................................................................................... 4 - 11

B-5 Test the Emergency Stop Buttons ................................................................. 4 - 12

B-6 Test the Service Horn .................................................................................... 4 - 12

B-7 Test the Drive Brakes .................................................................................... 4 - 13

B-8 Test the Drive Speed - Stowed Position ........................................................ 4 - 15

B-9 Test the Drive Speed - Raised Position ......................................................... 4 - 15

B-10 Perform Hydraulic Oil Analysis ...................................................................... 4 - 16

B-11 Check the Electrical Contactor ...................................................................... 4 - 16

B-12 Replace the Hydraulic Return Filter ............................................................... 4 - 17

C-1 Check the Module Tray Latch Components ................................................... 4 - 18

D-1 Test or Replace the Hydraulic Oil .................................................................. 4 - 19 viii



TABLE OF CONTENTS

6

7

8

9

10

11

12

13

14

4

5

1

2

3

Section Five

Chart

Number

Troubleshooting Flow Charts and Fault Codes

Chart Title Page

Fault Code Chart (Before Serial Number 17408) ..................................................... 5 - 3

Normal Operation Code Chart (Before Serial Number 17408) ................................. 5 - 6

Fault Code Chart (After Serial Number 17407) ........................................................ 5 - 8

All Functions Will Not Operate ................................................................................. 5 - 9

Pump Motor Will Not Operate ................................................................................ 5 - 12

Pump Motor Will Not Operate

After serial number 6900 ........................................................................................ 5 - 14

All Functions Inoperative, Power Unit Starts and Runs

(No applicable code) ............................................................................................... 5 - 16

Ground Controls Inoperative, Platform Controls Operate Normally


Platform Controls Inoperative, Ground Controls Operate Normally


Platform Up Function Inoperative ........................................................................... 5 - 20

Platform Down Function Inoperative

GS-2046 & GS-2646 Models .................................................................................. 5 - 21

Platform Down Function Inoperative

GS-3246 Models .................................................................................................... 5 - 23

Steer Left Function Inoperative .............................................................................. 5 - 25

Steer Right Function Inoperative ............................................................................ 5 - 27

All Drive Functions Inoperative, All Other Functions Operate Normally ................. 5 - 29

Brake Release Function Inoperative ...................................................................... 5 - 31

Drive Forward Function Inoperatmive .................................................................... 5 - 32

Part No. 48339 Genie GS-2046 & Genie GS-2646 & Genie GS-3246 ix


TABLE OF CONTENTS

19

20

Section Five

15

16

17

18

21

Section Six

Troubleshooting Flow Charts and Fault Codes, continued

Drive Reverse Function Inoperative ....................................................................... 5 - 33

Machine Will Not Drive At Full Speed ..................................................................... 5 - 34

Machine Drives At Full Speed With Platform Raised ............................................. 5 - 36

Manual Platform Lowering Function Inoperative

GS-2046 & GS-2646 (No applicable code) ............................................................ 5 - 37

Manual Platform Lowering Function Inoperative

GS-3246 (No applicable code) ............................................................................... 5 - 38

Drive Function Overspeeds While Driving Down an Incline

GS-3246 Models (No applicable code) ................................................................... 5 - 39

Drive Function Hesitates While Steering

GS-3246 Models (No applicable code) ................................................................... 5 - 40

Schematics

Introduction ............................................................................................................... 6 - 1

Electrical Components .............................................................................................. 6 - 2

Module Tray Legend (Before serial number 6901) ................................................... 6 - 4

Module Tray Legend (After serial number 6900) ...................................................... 6 - 5

Electrical Symbols Legend ....................................................................................... 6 - 6

Electrical Schematic (Before serial number 6901) .................................................... 6 - 7

Electrical Schematic (From serial number 6901 to 8931) ......................................... 6 - 9

Electrical Schematic (From serial number 8932 to 17407) ..................................... 6 - 11

Electrical Schematic (After serial number 17407) ................................................... 6 - 13

Ground Controls and Level Sensor Box Legend .................................................... 6 - 15

Platform Controls Legend (Before serial number 17408) ....................................... 6 - 16

Platform Controls Legend (After serial number 17407) .......................................... 6 - 17

Hydraulic Symbols Legend ..................................................................................... 6 - 18

Hydraulic Schematic (Before serial number 17482) ............................................... 6 - 19

Hydraulic Schematic (After serial number 17481) .................................................. 6 - 20 x



TABLE OF CONTENTS

Section Seven Repair Procedures

Introduction ............................................................................................................... 7 - 1

Platform Controls

1-1 Joystick Controller .......................................................................................... 7 - 2

1-2 Software Configuration ................................................................................... 7 - 3

1-3 How to Set the Dip Switch Codes .................................................................. 7 - 4

1-4 Toggle Switches ............................................................................................. 7 - 6

Platform Components

2-1 Platform .......................................................................................................... 7 - 7

2-2 Platform Extension .......................................................................................... 7 - 8

Scissor Components

3-1 Scissor Assembly, GS-2046 ......................................................................... 7 - 11



3-4 Lift Cylinder ................................................................................................... 7 - 32

Ground Controls

4-1 Manual Platform Lowering Cable, GS-2046 & GS-2646 ............................... 7 - 35

4-2 Manual Platfrom Lowering, GS-3246 ............................................................ 7 - 36

4-3 Toggle Switches, See 1-2,

Toggle Switches ................................................. 7 - 36

Hydraulic Pump

5-1 Hydraulic Pump ............................................................................................ 7 - 36

Manifolds

6-1 Function Manifold Components (Before serial number 11501) ..................... 7 - 38

6-2 Function Manifold Components (After serial number 11500) ........................ 7 - 40

6-3 Valve Adjustments - Function Manifold ......................................................... 7 - 42

6-4 Valve Adjustments - Lift Relief Valve, GS-3246 ........................................... 7 - 44

6-5 Valve Adjustments - Back Pressure Relief Valve ......................................... 7 - 45

Part No. 48339 Genie GS-2046 & Genie GS-2646 & Genie GS-3246 xi


Section Seven

Repair Procedures, continued

Steering Axle Components

7-1 Yoke and Drive Motor ................................................................................... 7 - 46

7-2 Steering Cylinder .......................................................................................... 7 - 48

7-3 Steering Bellcrank ......................................................................................... 7 - 48

Non-steering Axle Components

8-1 Drive Brake ................................................................................................... 7 - 49

Brake Release Hand Pump Components

9-1 Brake Release Hand Pump .......................................................................... 7 - 50 xii


Service Manual - First Edition Section 2 - Specifications

Specifications

Machine Specifications -

GS-2046

Stowed dimensions

Length

Length, platform extended

Width

96 in 243.8 cm

135

1

/

2

in 344.1 cm

46 in 116.8 cm

Models with sliding rails

Height, stowed maximun

Rails up - ANSI & CSA

Height, stowed maximum

Rails up - CE

78

82

1

7

/

/

2

8

in

in

199.4 cm

210.4 cm


Rails lowered


Rails removed

71

39

3

1

/

/

4

4

in

in

182.25 cm

99.7 cm

Height, guard rails - ANSI & CSA

Height, guard rails - CE

39 in 99.1 cm

42

1

/

2

in 110.2 cm

Models with folding rails

Height, stowed maximum 86

1

/

8

in

64

3

/

4

in

219 cm

164 cm Height stowed maximum

Rails folded

Platform height,

Stowed maximum

42

3

/

8

in 107.6 cm

Operational dimensions

Maximum platform height 26 ft

Maximum platform working height 20 ft

Maximum platform extension

Wheelbase

Turning radius, outside

Turning radius, inside

72

39 in

7

/

8

in

7.9 m

6.1 m

99 cm

185.1 cm

91

3

/

4

in 233.1 cm

0 in 0 cm

Platform dimensions

Length

Width

Extension length

89 in

45

3

/

4

in

39 in

1200 lbs

226 cm

116 cm

99 cm

544 kg Maximum load capacity

All Models

Weight

Ground clearance

4324 lbs

4 in

7

/

8

in

1961 kg

10.2 cm

2.2 cm Pothole guards deployed

Tires and wheels

Tire size (solid rubber)

Load range

Tire contact area

Overall tire diameter

Wheel diameter

15 x 5 x 11

1

/

4

in

38.1 x 12.7 x 28.6 cm

2,400 lbs 1,089 kg

9 sq in 58 sq cm

38.1 cm 15 in

11

1

/

4

in 28.6 cm

12.7 cm 5 in

300 ft-lbs 406.7 Nm

Wheel width

Castle nut torque

Fluid Capacities

Hydraulic tank capacity 5

1

/

2

gallons 20.8 liters

Hydraulic system capacity

(including tank)

6 gallons 22.7 liters

Continuous improvement of our products is a

Genie policy. Product specifications are subject to change without notice.

Part No. 48339 Genie GS-2046 & Genie GS-2646 & Genie GS-3246 2 - 1

Section 2 - Specifications Service Manual - First Edition

SPECIFICATIONS


GS-2646


Length


Width

96 in 243.8 cm

135

1

/

2

in 344.1 cm

46 in 116.8 cm


Height - stowed maximum



Rails up - CE

85

89

1

7

/

/

2

8

in

in

217.2 cm

228.3 cm


Rails lowered

Height , stowed maximum

Rails removed

85

46

1

1

/

/

2

8

in

in

217.2 cm

117.2 cm



39 in 99.1 cm

43

1

/

2

in 110.2 cm


Height, stowed maximum 89

7

/

8

in

68

1

/

8

in

228 cm

173 cm Height, stowed maximum

Rails folded

Platform height,

Stowed maximum

46

1

/

8

in 117.2 cm





Wheelbase



72

39 in

7

/

8 in

7.9 m

9.8 m

91

3

/

4

in 233.1 cm

0 in

99 cm

185.1 cm

0 cm


Length

Width

Extension length

Maximum load capacity

All Models

Weight

Ground clearance

45

89 in

3

/

4

in

39 in

1000 lbs

226 cm

116 cm

99 cm

454 kg

4646 lbs

4 in

7

/

8

in

2107 kg

10.2 cm




Load range

Tire contact area


Wheel diameter

15 x 5 x 11

1

/

4

in

38.1 x 12.7 x 28.6 cm

2,400 lbs 1,089 kg

10 sq in 64.5 sq cm

38.1 cm 15 in

11

1

/

4

in 28.6 cm

Wheel width

Castle nut torque

5 in 12.7 cm

300 ft-lbs 406.7 Nm

Fluid Capacities


1

/

2

gallons 20.8 liters

6 gallons 22.7 liters Hydraulic system capacity

(including tank)



2 - 2 Genie GS-2046 & Genie GS-2646 & Genie GS-3246 Part No. 48339


SPECIFICATIONS


GS-3246


Length


Width

96 in 243.8 cm

135

1

/

2

in 344.2 cm

46 in 116.8 cm





Rails up - CE

90

1

/

2

in

95 in

229.9 cm

241 cm


Rails lowered


Rails removed

83

51

3

1

/

/

4

4 in

in

212.7 cm

130.2 cm



39 in 99.1 cm

43

1

/

2

in 110.2 cm


Height, stowed maximum 95 in

73

3

/

8 in

241 cm

186 cm Height, stowed maximum

Rails folded

Platform height

Stowed maximum

51

1

/

4

in 130.2 cm





Wheelbase



72

39 in

7

/

8

in

11.75 m

11.6 m

99 cm

185.1 cm

91

3

/

4

in 233.1 cm

0 in 0 cm


Length

Width

Extension length

Maximum load capacity

All Models

Weight

Ground clearance

45

89 in

3

/

4

in

39 in

1000 lbs

226 cm

116 cm

99 cm

454 kg

5564 lbs

4 in

7

/

8

in

2524 kg

10.2 cm




Load range

Tire contact area


Wheel diameter

15 x 5 x 11

1

/

4

in

38.1 x 12.7 x 28.6 cm

2,400 lbs 1,089 kg

10 sq in 64.5 sq cm

38.1 cm 15 in

11

1

/

4

in 28.6 cm

Wheel width

Castle nut torque

5 in

300 ft-lbs

12.7 cm

406.7 Nm

Fluid Capacities before serial number 21920


1

/

2

gallons 20.8 liters

Hydraulic system capacity

(including tank)

6 gallons

Fluid Capacities after Serial Number 21919

22.7 liters

Hydraulic oil type Dexron equivalent

Hydrailic tank capacity 7 gallons

26.5 liters

Hydraulic system

(including tank)

7 gallons

26.5 liters





SPECIFICATIONS

Performance Specifications -

All Models

Drive speeds (maximum)

Stowed, maximum 2.2 mph 3.5 km/h

40 ft/12.4 sec 12.2 m/12.4 sec

Platform raised 0.5 mph 0.8 km/h

40 ft/54.5 sec 12.2 m/54.5 sec

Gradability

GS-2046, GS-2646

GS-3246

Function speeds, maximum from platform controls

30%

25%

GS-2046

Platform up

Platform down

GS-2646

Platform up

Platform down

GS-3246

Platform up

Platform down

28 to 32 seconds

26 to 30 seconds

28 to 32 seconds

26 to 30 seconds

55 to 59 seconds

38 to 40 seconds

Hydraulic Specifications -

All Models

Hydraulic fluid

Lift pump

Type: gear

Displacement per revolution

Displacement

Dexron equivalent

Hydraulic tank return line filter

10 micron with 25 psi

(1.7 bar) bypass

Function manifold

System relief valve pressure

(GS-2046 & GS-2646 models) 3700 psi 205.1 bar

Drive relief valve pressure

(GS-3246 models)

Lift relief valve pressure

(GS-3246 models)

Steer relief valve pressure

0.244 cu in 4 cc

4 gallons per minute

15.1 liters per minute

(2500 psi/172 bar)

3700 psi

2000 psi

1500 psi

205.1 bar

137.9 bar

103.4 bar



SPECIFICATIONS

Hydraulic Hose and Fitting Torque Specifications

Your machine is equipped with either 37° flared fittings and hose ends OR Parker Seal-Lok

®

fittings and hose ends. Machines that utilize Parker Seal-Lok

®

hoses and fittings require that the fittings and hose ends be torqued to specification when they are removed and installed or when new hoses or fittings are installed. Machines equipped with 37° flared fittings and hose ends do not need to be torqued to these specifications.

Hydraulic Hose and Fitting Torque Specifications

SAE O-ring Boss Port - tube fitting

SAE Dash

Size

-4

-6

Installing

Aluminum

Steel into...

Aluminum ft. lbs.

11

16

23

-8

-10

-12

Steel

Aluminum

Steel

Aluminum

Steel

Aluminum

Steel

35

40

60

69

105

93

140

-16

-20

-24

Aluminum

Steel

Aluminum

Steel

Aluminum

Steel

139

210

172

260

208

315

Nm

14.9

21.7

31.2

47.5

54.2

81.3

93.6

142.4

126.1

190

188.5

284.7

233.2

352.5

282

427.1

Seal-Lok® - hose end

SAE Dash

Size

-4

-6

-8 ft. lbs.

18

27

40

-10

-12

-16

-20

-24

63

90

120

140

165

Nm

24.4

36.6

54.2

85.4

122

162.7

190

223.7

Torque Procedure

1 Replace the O-ring. The O-ring must be replaced anytime the seal has been broken.

The O-ring cannot be re-used if the fitting or hose end has been tightened beyond finger tight.

The O-rings used in the Parker

Seal Lok® fittings and hose ends are a custom-size O-ring. They are not a standard SAE size Oring. They are available in the Oring field service kit (Genie pn.

49612).

2 Lubricate the O-ring before installation.

3 Be sure that the face seal O-ring is seated and retained properly.

4 Position the tube and nut squarely on the face seal end of the fitting and tighten the nut finger tight.

5 Tighten the nut or fitting to the appropriate torque per given size as shown in the table above.

6 Operate all machine functions and inspect the hoses and fittings and related components to be sure that there are no leaks.



This page intentionally left blank.


Service Manual - First Edition Section 3 - Scheduled Maintenance Inspections

Scheduled Maintenance Inspections

Observe and Obey:

Maintenance inspections shall be completed by a person trained and qualified on the maintenance of this machine.

Scheduled maintenance inspections shall be completed daily, quarterly, annually and every

2 years as specified on the

Maintenance

Inspection Report.

Failure to properly complete each inspection when required may cause death, serious injury or substantial machine damage.

Immediately tag and remove from service a damaged or malfunctioning machine.

Repair any machine damage or malfunction before operating machine.

Keep records on all inspections for three years.

A quarterly inspection must be completed for machines that have been out of service for a period longer than 3 months.

are

New parts required

Dealer service suggested

There are four types of maintenance inspections that must be performed according to a schedule— daily, quarterly, annual and every two years. To account for repeated procedures, the Maintenance

Tables and the Maintenance Inspection Report have been divided into four subsections—A, B, C,

D. Use the following chart to determine which group(s) of procedures are required to perform a scheduled inspection.

Inspection

Daily

Quarterly

Annual

Two year

Table or Checklist

A

A + B

A + B + C

A + B + C + D

Maintenance Tables

The maintenance tables contained in this section provide summary information on the specific physical requirements for each inspection.

Complete step-by-step instructions for each scheduled maintenance procedure are provided in section 4, Scheduled Maintenance Procedures.

Maintenance Inspection Report

The maintenance inspection report contains checklists for each type of scheduled inspection.

Make copies of the Maintenance Inspection

Report to use for each inspection. Store completed forms for three years.


Section 3 - Scheduled Maintenance Inspections

Maintenance Tables


Table A

A-1 Inspect the Operator's and Safety Manuals

A-2 Inspect the Decals and Placards

A-3 Inspect for Damage, Loose or Missing Parts

A-4 Check the Hydraulic Oil Level

A-5 Check for Hydraulic Leaks

A-6 Test the Platform and Ground Controls

A-7 Test the Manual Platform Lowering Operation

A-8 Test the Tilt Sensor

A-9 Test the Pothole Guards

A-10 Test the Lift/Drive Select Switch

A-11 Perform 30 Day Service

Table B

B-1 Check the Batteries

B-2 Inspect the Electrical Wiring

B-3

B-4

Inspect the Tires and Wheels

(including castle nut torque)

Test the Key Switch

Tools are required

New parts required




Table B,

continued

B-5 Test the Emergency Stop Buttons

B-6 Test the Horn

B-7 Test the Drive Brakes

B-8 Test the Drive Speed - Stowed Position

B-9 Test the Drive Speed - Raised Position

B-10

B-11

Perform Hydraulic Oil Analysis

See D-1 Test or Replace the Hydraulic Oil

Check the Electrical Contactor

Every 250 hours, perform the following engine maintenance procedure.

B-12 Replace the Hydraulic Return Filter

Table C

C-1 Check the Module Tray latch Components

Table D

D-1 Test or Replace the Hydraulic Oil

Section 3 - Scheduled Maintenance Inspections

MAINTENANCE TABLES

Tools are required

New parts required



Section 3 - Scheduled Maintenance Inspections Service Manual - First Edition

Maintenance Inspection Report

Model

Serial number

Date

Hour meter

Machine owner

Inspected by (print)

Inspector signature

Inspector title

Inspector company

Instructions

· Make copies of this page to use for each inspection.

· Select the appropriate checklist(s) for the type of inspection to be performed.

Daily Inspection: A

Quarterly Inspection: A+B

Annual Inspection: A+B+C

2 Year Inspection: A+B+C+D

· Place a check in the appropriate box after each inspection procedure is completed.

· Use the maintenance tables in this section and the step-by-step procedures in section 4 to learn how to perform these inspections.

· If any inspection receives an “N,” tag and remove the machine from service, repair and re-inspect it. After repair, place a check in the “R” box.

Legend

Y = yes, acceptable

N = no, remove from service

R = repaired

Comments

Checklist A

Refer to Table A

A-1 Operator's and

Safety manuals

A-2 Decals and Placards

A-3 Damage and loose or

Missing Parts

Tools

N R

are required

New Dealer required service suggested

C-1 Latch Components

Checklist D

Refer to Table D

D-1 Hydraulic oil

A-4 Hydraulic Oil Level

A-5 Hydraulic Leaks

A-6 Platform and

Ground Controls

A-7 Manual Platform Lowering

A-8 Tilt Sensor

A-9 Pothole Guards

A-10 Lift/drive Select Switch

A-11 30 Day Service

Checklist B

Refer to Table B

B-1 Batteries

B-2 Electrical Wiring

B-3 Tires and Wheels

B-4 Key Switch

B-5 Emergency Stop

B-6 Horn

B-7 Drive Brakes

B-8 Drive Speed - stowed

B-9 Drive Speed - raised

B-10 Hydraulic Oil Analysis

B-11 Electrical Contactor

(before serialnumber 6901)

Perform every 250 hours

B-12 Hydraulic Return Filter

Y N R

Y N R

Y N R


Service Manual - First Edition Section 4 - Scheduled Maintenance Procedures

Scheduled Maintenance Procedures


Maintenance inspections shall be completed by a person trained and qualified on the maintenance of this machine.

Scheduled maintenance inspections shall be completed daily, quarterly, annually and every

2 years as specified on the Maintenance

Inspection Report.

Failure to properly complete each inspection when required may cause death, serious injury or substantial machine damage.


Repair any machine damage or malfunction before operating machine.

Keep records on all inspections for three years.

Unless otherwise specified, perform each procedure with the machine in the following configuration:

· Machine parked on a flat level surface

· Platform in the stowed position

· Key switch in the

OFF

position with the key removed

· Wheels chocked

About This Section

This section contains detailed procedures for each scheduled maintenance inspection.

Each procedure includes a description, safety warnings and step-by-step instructions.

Symbols Legend







Indicates that a specific result is expected after performing a series of steps.


Section 4 - Scheduled Maintenance Procedures

Table A Procedures


A-1

Inspect the Operator’s and

Safety Manuals

Maintaining the operator’s and safety manuals in good condition is essential to safe machine operation. Manuals are included with each machine and should be stored in the container provided in the platform. An illegible or missing manual will not provide safety and operational information necessary for a safe operating condition.

1 Check to be sure the storage container is present and in good condition.

2 Check to make sure that the operator’s, responsibilities and safety manuals are present and complete in the storage container in the platform.

3 Examine the pages of each manual to be sure that they are legible and in good condition.

4 Always return the manuals to the storage container after use.

Contact your authorized Genie distributor or Genie Industries if replacement manuals are needed.

A-2

Inspect the

Decals and Placards

Maintaining all of the safety and instructional decals and placards in good condition is mandatory for safe machine operation. Decals alert operators and personnel to the many possible hazards associated with using this machine. They also provide users with operation and maintenance information. An illegible decal will fail to alert personnel of a procedure or hazard and could result in unsafe operating conditions.

1 Refer to the

Decals section in the appropriate


GS-2646 & Genie GS-3246 Operator's Manual and use the decal list and illustrations to determine that all decals and placards are in place.

2 Inspect all decals for legibility and damage.

Replace any damaged or illegible decal immediately.

Contact your authorized Genie distributor or Genie Industries if replacement decals are needed.



TABLE A PROCEDURES

A-3

Inspect for Damage and Loose or

Missing Parts

Daily machine condition inspections are essential to safe machine operation and good machine performance. Failure to locate and repair damage, and discover loose or missing parts may result in an unsafe operating condition.

1 Inspect the entire machine for damage and improperly installed or missing parts including:

· Electrical components, wiring and electrical cables

· Hydraulic power unit, tank, hoses, fittings, cylinders and manifolds

· Battery pack and connections

· Drive motors

· Wear pads

· Tires and wheels

· Limit switches, alarms and horn

· Nut, bolts and other fasteners

· Platform entry chain or gate

· Beacons and alarms (if equipped)

· Brake release components

· Safety arm

· Pothole guards

· Platform extension

· Scissor pins and retaining fasteners

· Platform control joystick

· Inverter (if equipped)

Check the entire machine for:

· Cracks in welds or structural components

· Dents or damage to machine

· Be sure that all structural and other critical components are present and all associated fasteners and pins are in place and properly tightened

· Side rails installed and bolts are fastened

· Be sure that the chassis trays are in place, latched and properly connected


Section 4 - Scheduled Maintenance Procedures Service Manual - First Edition

TABLE A PROCEDURES

A-4

Check the Hydraulic Oil Level

Maintaining the hydraulic oil at the proper level is essential to machine operation. Improper hydraulic oil levels can damage hydraulic components. Daily checks allow the inspector to identify changes in the oil level that might indicate the presence of hydraulic system problems.

Perform this procedure with the platform in the stowed position.

1 Visually inspect the oil level in the hydraulic tank through the sight gauge in the side of the power unit module.

Result: The hydraulic oil level should be within the

FULL

and

ADD

marks on the oil level indicator decal.

2 Add oil if necessary. Do not overfill.

Hydraulic Oil Specifications

All Models Before Serial Number 21920

Hydraulic oil type

Hydraulic tank capacity

Dexron equivalent

5.5 gallons

20.8 liters

Hydraulic system

(including tank)


GS-3246 After Serial Number 21919

6 gallons

22.7 liters



26.5 liters

Hydraulic system

(including tank)

7 gallons

26.5 liters

A-5

Check for Hydraulic Leaks

Detecting hydraulic fluid leaks is essential to operational safety and good machine performance. Undiscovered leaks can develop into hazardous situations, impair machine functions and damage machine components.

1 Inspect for hydraulic oil puddles, dripping or residue on or around the following areas:

· Hydraulic tank, return filter, fittings and hoses

· Hydraulic power unit, fittings and hoses

· Hydraulic lift cylinder(s) and manual lowering valve(s)

· Function manifold

· The underside of the drive chassis

· Drive motors

· Drive brakes

· Ground area under the machine



TABLE A PROCEDURES

A-6

Test the Platform and

Ground Controls

Testing the machine functions and the Emergency

Stop buttons for malfunctions is essential for safe machine operation. An unsafe working condition exists if any function fails to operate properly or either Emergency Stop button fails to stop all the machine functions. Each function should operate smoothly and be free of hesitation, jerking and unusual noise.

1 Turn the key switch to ground control and pull out the Emergency Stop button to the

ON position at both the platform and ground controls.

2 Activate the platform up function.

Result: The platform should raise.

3 Activate the platform down function.

Result: The platform should lower. The descent alarm should sound while the platform is lowering.

4 Push in the ground controls Emergency Stop button to the

OFF

position.

Result: No function should operate.

5 Turn the key switch to platform control and pull out the Emergency Stop button to the

ON position at both the ground and the platform controls.

6 Press and hold the lift function enable button

OR move the lift/drive selector switch to the lift position, OR press the lift function selector button.

7 Press and hold the function enable switch on the control handle.

Result: The green power light should come on,

OR the light below the lift selector button should come on.

8 Slowly move the control handle in the direction indicated by the blue arrow.

Result: The platform should raise. The pothole guards should deploy.

9 Release the control handle.

Result: The platform should stop raising.

10 Press and hold the function enable switch.

Slowly move the control handle in the direction indicated by the yellow arrow.

Result: The platform should lower. The descent alarm should sound while the platform is lowering.

CE models: When lowering the platform, the platform should stop when it is 6 feet (1.8 m) from the ground. Be sure the area below the platform is clear of personnel and obstructions before continuing. To continue lowering, release the control handle, wait

4-6 seconds, then move the control handle again.

11 Push in the Emergency Stop button to the

OFF position.

Result: No function should operate. The machine should stop.

As a safety feature, selecting and operating the ground controls will override the platform controls, except the

Emergency Stop button.



TABLE A PROCEDURES

A-7

Test the Manual Platform

Lowering Operation

Detection of manual platform lowering system malfunctions is essential for safe machine operation. An unsafe working condition exists if the manual platform lowering function does not operate in the event of a main power loss.



2 Raise the platform approximately

2 feet (0.6 m).

3 Pull the manual platform lowering handle or push the manual lowering button located next to the ground controls.

Result: The platform should lower. The descent alarm will not sound.

A-8

Test the Tilt Sensor

Perform this test from the ground with the platform controls. Do not stand in the platform.

1 Fully lower the platform.

2 Place a 2x4 inch (5x10 cm) block or similar piece of wood in front of both wheels on one side and drive the machine up onto them.

3 Raise the platform.

Result: When the platform is raised 7 feet

(2.1 m) from the ground, an alarm should sound.

CE models: When the platform is raised 7 feet (2.1 m) from the ground, an alarm should sound and the lift and drive functions should not operate.

4 Lower the platform and drive the machine off the blocks.



TABLE A PROCEDURES

A-9

Test the Pothole Guards

The pothole guards should automatically deploy when the platform is raised. The pothole guards activate two limit switches which controls the machine drive speed. If the pothole guards do not deploy and the platform is raised above 6 feet (1.8 meters), an alarm sounds and the machine will not drive.

1 Raise the platform.

Result: When the platform is raised 4 feet

(1.2 meters) from the ground, the pothole guards should deploy.

2 Press on the pothole guards on one side, and then the other.

Result: The pothole guards should not move.

3 Lower the platform.

Result: The pothole guards should return to the stowed position.

4 Place a 2x4 inch (5x10 cm) block or similar piece of wood under the pothole guard. Raise the platform.

Result: When the platform is raised approximately 6 feet (1.8 meters), an alarm should sound and the drive function should not work.

5 Lower the platform and remove the block of wood.

A-10

Test the Lift/Drive Select Switch

(before serial number 17408)

A properly functioning Lift/Drive Select Switch is essential for safe machine operation. An improperly operating Lift/Drive Select Switch will fail to activate the appropriate platform control which may result in a hazardous situation.



2 Move the lift/drive select switch to the

LIFT position.


Result: The green power light should come on.

4 Slowly move the control handle off center.

Result: The platform should raise or lower.

5 Move the lift/drive select switch to the

DRIVE position.


Result: The green power light should come on.

7 Slowly move the control handle off center.

Result: The drive and steer functions should operate.



TABLE A PROCEDURES

A-11

Perform 30 Day Service

The 30 day maintenance procedure is a one-time sequence of procedures to be performed after the first 30 days or 50 hours of usage. After this interval, refer to the maintenance tables for continued scheduled maintenance.

1 Perform the following maintenance procedures:

· B-3 Inspect Tires and Wheels

· B-12 Replace the Hydraulic Filter




Table B Procedures

B-1

Check the Batteries

Proper battery condition is essential to good machine performance and operational safety.

Improper fluid levels or damaged cables and connections can result in component damage and hazardous conditions.

Bodily injury hazard. Batteries contain acid. Avoid spilling or contacting battery acid. Neutralize battery acid spills with baking soda and water.

Electrocution hazard. Contact with hot or live circuits may result in death or serious injury.

Remove all rings, watches and other jewelry.

Perform this test after fully charging the batteries.

1 Put on protective clothing and eye wear.

2 Disconnect the battery pack from the machine.

3 Be sure that the battery cable connections are free of corrosion.

4 Be sure that the battery hold downs and cable connections are tight.

5 Remove the battery vent caps and check the specific gravity of each battery cell with a hydrometer.

Result: If any battery cell displays a specific gravity of less than 1.098, the battery must be replaced.

6 Check the battery acid level of each battery. If needed, replenish with distilled water to the bottom of the battery fill tube. Do not overfill.

7 Install the battery vent caps.

8 Check each battery pack and verify that the batteries are wired correctly.



TABLE B PROCEDURES

B-2

Inspect the Electrical Wiring

Maintaining electrical wiring in good condition is essential to safe operation and good machine performance. Failure to find and replace burnt, chafed, corroded or pinched wires could result in unsafe operating conditions and may cause component damage.

Electrocution hazard. Contact with hot or live circuits could result in death or serious injury.


1 Inspect the following areas for burnt, chafed, corroded and loose wires:

· Ground control panel

· Hydraulic power unit module tray

· Battery pack module tray

· Scissor arms

· Platform controls


ON position.

3 Raise the platform approximately 8 feet (2.4 m) from the ground.

4 Lift the safety arm, move to the center of the scissor arm and rotate down to a vertical position.

5 Lower the platform onto the safety arm.

Crushing hazard. Keep hands clear of the safety arm when lowering the platform.

6 Inspect the center chassis area and scissor arms for burnt, chafed and pinched cables.

7 Inspect the following areas for burnt, chafed, corroded, pinched and loose wires:

· ECM to platform controls

· Power to platform wiring

8 Raise the platform and return the safety arm to the stowed position.

9 Lower the platform to the stowed position and turn the machine off.



TABLE B PROCEDURES

B-3

Inspect the Tires and Wheels

(including castle nut torque)

Maintaining the tires and wheels in good condition is essential to safe operation and good performance. Tire and/or wheel failure could result in a machine tip-over. Component damage may also result if problems are not discovered and repaired in a timely fashion.

1 Check the tire surface and sidewalls for cuts, cracks or unusual wear.

2 Check each wheel for damage, bends and cracks.

3 Remove the cotter pin and check each castle nut for proper torque.

4 Install a new cotter pin.

Always replace the cotter pin with a new one when removing the castle nut or when checking the torque of the castle nut.


Castle nut torque, dry 300 ft-lbs

Castle nut torque, lubricated 225 ft-lbs

405 Nm

305 Nm

B-4

Test the Key Switch

Proper key switch action and response is essential to safe machine operation. The machine can be operated from the ground or platform controls and the activation of one or the other is accomplished with the key switch. Failure of the key switch to activate the appropriate control panel could cause a hazardous operating situation.

1 Pull out the Emergency Stop button to the

ON position at both the ground and platform controls.

2 Turn the key switch to platform control.

3 Check the platform up/down function from the

ground controls.

Result: The machine functions should not operate.

4 Turn the key switch to ground control.

5 Check the machine functions from the

platform controls.

Result: The machine functions should not operate.

6 Turn the key switch to the

OFF

position.

Result: No machine functions should operate.



TABLE B PROCEDURES

B-5

Test the Emergency Stop Buttons

Properly functioning Emergency Stop buttons are essential for safe machine operation. An improperly operating Emergency Stop button will fail to shut off power and stop all machine functions resulting in a hazardous situation.

As a safety feature, selecting and operating the ground controls will override the platform controls, except the platform Emergency

Stop button.



2 Push in the Emergency Stop button at the ground controls to the

OFF

position.




4 Push down the Emergency Stop button at the platform controls to the

OFF

position.


The ground control Emergency

Stop button will stop all machine operation, even if the key switch is switched to platform control.

B-6

Test the Service Horn

A functioning horn is essential to safe machine operation. The horn is activated at the platform controls and sounds at the ground as a warning to ground personnel. An improperly functioning horn will prevent the operator from alerting ground personnel of hazards or unsafe conditions.


ON

position at both the ground and platform controls.

2 Push down the horn button at the platform controls.

Result: The horn should sound.

The standard machine uses the multifunction alarm to emit the horn sound. The optional horn will sound like an automotive type horn.



TABLE B PROCEDURES

B-7

Test the Drive Brakes

Proper brake action is essential to safe machine operation. The drive brake function should operate smoothly, free of hesitation, jerking and unusual noise. Hydraulically released individual wheel brakes can appear to operate normally when not fully operational.

Perform this procedure with the machine on a firm, level surface that is free of obstructions.

Be sure the platform extension deck is fully retracted and the platform is in the stowed position.

1 Mark a test line on the ground for reference.



3 Lower the platform to the stowed position.

4 Move the drive select toggle switch down for normal drive operation OR press the drive speed selector button until the indicator light is

OFF

.

5 Choose a point on the machine; i.e., contact patch of a tire, as a visual reference for use when crossing the test line.

6 Bring the machine to full drive speed before reaching the test line. Release the function enable switch or the joystick on the platform controls when your reference point on the machine crosses the test line.

7 Measure the distance between the test line and your machine reference point.

Braking: paved surface

Stopping distance 2 ft 0.6 m

Result: The machine stops within the specified braking distance. No action required.

Result: The machine does not stop within the specified braking distance. Proceed to step 8 and determine if the machine is equipped with a dynamic braking valve.

The brakes must be able to hold the machine on any slope it is able to climb.


Electrocution hazard. Contact with electrically charged circuits could result in death or serious injury.


9 Locate the drive forward/reverse valve on the function manifold. Refer to Illustrations 1

Part No. 48339 a a drive forward/reserve valve

Genie GS-2046 & Genie GS-2646 & Genie GS-3246 4 - 13


TABLE B PROCEDURES

10 Tag the forward and the reverse valve coils.

Remove the coils from the valve.

The forward valve coil has white and brown wires attached.

The reverse valve coil has white/black and brown wires attached.

For reassembly, it will be helpful to leave the wire harness attached to the valve coils.

11 Remove the drive forward/reverse valve from the function manifold. Cap the open port of the manifold.

12 Carefully inspect the hex portion of the valve for an identification stamp.

Result: SV10-4727 is stamped on the hex portion of the drive forward/reverse valve. This indicates the machine is equipped with a dynamic brake valve. Proceed to step 13.

Result: SV10-4727 is not stamped on the hex portion of the drive forward/reverse valve. This indicates the machine is not equipped with a dynamic brake valve. Proceed to step 18.

13 Install the drive forward/reverse valve removed in step 11 into the function manifold and securely tighten. Torque to 25 ft-lbs / 34 Nm.

14 In order, install the reverse valve coil (with white/black and brown wires), spacer washer and the forward valve coil (with white and brown wires) onto the valve.

For the machine to function correctly, the reverse valve coil must be closest to the manifold.

15 Install the coil nut onto the valve and tighten.

Torque to 60 in-lbs / 7 Nm.

16 Connect the battery pack to the machine.

7 Replace the brakes and repeat this procedure beginning with step 1. Refer to Repair Procedure

8-1,

How to Remove a Drive Brake.

18 Contact the Genie Industries Service Parts

Department and order kit part number 105457.

19 Install the new valve received in the kit and mark the new valve with a white paint pen to identify new valve installation.

20 Repeat this procedure beginning with step 1.

If the machine fails to stop within the specified stopping distance after installing new brakes, please contact the Genie Industries Scissors

Service Department, 1-800-536-1800 Ext. 8710.



TABLE B PROCEDURES

B-8

Test the Drive Speed -

Stowed Position

Proper drive function movement is essential to safe machine operation. The drive function should respond quickly and smoothly to operator control.

Drive performance should also be free of hesitation, jerking and unusual noise over the entire proportionally controlled speed range.

Select a test area that is firm, level and free of obstructions.

1 Create start and finish lines by marking two lines on the ground 40 feet (12.2 m) apart.





OFF

.


6 Bring the machine to maximum drive speed before reaching the start line. Begin timing when your reference point on the machine crosses the start line.

7 Continue at full speed and note the time when the machine reference point passes over the finish line. Return the control handle to center.

Drive speed:

Stowed position 40 ft / 12.4 sec 12.2 m / 12.4 sec

B-9

Test the Drive Speed -

Raised Position

Proper drive function movement is essential to safe machine operation. The drive function should respond quickly and smoothly to operator control.

Drive performance should also be free of hesitation, jerking and unusual noise over the entire proportionally controlled speed range.


1 Create start and finish lines by marking two lines on the ground 40 feet (12.2 m) apart.



3 Raise the platform approximately 6 feet (2 m).


OFF

.


6 Bring the machine to maximum drive speed before reaching the start line. Begin timing when your reference point on the machine crosses the start line.

7 Continue at full speed and note the time when the machine reference point passes over the finish line. Return the control handle to center.

Drive speed (maximum):

Platform raised 40 ft / 54.5 sec 12.2 m / 54.5 sec



TABLE B PROCEDURES

B-10

Perform Hydraulic Oil Analysis

See D-1, Test or Replace the Hydraulic Oil.

B-11

Check the Electrical Contactor -


Maintaining the electrical contactor in good condition is essential to safe machine operation.

Failure to locate a worn or damaged contactor could result in an unsafe working condition and component damage.

1 Open the hydraulic power unit module tray and locate the electrical contactor mounted above the hydraulic power unit.

2 Visually inspect the contact points of each contactor for the following items:

· Excessive burns

· Excessive arcs

· Excessive pitting

Replace the contactor if any damage is found.



B-12

Replace the Hydraulic Return

Filter

Replacement of the hydraulic filter is essential for good machine performance and service life. A dirty or clogged filter may cause the machine to perform poorly and continued use may cause component damage. Extremely dirty conditions may require that the filter be replaced more often.

Bodily injury hazard. Beware of hot oil. Contact with hot oil may cause severe burns.

The hydraulic filter is mounted on the function manifold next to the hydraulic power unit.

1 Clean the area around the hydraulic return filter, then remove the filter with an oil filter wrench.

2 Apply a thin layer of oil to the new oil filter gasket.

3 Install the new filter (Genie part number 55616) and tighten it securely by hand. Clean up any oil that may have spilled during the replacement procedure.


ON position at both the ground and platform controls. Activate and hold the platform up toggle switch.

5 Inspect the filter and related components to be sure that there are no leaks.


TABLE B PROCEDURES



Table C Procedure

C-1

Check the Module Tray Latch

Components

Maintaining the module tray latch components in good condition is essential to good performance and service life. Failure to detect worn out latch components may result in module trays opening unexpectedly, creating an unsafe operating condition.


1 Lubricate each module tray latch. Using light oil, apply a few drops to the side of the latch pin.

2 Inspect each module tray latch pad (if equipped). Replace any worn pad before the latch will fail to securely hold the module tray closed.




Table D Procedure

D-1

Test or Replace the Hydraulic Oil

Replacement or testing of the hydraulic oil is essential for good machine performance and service life. Dirty oil and suction strainer may cause the machine to perform poorly and continued use may cause component damage.

Extremely dirty conditions may require oil changes to be performed more often.

This machine uses Dexron equivalent hydraulic oil. Before replacing the hydraulic oil, the oil may be tested by an oil distributor for specific levels of contamination to verify that changing the oil is necessary. If the hydraulic oil

is not replaced at the two year inspection, test the oil quarterly. Replace the oil when it fails the test.



2 Open the power unit module tray and place a drain pan or other suitable container under the hydraulic tank.

3 Remove the drain plug from the hydraulic tank.

Bodily injury hazard. Spraying hydraulic oil can penetrate and burn skin. Loosen hydraulic connections very slowly to allow the oil pressure to dissipate gradually. Do not allow oil to squirt or spray.

4 Completely drain the tank into a suitable container. See capacity specifications listed to the right.

5 Tag, disconnect and plug the suction hose and return hose from the hydraulic tank.

6 Remove the hydraulic tank from the machine.

7 Remove the suction strainer and clean it using a mild solvent.

8 Clean the inside of the hydraulic tank using a mild solvent.

9 Install the suction strainer using thread sealer on the threads.

10 Install the drain plug using thread sealer on the threads.

11 Install the hydraulic tank.

12 Fill the tank with hydraulic oil until the fluid is within the

FULL

and

ADD

marks on the oil level indicator decal. Do not overfill.



TABLE D PROCEDURES

13 Clean up any oil that may have spilled. Properly dispose of the oil.

14 Operate all machine functions through a full cycle and check for leaks.


Before Serial Number 21920


Hydraulic tank capacity 5.5 gallons

20.8 liters

Hydraulic system

(including tank)


After Serial Number 21919

6 gallons

22.7 liters



26.5 liters

Hydraulic system

(including tank)

7 gallons

26.5 liters



Service Manual - First Edition Section 5 - Troubleshooting Flow Charts

Troubleshooting Flow Charts


Troubleshooting and repair procedures shall be completed by a person trained and qualified on the repair of this machine.


Repair any machine damage or malfunction before operating the machine.

Unless otherwise specified, perform each repair procedure with the machine in the following configuration:


· Platform in stowed position


OFF

position with the

key removed

· Wheels chocked

Before Troubleshooting:

Read, understand and obey the safety rules and operating instructions printed in the


GS-2646 & Genie GS-3246 Operator’s

Manual.

Be sure that all necessary tools and test equipment are available and ready for use.

Read each appropriate flow chart thoroughly.

Attempting shortcuts may produce hazardous conditions.

Be aware of the following hazards and follow generally accepted safe workshop practices.

Crushing hazard. When testing or replacing any hydraulic component, always support the structure and secure it from movement.

Electrocution hazard. Contact with electrically charged circuits may result in death or serious injury. Remove all rings, watches and other jewelry.


Perform all troubleshooting on a firm level surface.

Two persons will be required to safely perform some troubleshooting procedures.


Section 5 - Troubleshooting Flow Charts Service Manual - First Edition

TROUBLESHOOTING FLOW CHARTS


When a malfunction is discovered, the flow charts in this section will help a service professional pinpoint the cause of the problem. To use this section, basic hand tools and certain pieces of test equipment are required—voltmeter, ohmmeter, pressure gauges.

The location of terminals mentioned in this section can be found on the appropriate electrical or hydraulic schematics provided in Section 6,

Schematics.

Since various degrees of a particular function loss may occur, selecting the appropriate flow chart may be troublesome. When a function will not operate with the same speed or power as a machine in good working condition, refer to the flow chart which most closely describes the problem.

General Repair Process

Malfunction discovered

Identify symptoms problem still exists

Return to service problem solved

Inspect and test

Troubleshoot

Perform repair

5 - 2

LED Diagnostic Readout

The diagnostic readout displays numerical codes that provide information about the machine operating status and about malfunctions. The dot to the right of the numbers will blink during normal operation codes and remain on with fault codes.

The codes listed in the Operation Code Chart are common operational status codes and malfunction codes that can be cleared easily.

The codes listed in the Fault Code Chart describe malfunctions and can aid in troubleshooting the machine by pinpointing the area or component affected.



Fault Code Chart


Fault Code

00

18

19

33

34

35

51

Problem Possible Causes Solution

Reset the ECM. If problem remains, replace the ECM.

Alarm sounds continuously.

Error indicator light on at the Pothole guard may be blocked platform controls when function or pothole limit switches may enable switch is engaged. not be activating or there is a

Machine will not drive. Machine bad wire connection. is not level.

Remove obstruction to pothole guard OR check pothole limit switch wiring for open connections OR check pothole limit switch for proper adjustment and activation.

Alarm sounds continuously.

Error indicator light on at the platform controls when function or pothole limit switches may enable switch is engaged.

Pothole guard may be blocked not be activating or there is a

Machine will not drive. Machine bad wire connection. is level.

Remove obstruction to pothole guard OR check pothole limit switch wiring for open connections OR check pothole limit switch for proper adjustment and activation.

Machine will not operate. Error Joystick initialization OK but indicator light on at the platform function enable switch is tied controls.

down.

Machine unit will not operate.

Error indicator light on at the platform controls.

Machine unit will not operate.

Error indicator light on at the platform controls.

ECM does not recognize the platform controls.

ECM does not recognize the platform controls.

Release the function enable switch OR check the switch for continuity in the joystick controller box (see Repair

Section).

Replace joystick controller box main circuit board OR replace the coil cord.

Replace joystick controller box main circuit board.

Only the platform down function operates no other functions operate. Error indicator light on at the platform the motor contactor.

controls when the function enable switch is engaged.

No power output from ECM to

Check wiring and terminal at motor contactor ckt A9-Curtis terminal 3 OR check wiring and terminal at control ECM pin A9, ckt A9-Curtis terminal 3.

Notes


Continued on next page

5 - 3

Section 5 - Troubleshooting Flow Charts

FAULT CODE CHART

(BEFORE SERIAL NUMBER 17408)


Fault Code

52

53

54

55

56

57

58

Notes


Machine will not drive forward.

Pump motor starts. Error indicator light on at the platform

No power output from ECM to the drive forward coil.


Check wiring and terminal at the forward coil, ckt C6-

Forward coil OR check wiring and terminal at control ECM pin C6, ckt C6 Forward coil.

Machine will not drive in reverse. Pump motor starts.

Error indicator light on at the platform controls when the function enable switch is engaged.

No power output from ECM to the drive reverse coil.

Check wiring and terminal at the reverse coil, ckt A7-

Reverse coil OR check wiring and terminal at ECM pin A7, ckt A7 Reverse coil.

Platform will not raise. Pump motor starts. Error indicator light on at the platform controls

No power output from ECM to the platform up coil.

when the function enable switch is engaged.

Check wiring and terminal at the platform up coil, ckt A6-Up coil OR check wiring and terminal at ECM pin A6, ckt A6

Up coil.

Platform will not lower. Error indicator light on at the platform No power output from ECM to controls when the function enable switch is engaged.

the platform lowering coil.

Check wiring and terminal at the platform lowering coil, ckt

B6-Down coil OR check wiring and terminal at ECM pin B6, ckt B6 Down coil.

Machine will not steer right.


No power output from ECM to steer right coil.


Check wiring and terminal at the steer right coil, ckt C7

Right coil OR check wiring and terminal at ECM pin C7, C7

Right coil.

Machine will not steer left.


No power output from ECM to steer left coil.


Check wiring and terminal at the steer left coil, ckt B7 Left coil OR check wiring and terminal at ECM pin B7, B7

Left coil.

Machine will not drive but platform will still raise.

No power output from ECM to the brake orifice coil.

Check wiring and terminal at the orifice coil, ckt C9 orifice coil OR check wiring and terminal at ECM pin C9, C9 orifice coil OR replace Coil.

5 - 4 Genie GS-2046 & Genie GS-2646 & Genie GS-3246


Part No. 48339


FAULT CODE CHART

(BEFORE SERIAL NUMBER 17408)

Fault Code Problem Possible Causes Solution

60

63

88 no code available no code available

Machine will not operate. Error indicator light on at the platform

Lift/drive switch is turned "off" or in a neutral position.

controls.

Check switch position OR

Replace switch.

Machine will not operate.

Flashing green LED at the platform controls.

Lift/drive switch turned from lift to drive or drive to lift while the function enable switch is engaged.

Release function enable switch and move lift/drive switch to either lift or drive.

Machine will not operate. ECM cannot be reset.

EPROM not programmed.

Replace ECM.

Green flashing LED at the platform controls.

Release function enable switch

Function enable switch held for

OR check the function enable microswitch for continuity in more than 10 seconds without the joystick controller box. activating any function.

Reset controller and check for fault code 33 at power up.

Machine drive speed reduces to off limit drive speed OR platform raises slowly. Red flashing LED at the platform controls while function enable switch is activated.

Low Voltage Cut Back (LVCB) is activated because battery supply voltage is 18.5V DC or less.

Charge batteries.

Notes



5 - 5

Section 5 - Troubleshooting Flow Charts Service Manual - First Edition

Normal Operation Code Chart


C o d e

2 0 f l a s h i n g

2 1 f l a s h i n g

2 2 f l a s h i n g

2 3 f l a s h i n g

2 4 f l a s h i n g

2 5 f l a s h i n g

3 1 f l a s h i n g

3 2 f l a s h i n g

3 6 f l a s h i n g

3 7 f l a s h i n g

3 8 f l a s h i n g

3 9 f l a s h i n g

4 0 f l a s h i n g

C

K o e n y d s i t i w o i t n c h t o p l a t f o r m c o n t r o l

P l a t f o r m e x t e n d e d a b o v e 6

G o r u o u t t n o d t h c o n t r o l e o n p o a s i n d t i o n p l a t f o r m f e e t

E m e r g e n c y S t o p b u t t o n s p u ll e d

E x p l a n a t i o n

M a c

S t o p h i n b u e t t w a s o n o p w a s e r a p u t i n g s h e d g r o u n d c o n t r o l .

A l a r m w i n o r m a ll i n a g o n d o f ll f y , t h t h e u n t e k li n e y k t e h s y e w s p w l a i t c h i t t f c o r w h i m a s s

E t u m r n e e r t u r n e d g d e t t o n o c y p l a t o u t .

f o r m c o n t r o l o r t h e p l a t f o r m E m e r g e n c y S t o p b u t t o n i s p u ll e d

K e y s w i t c h t o p l a t f o r m c o n t r o l

P l a t f o r m e x t e n d e d a b o v e 6

G r o u o u t t n o d t h c o n t r o l e o n p o a s i n d t i o n p l a t f o r m f e e t

E m e r g e n c y S t o p b u t t o n s p u ll e d

K e y s w i t c h t o g r o u n d c o n t r o l

G r o u n d p o s i t i o n

P l a t f o r m c o n t r o l c o n t r o l

E m e r g e n c y

E m e r g e n c y

S t o p

S t o p b u t t o n b u t t o n p u ll e d p u s h o e d u t i n t o t o t h e t h e o n o f f p o s i t i o n

K t o e

G r y t h s o u e w n d i t c h c o n t r o l o n p t o o s i g t i r o a o n u n n d d p l c o n a t f o t r o r m l

E r r o r i n d i c a t o r il g h t a t

E m e r g e n c p l a t f o r m c o n t r o l s y i s

S t o p o n b u t t o n s p u ll e d o u t

K e y

G r s w o u n d i t c h t o g c o n t r o l r o

E u n m e d c o n t r o r g e n c y l

S t o p b u t t o n p o s i t i o n

P l a t f o r m p o s i t i o n

P l a t f o r m c o n t r o l E m e r g e n c y e x t e n d e d l e s s t h a n

S t o p b u t t o n p u s h e d i n

6 f e e t .

p u ll e d o u t t o t o t h e o n t h e o f f

N o r m a l o p e r a t i o n

T t h

T

T t o u o e r h e c p l a t f o r m n c l l e p e k a r e y a r l a t t h i s s w h t f o r i s m c o

E m e r g e n c y i t c h c o d d t e o e

E m e r

,

, b p g b e l a e e n t s u f o s u c y r e

S r m r e

S t t j o y s t i c k i s o j o o p c o p y b n t s t u i t t r o b u c t t o l .

k o n i s n o p r o p e r l y u t t o t h e c o n o n n e c t e d o r p o s i t i o n .

o p r o p e u t t o r l y t h e c o n o n n e c t e d o r p o s i t i o n .

p u p u ll ll

K

G r o e u y o u t t s n o w d i t t h c h e t o o n g c o n t r o l p r o o a s i u n n d d t i o n c o n t r o l p l a t f o r m E m e r g e n c y

E r r o r

P l a t f o i r n d m i c a e x t t o r e n il g h t d e d a t p l e s s l a t f o t h a n r m

6 c o n f e e t t r o l s i s

S t o n o p b u t t o n s p u ll e d

K e y

G r o s w u n d i t c h t o p c o n t r o l l a t f o r a n d m p c l a o n t t f o r r o m l

E m e r g e n c y o u t t o t h e o n p o s i t i o n .

S t o p b u t t o n s p u ll e d

K

G e r y o s w u n d i t c h c o n t o t r o p l l a t f o r

E m e m r g c o n t r o l e n c y S t o p b u t t o n p o s i t i o n

P l a t f o r m p o s i t i o n .

c o n t r o l E m e r g e n c y p u ll e d o u t

S t o p b u t t o n p u s h e d i n t o t o t h e o n t h e o f f

T

N

T t u o o r h e r n m c p k l e a e y l a l a r o t s w h t f o r i s m i t c h p e r a t c o d t o i o n .

e

E m e r

, p g b l a e e n t f o s u c y r m r e

S t o c o j o p y n t s t i r o b u c t t l .

k o i s n o p r o p e u t t o r l y t h e c o n o n n e c t e d o r p o s i t i o n .

p u ll

K e y

G o

K r u e o t y u t s w s

G o r u o u t t n o d t h c o n t r o l e o n p o a s i n d t i o n p l a t f o r m

L i f t / d r i v e s w i t c h t o il f t p o s i t i o n

E m e r g e n c y

K o e

G r u y t t s o u o w n d i t t h c h e t o o n p c o n t r o l p l a o t f a s i o r n d m t i o n p c l a o n t t f o r r o m l

L i f t / d r n o

L i f t / d r i d w i t i t i v e c c o n t r o l t h e v e h c h s t o t w i o t c p h l a t t f o r a o n d m o s w n i t p o s i t i o n c h t o il f t p c l a d r i v e o n t f o r p o s i t i t r o m o n p l a t f o r m c o n t r o l l

E m e p o s i t i o n r g e n c y

E m e r g e n c y

S t o p

S t o p

S t o p b u t t o n s p u b u t t o n s p u b u t t o n s p u ll e d ll e d ll e d

U p f u n c r e m a i n t i o n

N o t e : i f f u n c t i o n f u n c t i o n j o y s t i c k e n a b l e e n a b l e c o n t r o b u t t o n b u t t o n ll e r i s i s r i s e r e t u l e a s r n e e d , d t o c o d e c e n t e r

3 1 f l a p o s s h i n i t i g o n w i r e l e a s e d f i r s t , c o d e 3 6 f l a s h i n b ll g e f o r e a p p w i ll e a r .

I f u n t li s e l e c t e d a n o t h e r f u n c t i o n i s s e l e c t e d .

D o w n f u n c t i o n s e l e c t e d

N o t e : i f f u n c t i o n j o y s t i c k e n a b l e c o n t r o b u t t o n ll e r i s i s r e t u r n e r e l e a s e d , d c o t o d e c e n t e r

3 1 f l a p o s s h i n i t i g o n w i b e f o r e ll a p p e a r .

I f r f u n c t i o n e m a i n u e n n t li a b l e a n o b u t t o n t h e r i s r e l e f u n c t i o n a s e d i s s e l f i r s t , c e c t e d .

o d e 3 7 f l a s h i n g w i ll

D r i v e i n b l u e d i r e c t i o n f u n c t i o n s e l e c t e d

N o t e : i f f u n c t i o n f u n c t i o n j o y s t i c k e n a b l e e n a b l e c o n t r o b u t t o n b u t t o n ll e r i s i s r i s e r e t u l e a s r n e d e

, d t o c o d e c e n t e r

3 1 f l a p o s s h i n i t i g o n w i r e l e a s e d f i r s t , c o d e 3 8 f l a s h i n b ll g e f o r e a p p w i ll e a r .

r e m a i n u n t li a n o t h e r f u n c t i o n i s s e l e c t e d .

I f

K e y s w i t c h t o p l a t f o r m c o n t r o l

G r t o o u t h n e d c o n t r o l o n p o s i t i a o n n d

L i f t / d r i v e s w i t c h t o p l a d r i v e t f o p r m o s

E i t i o m n e r g e n c y S t o p b u t t o n s p u ll e d o u t

D

N r o i f u n v t c e e : t i i n i f y e ll o w j o y s t i c k o n e n a b l e d i r e c t i o n c b o u n t t t r o o n ll i e s r f u n c t i o n r i s r e l e e t u s a s e d e

, l e r n e d c o c t e d t o d e c e

3 n t

1 e r f l a p o s i t i o n s h i n g w i b e f o r e ll a p p e a r .

I f r f u n c t i o n e m a i n u e n n t li a b l e a n o b u t t o n t h e r i s r e l e f u n c t i o n a s e d i s s e l f i r s t , c e c t e d .

o d e 3 9 f l a s h i n g w i ll

K e y

G r s w o u n d i t c h t o p c o n t r o l l a a t f o r n d m p l c o a t f o n t r o r m l

E m e r g e n c y S t o p b u t t o n s p u ll e d o u t t o t h e o n

F u n c t i o n p o s i t i o n e n a b l e s w i t c h p r e s s e d .

H o r n

N o t e : s w i t c i s h b i s e

H o r n n i n w o t g i ll p r o e p s s e r e a p r e s s e d d t e i n .

w i t h o u t c o d e 4 0 f l a s h i n g i f f u n c t i o n e n a b l e






Fault Code Chart

(after Serial Number 17407)


Fault Code

18

42

43

45

46

47

52

53

54

55

56

57

58

68

— —

01

02

03

12


Normal operation

Machine will not operate. ECM cannot be reset.

EPROM not programmed

Platform ECM error

Defective control cable OR platfrom controls

Replace ECM

Troubleshoot cable OR platform controls

Undefined platform DIP switch settings

DIP switch settings incorrect Correct DIP switch settings

Chassis up/down switch closed

Malfunctioningup/down switch Troubleshoot up/down switch at start up

Pothole guard failure

Malfunctioning pothole switch

OR obstruction in pothole guard linkage

Troubleshoot pothole switch

OR remove obstruction.

Platform left turn switch closed at start up

Platform right turn switch closed at start up

Platform lift enable switch closed at start up

Platform drive enable switch closed at start up

Platform joystick off neutral at start up

Forward coil error

Reverse coil error

Up coil error

Down coil error

Malfunctioning steer left microswitch

Malfunctioning steer right microswitch

Malfunctioning lift enable switch

Malfunctioning drive enable switch

Joystick potentiometer not centered

Malfunctioning coil OR wire disconnected from coil



Troubleshoot steer left microswitch

Troubleshoot steer right microswitch

Troubleshoot lift enable switch

Troubleshoot drive enable switch

Verify potentiometer setting

Troubleshoot coil OR inspect wire connection




Right coil error

Left coil error

Brake coil error








Low Voltage Batteries discharged Charge batteries



Chart 1

All Functions

Will Not Operate

If the Error Indicator light is on at the platform controls, please refer to the specific chart that relates to the error code that is displayed on the

ECM.

Be sure the circuit breaker and fuse are not tripped or blown.

Be sure the batteries are properly connected.

Be sure the batteries are fully charged.

Be sure both

Emergency Stop buttons are pulled out to the

ON

position.

Turn keyswitch to the ground control and visually inspect the diagnostic display on the

ECM. Is the display blank or does it display a fault code?

displays a fault code

Refer to the fault code chart to find what chart is associated with your fault code OR consult

Genie Industries service department.

display is blank

Check voltage on input side of 275A fuse F2 inside battery module tray.

24V or more less than

24V

Charge batteries OR check battery condition and replace bad batteries OR check for short circuits OR check battery cables OR check for open in negative battery cable from batteries to ground point on module tray.

Check voltage on output side of 275A fuse F1 inside the battery module tray.

0V

24V

Replace 275A fuse F1.

Check continuity from Bterminal on curtis motor controller to the negative battery cable at the

Anderson plug.

no continuity

Repair open in negative battery cable from Bterminal on curtis motor controller to Anderson plug.

full continuity

Models before serial number 6901:

Check the voltage on the input side of the motor contactor K1.

Models after serial

number 6900: Check the voltage at the B+ terminal on the motor controller.

Continued on the next page.

24V

0V

Models before serial number 6901:

contactor K1.

Repair open in 24V supply cable from 275A fuse F1 to the Anderson plug

OR repair open in 24V supply cable from

Anderson plug to motor


number 6900: Repair open in 24V supply cable from 275A fuse F1 to Anderson plug OR repair open in 24V supply cable from

Anderson plug to the B+ terminal on the motor controller.



CHART 1

Continued from the previous page.


Check voltage at input side of 7A circuit breaker F2.

0V

24V

Models before serial

number 6901: Repair open in white wire from the input side of the motor contactor to the input side of the 7A circuit breaker (24f-ckt brkr to relay).


number 6900: Repair open in white wire from the Anderson connector to the input side of the

7A circuit breaker.

Check voltage at white wire at input side of

Emergency Stop button

S2.

24V

0V

Check voltage at input side of each contact at the key switch S2.

0V

24V

Repair open in white wire from output side of

7A circuit breaker OR reset or replace 7A circuit breaker.

Repair open in white wire from Emergency

Stop button to key switch OR repair open in white wire jumper to each contact OR replace contact on


OR replace Emergency

Stop button.

Turn key switch to ground control position and check output side of contact.

0V

24V

Check cam on key switch.

good

Replace contact OR refer to Ground Controls

Inoperative, Chart 6 OR consult Genie Industries

Service Department.

bad Repair or replace key switch.

5 - 10






CHART 1

Repair or replace key switch.

Turn key switch to platform control position and check output side of each contact.

0V

24V

Check cam on key switch.

good

Replace bad microswitch OR refer to

Platform Controls

Inoperative, Chart 5 OR consult Genie Industries

Service Department.

Refer to Chart 2, Pump

Motor Will Not Operate

OR repair open in white wire (C2 estop chassis)

OR consult Genie

Industries Service

Department.



Chart 2


Pump Motor

Will Not

Operatebefore serial number 6901




Activate lift function from the ground controls and check voltage at positive terminal on pump motor.

less than 24V

24V or more

Check voltage on B+ terminal on motor controller.

less than

24V

Replace positive battery cable from pump to B+ terminal on motor controller.

24V

Check continuity on ground cable from pump motor to M- terminal on motor controller.

no continuity

Replace ground cable on lift pump motor.

continuity

Check continuity from Bterminal on motor controller to the negative battery cable at the

Anderson plug (AP1).

no continuity

Replace negative cable from B- terminal on motor controller to the

Anderson plug.

continuity

Activate lift function and check voltage at terminal 1 on motor controller.

less than

24V

Repair open in white wire (26H) from the motor controller relay coil (K1) to the motor controller.

24V

Activate the lift function and check voltage at terminal 3 on the motor controller.

5V

0V

Repair open in white wire (A9-curtis terminal

3) from ECM to the motor controller OR replace the ECM OR consult Genie Industries

Service Department.

Activate the lift function and check voltage at Mterminal on the motor controller.

24V

0V

Replace pump motor

OR consult Genie

Industries Service

Department.

Replace the motor controller or contact

Genie Industries Service

Department.






CHART 2

Activate the lift function and check voltage on the output side of K1.

less than 24V

24V or more

Replace positive cable from K1 to the motor controller OR replace positive cable from the motor controller to the pump motor.

Activate the lift function and check voltage on the input side of K1.

0V

24V or more

Activate the lift function and check voltage on the white wire on the coil of K1.

0V

Repair open in wht wire

(A8-motor) from ECM to

K1 OR replace ECM OR conult Genie Industries

Service Department.

24V

Check continuity on the brn ground wire on the coil of K1 to the ground point on the chassis.

no continuity

Repair open in brown ground wire from K1 to the ground point on chassis.

continuity

Repair or replace K1.

Check voltage on the output side of the 275A fuse (F1).

0V

24V

Replace positive battery cables from output side of 275A fuse to the

Anderson plug OR replace positive battery cables from Anderson plug to K1 OR consult


Department.

Replace 275A fuse (F1)

OR replace positive cable from 275A fuse to the batteries OR consult


Department.



Chart 3


Pump Motor Will

Not Operate after serial number 6900




Activate the lift function from the ground controls and check voltage at positive terminal on pump motor.

less than 24V

24V or more

Check voltage on B+ terminal on the motor controller.

less than

24V

Replace positive battery cable from pump to B+ terminal on the motor controller.

24V

Check continuity on ground cable from pump motor to M- terminal on the motor controller.

no continuity Replace ground cable on lift pump motor.

continuity

Check continuity from Bterminal on the motor controller to the negative battery cable at the

Anderson plug (AP1).

no continuity

Replace negative cable from B- terminal on the motor controller to the

Anderson plug.

continuity


24V less than

24V

Repair open in white wire (A8-Motor) from the

ECM to terminal 1 on the motor controller.


5V

0V

Repair open in white wire (A9-motor controller terminal 3) from ECM to the potentiometer to the motor controller OR replace the potentiometer OR replace the ECM OR consult Genie Industries

Service Department.

Activate the lift function and check voltage at Mterminal on motor controller.

24V

0V

Replace pump motor

OR consult Genie

Industries Service

Department.

Replace curtis controller

OR consult Genie

Industries Service

Department.






CHART 3

Check voltage on the output side of the 275A fuse (F1).

0V

24V

Replace positive battery cables from output side of 275A fuse to

Anderson plug OR replace positive battery cables from Anderson plug to the B+ terminal on the motor controller

OR consult Genie

Industries Service

Department.

Replace 275A fuse OR replace positive cable from 275A fuse to the batteries OR consult


Department.



Chart 4

All Functions

Inoperative,

Power Unit

Starts and Runs


ECM.




Check hydraulic fluid level.

OK

Activate each machine function. Are all functions inoperative and the power unit still starts and runs?

yes low no

Fill with Dexron II equivalent hydraulic fluid.

Refer to the specific chart that relates to the inoperative function(s).

Connect a 0 to 5000 psi

(345 bar) pressure gauge to the test port on the function manifold.

Chock both sides of the drive wheels at the steer end of the machine.

Turn the keyswitch to platform control and pull out the Emergency Stop buttons out to the

ON position at both the ground and platform controls. Activate the drive forward function and check the pressure.

less than

3000 psi

Check for a positive connection between electric motor and pump by removing pump from motor, but leave all hoses connected. Visually check coupling connection.

more than

3000 psi

Re-adjust the system relief valve (GS-2046 &

2646 models) or the drive relief valve (Gs-

3246 models) OR valve(s) may be stuck open or closed OR function manifold may have an internal defect.

Consult Genie Industries

Service Department.

no good

Replace pump coupling

OR replace pump OR replace motor.

good

Test hydraulic pump.

See Repair section.

good


Service Department.

no good

Replace the pump.




Chart 5

Ground

Controls

Inoperative,

Platform

Controls

Operate

Normally


ECM.




Turn the keyswitch to ground control and make sure both


ON positon at both the ground and platform controls. Check voltage on the contact at the input side of the keyswitch at the ground controls (S2).

0V

24V or more

Check voltage at output side of contact.

0V

24V

Check voltage at the center terminal of the platform up/down toggle switch (S3) at the ground controls.

0V

24V

Test or replace platform up/down toggle switch

S3 (See Repair Section)

OR repair open in white wire from toggle switch to ECM (B12-up switch)

OR repair open in white wire from toggle switch to ECM (A12-down switch) OR consult


Department.

Repair open in white wire jumper from platform control contact to the ground control microswitch at the keyswitch (S2).

Check if key switch internal cam is activating ground control contact.

yes no

Replace key switch.

Replace key switch contact for ground controls.

Repair open in white wire jumper from keyswitch to center terminal on toggle switch.



Chart 6


Platform

Controls

Inoperative,

Ground

Controls

Operate

Normally


ECM.




Turn keyswitch to the ground control and visually inspect the diagnostic display on the

ECM. Does it display a fault code?

yes no

Turn keyswitch to platform control and make sure both


ON positon at both the ground and platform controls. Check voltage at the input side of the platform controls contact on the keyswitch at the ground controls (S2).

0V

24V or more

Check voltage at output side of contact.

0V

Refer to the fault code chart to find what chart is associated with your fault code OR consult

Genie Industries service department.

Repair open in white wire jumper from

Emergency Stop contact to the platform control contact at the keyswitch

(S2).

24V

Check if key switch internal cam is activating platform control contact.

yes no

Replace key switch.

Replace key switch contact for platform controls.

Check voltage at terminal A11 at the

ECM.

24V

0V

Check voltage at terminal B2 at the ECM.

0V

Repair open in white wire (A11-key switch) from keyswitch to A11 at

ECM.

Replace ECM.

24V






CHART 6

Turn keyswitch to platform controls and check voltage at terminal 4 on the main circuit board at the platform controls.

24V

0V

Check voltage at the input side of the

Emergency Stop button at the platform controls.

0V

24V

Check voltage at output side of platform

Emergency Stop button.

0V

24V

Check voltage at terminal 5 on the main circuit board at the platform controls.

0V

24V

Check voltage at terminal A4 at the ECM.

0V

24V

Replace coil cord assembly from the ECM to the platform controls.

Repair open in wire from terminal 4 on main circuit board to input side of Emergency Stop button.

Replace contact on


OR replace Emergency

Stop button.

Repair open in wire from terminal 5 on main circuit board to output side of Emergency Stop button.

Replace coil cord from

ECM to platform controls OR replace joystick controller OR replace main circuit board OR replace ECM

OR consult Genie

Industries Service

Department.

Replace ECM OR consult Genie Industries

Service Department.



Chart 7


Platform Up

Function

Inoperative

Be sure all other functions operate normally.




With key switch in platform position and both Emergency Stop buttons pulled out to the on position and the lift/ drive selector switch in the lift position, activate the controller in the up direction and check to see if the error indicator light at the platform controls is on.

light is on light is not on

Disconnect the wires from the platform up directional valve coil on function manifold

(item H) and check the resistance of the valve coil. See Repair Section.

0 or infinite ohms

18-20 ohms

Replace platform up directional valve coil

(item H).

Check continuity from the brown ground wire at the valve coil to ground.

continuity no continuity

Repair open in brown ground wire circuit from the platform up directional valve coil

(item H) to ground.

Repair open in white wire (A6-lift coil) from the platform up directional valve coil to the ECM (see Repair

Section) OR replace

ECM OR consult Genie

Industries Service

Department.

5 - 20

Install a 0 to 4000 PSI pressure gauge at the quick disconnect coupling on the function manifold and activate the platform up function.

3000

PSI or more less than 3000 PSI

Check for mechanical restrictions keeping platform up function from moving OR repair or replace the platform up directional valve cartridge (item H) OR repair or replace platform lift cylinder(s)

OR consult Genie

Industries Service

Department.

Adjust relief valve (see

Repair Section) OR repair or replace platform lift cylinder(s)

OR platform lowering valve(s) may be stuck open OR function manifold could have an internal defect. Consult


Department.



Chart 8

Platform Down

Function

Inoperative,

GS-2046 &

GS-2646





With key switch in platform position and the platform raised slightly and both Emergency

Stop buttons pulled out to the on position at both the ground and platform controls and the lift/drive switch in the lift position, activate the controller in the down direction and check to see if the error indicator light is on.

light is on

With the platform raised and the safety arm installed, label and disconnect the wires from the coil on the platform lowering valve

(item Q) at the platform lift cylinder and check the resistance. See

Repair Section.

0 or infinite ohms

Replace platform lowering valve coil

(item Q).

23 to 25 ohms


no continuity

Repair open in brown ground wire circuit from the platform lowering valve coil (item H) to ground.

continuity light is not on

With the platform raised and the safety arm removed, pull the manual platform lowering handle at the ground controls.

platform does not lower platform lowers

Repair open in white wire (B6-down coil) from the platform lowering valve coil (item Q) to the

ECM OR replace the

ECM OR repair or replace the platform lowering valve cartridge

(item Q) OR consult


Department.

Check for mechanical restrictions keeping platform from lowering

OR repair or replace the platform lowering valve cartridge (item Q) OR

0.059" orifice inside the cylinder is plugged OR repair or replace lift cylinder OR consult


Department.




CHART 8


Label and disconnect the wires from the lift/ drive toggle switch (S7) at the platform controls and troublshoot toggle switch (see Repair

Section).

good switch bad


OR repair or replace the platform lowering valve cartridge (item Q) OR

0.059" orifice inside the cylinder is plugged OR repair or replace lift cylinder OR replace platform controls OR replace ECM OR consult Genie Industries

Service Department.

Replace lift/drive toggle switch (S7).




Chart 9

Platform Down

Function

Inoperative,

GS-3246





With key switch in platform position and the platform raised slightly and both Emergency

Stop buttons pulled out to the on position at both the ground and platform controls and the lift/drive switch in the lift position, activate the controller in the down direction and check to see if the error indicator light is on.


With the platform raised and the safety arm installed, label and disconnect the wires from each coil on the platform lowering valves

(item Q) at the platform lift cylinders and check the resistance of each valve coil. See Repair

Section.

0 or infinite ohms

Replace defective platform lowering valve coil (item Q).

23 to 25 ohms

Check continuity from the black ground wire at the valve coil to ground.

no continuity

Repair open in ground wire circuit from the platform lowering valve coil (item Q) to ground.

continuity

With the platform raised and the safety arm removed, push the manual platform lowering button at the ground controls.

platform does not lower platform lowers

See Chart 18 OR check for mechanical restrictions keeping platform from lowering

OR repair or replace the platform lowering valve cartridge(s) (item Q) OR

0.059" orifice inside the cylinder(s) is plugged

OR repair or replace lift cylinder(s) OR consult


Department.

Repair open in white wire (B6-down coil) circuit from the ECM to the platform lowering valve coil (item Q) on the lower cylinder to the platform lowering valve coil (item Q) on the upper cylinder OR repair open in brown ground wire circuit from platform lowering valve coils to ground OR repair or replace the platform lowering valve cartridge

(item Q) OR replace


Industries Service

Department.




CHART 9


Label and disconnect the wires from the lift/ drive toggle switch (S7) at the platform controls and troublshoot toggle switch (see Repair

Section).

good switch bad


OR repair or replace the platform lowering valve cartridge(s) (item Q) OR

0.059" orifice inside the cylinder(s) is plugged

OR repair or replace lift cylinder(s) OR replace platform controls OR replace ECM OR consult Genie Industries

Service Department.

Replace lift/drive toggle switch (S7).




Chart 10

Steer Left

Function

Inoperative





With key switch in platform position and both Emergency Stop buttons pulled out to the on position, activate the steer rocker switch in the left direction and check to see if the error indicator light at the platform controls is on.


Disconnect the wires from the coil on the steer left directional valve on the function manifold (item G) and check the resistance of the valve coil. See

Repair Section.

0 or infinite ohms

Replace the coil.


26 to 28 ohms no continuity

Repair open in brown ground wire circuit from the steer left directional valve coil (item G) to ground.

continuity

Repair open in white wire (B7-left coil) from the coil on the steer left directional valve

(item G) to the ECM OR repair open in brown ground wire circuit from the steer left directional valve (item G) to ground

OR replace ECM OR consult Genie Industries

Service Department.

Activate steer left function. Does the hydraulic power unit turn on?

no yes

Check continuity of steer microswitch.

bad good

Check for wire continuity from the steer microswitch to the terminal strip OR replace main circuit board at the platform controls.

Replace steer left/right micro switch inside drive controller.




CHART 10


Install a 0 to 2000 PSI pressure gauge at the quick disconnect coupling on the function manifold and activate the steer left function and check the pressure.

1500

PSI less than 1500 PSI

Re-adjust the steer relief valve (see Repair

Section) OR repair or replace steer cylinder

OR replace steer left/ right valve cartridge

(item G) OR function manifold could have an internal defect. Consult


Department.

Check for mechanical restrictions keeping steer left function from operating OR repair or replace steer cylinder

OR consult Genie

Industries Service

Department.




Chart 11

Steer Right

Function

Inoperative





With key switch in platform position and both Emergency Stop buttons pulled out to the on position, activate the steer rocker switch in the right direction and check to see if the error indicator light at the platform controls is on.


Disconnect the wires from the coil on the steer right directional valve on the function manifold (item G) and check the resistance of the valve coil. See

Repair Section.

0 or infinite ohms

Replace the coil.


26 to 28 ohms no continuity

Repair open in brown ground wire circuit from the steer right directional valve coil (item G) to ground.

continuity

Repair open in white wire (C7-right coil) from the coil on the steer right directional valve

(item G) to the ECM OR repair open in brown ground wire circuit from the steer right directional valve (item G) to ground

OR replace ECM OR consult Genie Industries

Service Department.

Activate steer right function. Does the hydraulic power unit turn on?

no yes

Check continuity of steer microswitch.

bad good

Check for wire continuity from the steer microswitch to the terminal strip OR replace main circuit board at the platform controls.

Replace steer left/right micro switch inside drive controller.




CHART 11


Install a 0 to 2000 psi

(0 to 138 bar) pressure gauge at the quick disconnect coupling on the function manifold and activate the steer right function and check the pressure.

1500 psi less than 1500 psi

Re-adjust the steer relief valve (see Repair

Section) OR repair or replace steer cylinder

OR replace steer left/ right valve cartridge

(item G) OR function manifold could have an internal defect. Consult


Department.

Check for mechanical restrictions keeping steer right function from operating OR repair or replace steer cylinder

OR consult Genie

Industries Service

Department.




Chart 12

All Drive

Functions

Inoperative, All

Other Functions

Operate

Normally


ECM.




With key switch in platform position and both Emergency Stop buttons pulled out to the on position at both the ground and platform controls, activate drive forward and drive reverse functions.

Check to see if the green indicator light is flashing at the platform controls.

light is flashing

Reset the ECM by pushing in the platform

Emergency Stop button to the off position, switch the lift/drive selector switch to the drive position and pull the

Emergency Stop button up to the on position.

Check the lights at the platform controls.

error indicator light is on

Refer to chart(s) that are related to the error code that is displayed on the


Industries Service

Department.

green light is flashing

Replace lift/drive toggle switch S7.

light is not flashing

Test the lift/drive toggle switch S7 (see Repair

Section).

bad good

Replace main circuit board in the platform controls OR replace


Industries Service

Department.

Is the error indicator light on at the platform controls?

yes no

Refer to chart(s) that are related to the error code that is displayed on the


Industries Service

Department.

Activate the drive forward or drive reverse function. Does the hydraulic power unit turn on?

no

Replace joystick controller OR replace main circuit board OR replace ECM OR consult Genie Industries

Service Department.

yes




CHART 12


Chock both sides of the steer end drive wheels.


(0 to 345 bar) pressure gauge to the test port on the function manifold.

Activate the drive function in either the forward or reverse direction and check the pressure.

3500 psi less than

3500 psi

See Chart 13, Brake

Release Function

Inoperative.

Repair or replace drive forward/reverse valve cartridge (item K) OR rebuild or replace drive motors OR function manifold may have an internal defect. Consult


Department.




Chart 13

Brake Release

Function

Inoperative


ECM.




Chock the wheels at the steer end and raise the non-steer end of the machine up approximately 4 inches

(10.2 cm) and place jack stands under the machine for support.

Turn the brake release knob (item N) counterclockwise all the way and pump the hand pump fully 13-15 times or until much resistance is felt. Turn each wheel by hand. Each wheel should turn freely without much effort.

wheels turn freely

Turn the brake release valve (item N) clockwise all the way and try to rotate the wheels.

wheels do not turn

Attempt to drive the machine in either direction and have someone try to rotate the non steer wheels

(This will require 2 people).

wheels turn wheels turn

Rebuild or replace the brakes OR replace the brake release valve

(item N) OR consult


Department.

Brake release function is operating correctly. If problems still exist consult Genie Industries

Service Department.

wheels do not turn wheels do not turn Plumb a 0 to 500 psi

(34.5 bar) into the hose from the function manifold to the brake.

Attempt to drive the machine in either direction and read the pressure on the gauge.

200 to

300 psi

Pressure is good.

Replace brakes OR consult Genie Industries

Service Department.

less than

200 psi

Replace shuttle valve

(item O) OR replace brake release valve

(item N) OR function manifold or brake release manifold may have an internal defect

OR consult Genie

Industries Service

Department.



Chart 14


Drive Forward

Function

Inoperative





With key switch in platform position and both Emergency Stop buttons pulled out to the on position at both the ground and platform controls, activate drive controller in the forward direction and check to see if the error indicator light at the platform controls is on.


Replace the drive forward/reverse valve cartridge (item K) OR consult the Genie

Industries Service

Department..

Disconnect the wire from the drive forward directional valve coil

(item K) and check the resistance. See Repair

Section.

18 to 20 ohms


0 or infinite ohms

Replace drive forward directional valve coil

(item K).

no continuity

Repair open in brown ground wire circuit from the drive forward directional valve coil

(item K) to ground.

continuity

Repair or replace drive forward directional valve

(item K) OR repair open in wht wire (C-6 forward coil) OR repair open in brown ground wire circuit from the drive forward directional valve to ground OR consult


Department.



Chart 15

Drive Reverse

Function

Inoperative





With key switch in platform position and both Emergency Stop buttons pulled out to the on position at both the ground and platform controls, activate drive controller in the reverse direction and check to see if the error indicator light at the platform controls is on.


Replace the drive forward/reverse valve cartridge (item K) OR consult the Genie

Industries Service

Department.

Disconnect the wire from the drive reverse directional valve coil

(item K) and check the resistance. See Repair

Section.

18 to 20 ohms


0 or infinite ohms

Replace drive reverse directional valve coil

(item K).

no continuity

Repair open in brown ground wire circuit from the drive reverse directional valve coil

(item K) to ground.

continuity

Repair or replace drive reverse directional valve

(item K) OR repair open in wht wire (A-7 reverse coil) OR repair open in brown ground wire circuit from the drive reverse directional valve to ground OR consult


Department.



Chart 16


Machine Will

Not Drive At

Full Speed




Be sure that the drive speed select switch is in the down position.

With key switch in platform position and both Emergency Stop buttons pulled out to the

ON

position at both the ground and platform controls, and the platform in the stowed position, drive the machine in either direction. Is the error indicator light on at the platform controls?

light is on

Check voltage at white wire (39C-pothole sw) at

S5.

0V

24V

Raise the platform approximately 3 feet

(0.9 m) and check voltage at output side of

S5.

24V

Check voltage on input side of S6.

0V

0V

24V light is not on

Check voltage on output side of S6.

0V

24V

Repair open in wht wire

(B10-pothole sw) from the output side of S6 to the ECM OR replace


Industries Service

Department.

Repair open in white wire (39C-pothole sw) from S5 to multi-function alarm to keyswitch.

Adjust limit switch S5 so pothole arm activates switch OR replace limit switch contact OR replace limit switch S5.

Repair open in white wire jumper (21Bpothole jumper) from output side of S5 to input side of S6.

Adjust limit switch S6 so pothole arm activates switch OR replace limit switch contact OR replace limit switch S6.

5 - 34






CHART 16

Chock both sides of the steer end drive wheels.


(0 to 345 bar) pressure gauge to the test port on the function manifold.

Drive the machine in either the forward or reverse direction and check the pressure.

less than

3500 psi

Re-adjust drive relief valve (see Repair

Section) OR replace drive relief valve

(item F) OR rebuild or replace drive motors OR function manifold may have an internal defect.


Service Department.

3500 psi

Raise the steer end of machine up approximately 4 inches

(10.2 cm) and place jack stands under the machine for support.

With the lift/drive selector switch in the drive position, move the joystick controller to the full speed forward or reverse position.

both wheels move

Repair open in white wire (B10-pothole switch) from output side of S6 to ECM OR replace ECM OR see

Chart 13, Brake Release

Function Inoperative.

one or both wheels do not move

Repair or replace drive motor(s) OR consult


Department.



Chart 17

Machine

Drives At

Full Speed

With Platform

Raised


ON

position at both the ground and platform controls and the platform in the stowed position, drive the machine in either direction. Is the error indicator light on at the platform controls?

light is on

Remove obstruction from pothole guard or from pothole guard limit switches OR consult


Department.

light is not on Consult Genie Industries

Service Department.




Manual

Platform

Lowering

Function

Inoperative -

GS-2046 &

GS-2646

Be sure the platform lowering cable is not kinked or pinched.

Be sure the platform lowers using the platform up/down toggle switch at the ground controls.


Chart 18

Check the adjustment of the manual platform lowering cable. See 4-1 in the Repair Section,

How to Adjust the

Manual Platform

Lowering Cable. Is the adjustment correct?

no yes

See Chart 7 OR check for mechanical restrictions keeping manual platform lowering function from operating OR replace the manual platform lowering cable OR see

OR consult Genie

Industries Service

Department.

Re-adjust the manual platform lowering cable and check the manual platform lowering function.

If manual platform lowering function is still inoperative, see Chart 7

OR consult Genie

Industries Service

Department.



Chart 19

Manual

Platform

Lowering

Function

Inoperative -

GS-3246

Be sure the wiring to the platform lowering valves on the cylinders is not kinked or pinched.

Be sure the platform lowers using the platform up/down toggle switch at the ground controls.



With the platform raised and the safety arm installed, connect the positive lead from a voltmeter to the wht wire on the lower lift cylinder solenoid valve and the negative lead of the volt meter to the brown ground wire on the hour meter. Activate the manual platfrom lowering button and check the voltage at the solenoid valve on the lower cylinder.

24V less than 24V

Remove the cover from the ground controls, then activate the manual platfrom lowering button and check the voltage on the wht wire at terminal #4 on the manual platform lowering button.

24V less than 24V

Check the voltage on the wht wire at terminal

#3 on the manual platform lowering button.

24V less than 24V

Activate the manual platfrom lowering button and check the voltage on the wht wire at the solenoid valve on the upper cylinder.

contact.

less than 24V

Repair open in wht wire from the solenoid valve on the lower lift cylinder to the solenoid valve on the upper cylinder.

Repair open in wht wire from terminal #4 at the manual platform lowering button to the solenoid valve on the lower lift cylinder.

Replace the manual platform lowering button

Check continuity to ground from the blk wire on the manual platform lowering battery that connects to the brown wire on the hour meter.

continuity no continuity

Replace the diode on the wht wire from the

Emergency Stop button to the manual lowering button and re-charge the manual platform lowering batteries OR replace the batteries.

Repair open in ground wire circuit from the blk wire at the manual platform lowering batteries through the brown wire to the hour meter then to ground.

24V


OR replace the solenoid valves on both lift cylinders OR the 0.059" orifice inside each lift cylinder may be plugged.



Drive

Function

Overspeeds

While Driving

Down An

Incline,

GS-3246 Only






Chart 20


ON

position at both the ground and platform controls, activate drive controller in the forward direction down a slight incline. Does the machine overspeed?

yes no

The machine should be functioning normally. If not, consult Genie

Industries Service

Department.

Adjust the Back

Pressure Relief Valve

(item L) (see repair section).



Chart 21

Drive

Function

Hesitates

While

Steering,

GS-3246

Only

With key switch in platform position and the

Emergency Stop buttons pulled out to the

ON position at both the ground and platform controls, and the steer wheels turned fully to the right, activate drive controller in the forward direction. Does the drive function hesitate?

yes no

The machine should be functioning normally. If not, consult Genie

Industries Service

Department.

Adjust the Back

Pressure Relief Valve

(item L) (see repair section).







Service Manual - First Edition Section 6 - Schematics

Schematics


Troubleshooting and repair procedures shall be completed by a person trained and qualified on the repair of this machine.



Before Troubleshooting:

Read, understand and obey the safety rules and operating instructions printed in the


GS-2646 & Genie GS-3246 Operator's Manual.

Be sure that all necessary tools and test equipment are available and ready for use.


There are two groups of schematics in this section. An illustration legend precedes each group of drawings.

Electrical Schematics

Electrocution hazard. Contact with electrically charged circuits may result in death or serious injury. Remove all rings, watches and other jewelry.

Hydraulic Schematics


General Repair Process

Malfunction discovered

Identify symptoms

Troubleshoot problem still exists

Return to service problem solved

Inspect and test

Perform repair


Section 6 - Schematics

Electrical Components


Item Description Genie

Part Number

Manufacturer Manufacturer

Part Number

Qty

AP1 ................ Anderson connector ............ 19436 ............. Anderson ............................. 6325-G1 ......................... 2

B1 ................... Alarm, steady tone .............. 39540 ............. Floyd Bell Inc. ...................... UC-09628-Q .................. 1

B2 ................... Alarm, intermittent ............... 18963 ............. Floyd Bell Inc. ...................... XB-09-630-Q .................. 1

F1 ................... Fuse, 275 amp .................... 40833 ............. Buss ..................................... ANN-275 ........................ 2

F2 ................... Circuit breaker ..................... 47811 ............. ETA ...................................... 45-700-IG1-P10 ............. 2

FB1 ................ Flashing beacon .................. 39676 ............. ECCO Electronic Controls ... 6220A ............................. 2

G1 .................. Battery, 225AH, 6V DC ....... 62201 ............. Allied Battery Co.. ................ GC2B, dry ...................... 4

G2 .................. Battery, 0.8AH, 12V DC ...... 55350 ............. Yuasa ................................... NP0.8-12 ........................ 2

H1 .................. Hourmeter ............................ 56100 ............. Curtis Instruments ............... 17305666 ....................... 1

P2 ................... Level sensor, Dual Axis ....... 40836 ............. Power Comp. of Midwest .... L36 ................................. 1

S1 ................... Contact, N.C. ....................... 33020 ............. Square D .............................. 1863 ............................... 1

S2, S12 .......... Contact, N.O. ....................... 45081 ............. Telemecanique .................... ZB2-BE101 .................... 5

S3 ................... Toggle switch, SPDT

3 position momentary .......... 13037 ............. Microswitch Control Inc. ...... 1NT1-7 ........................... 1

S4, S5, S6

S11 ................. Contact - limit switch,

N.C.H.O. .............................. 19491 ............. Telemecanique .................... XESP2151 ..................... 4

S7, S8 ............ Toggle switch, DPDT

2 position maintained .......... 44987 ............. ITT Schadow. ...................... 220536 ........................... 2

S9 ................... Contact, N.C. ....................... 44990 ............. Telemecanique .................... ZA2-BZ1026 ................... 1

S10 ................. Contact, N.O. ....................... 44989 ............. Telemecanique .................... 220518 ........................... 1

U2 .................. Motor controller,

275 amp .............................. 39472 ............. Curtis Instruments ............... 1204-036 ........................ 1

Y2, Y3, Y4 ...... Coil, 20V DC

(size 8) with diode ................ 39347 ............. Hydra Power Systems ......... 6309757 ......................... 3

Y1, Y5, Y6,

Y8 ................... Coil, 20V DC

(size10) with diode ............... 44176 ............. Hydra Power Systems ......... 6359752 ......................... 4

Y7 ................... Coil, 20V DC ........................ 44787 ............. Hydra Power Systems ......... 10166-25 ........................ 3






Module Tray Legend





Module Tray Legend

(after serial number 6900)



Electrical Symbols Legend



6

7

8

4

5

2

3

1


Electrical Schematic


A B C D

Service Manual

E F G H I J K L M N


N M L K J I H G F

Service Manual

E D


C



B A

1

2

5

6

3

4

7

8


Service Manual




7

8

5

6

2

3

4



(from serial number 6901 to 8931)

A B C

1

D

Service Manual

E F G H I J K L M N


N M L K J I H G F

Service Manual

E D




C B A

1

7

8

5

6

2

3

4


Service Manual Section 6 - Schematics



7

8

5

6

2

3

4




A B C

1

D

Service Manual

E F G H I J K L M N


N M L K J I H G F

Service Manual

E D




C B A

1

7

8

5

6

2

3

4





7

8

5

6

2

3

4




A B

1

C D

Service Manual

E F G H I J K L M N


N M L K J I H G F

Service Manual

E D


C



B A

1

7

8

5

6

2

3

4






Ground Controls and Level Sensor Box Legend



Platform Controls Legend





Platform Controls Legend




Hydraulic Symbols Legend



N M L K J I H G F

Service Manual

E D


C

Hydraulic Schematic


B A

1

6

7

8

4

5

2

3





N M L K J I H G F

Service Manual

E D


C



B A

1

6

7

8

4

5

2

3





Service Manual - First Edition Section 7 - Repair Procedures

Repair Procedures


Repair procedures shall be completed by a person trained and qualified on the repair of this machine.



Before Repairs Start:

Read, understand and obey the safety rules and operating instructions in the

Genie GS-2032

& Genie GS-2046 & Genie GS-2646 & Genie

GS-3246 Operator's Manual.

Be sure that all necessary tools and parts are available and ready for use.

Read each procedure completely and adhere to the instructions. Attempting shortcuts may produce hazardous conditions.

Unless otherwise specified, perform each repair procedure with the machine in the following configuration:


· Platform in the stowed position


OFF

position with the key removed

· Wheels chocked


Most of the procedures in this section should only be performed by a trained service professional in a suitably equipped workshop. Select the appropriate repair procedure after troubleshooting the problem.

Perform disassembly procedures to the point where repairs can be completed. Then to re-assemble, perform the disassembly steps in reverse order.

Symbols Legend







Indicates that a specific result is expected after performing a series of steps.


b c d e f

Section 7 - Repair Procedures

Platform Controls


1-1

Platform Controller

The platform controller is controlled by an ECM

(Electronic Control Module) located in the power unit module tray. The ECM aids in troubleshooting by recognizing machine malfunctions and displaying fault codes on an LED screen on the

ECM. See the Troubleshooting section of this manual for a list of fault codes and additional information. The ECM is not user-serviceable. The joystick controller is calibrated at the factory and does not need to be adjusted. For further information or assistance, consult the Genie

Industries Service Department.





a a b c

7 - 2 d a Main circuit board b Lift/drive selector toggle switch c Horn button f d Emergency stop button e LED circuit board

Joystick controller a Main circuit board b Emergency stop button c Joystick controller d Alarm



PLATFORM CONTROLS

1-2

Software Configuration

The ECM (Electronic Control Module) contains programming for all configurations of the Genie GS-

2046 & Genie GS-2646 & Genie GS-3246. The platform controls can be adjusted to a different configuration by changing the combination of the

DIP switch settings. The DIP switch is located on the circuit board inside the platform control box.

DIP switches have two positions -

ON

or

OFF

. When reading the DIP switch code in the DIP Switch

Codes Chart on page 7-5, the

ON

and

OFF

are represented by the numbers 1 (

ON

) and 0 (

OFF

).


Machines manufactured before serial number 17408 are not adjustable. If your ECM has been replaced, or if the machine serial number is after 17407, you can verify the revision level of the ECM by using the following procedure:

How to Determine the Revision

Level

1 Remove the platform controls from the platform.

2 Turn the key switch to platform control and pull out the Emergency Stop buttons to the


3 Press and hold the lift enable button and the function enable switch. Move the joystick handle to the

UP

position to raise the platform.

Observe the code shown in the LED display window, located on the battery pack side of the machine.

Result: The configuration code of the DIP switch will appear in the LED display window.

4 Press and hold the lift enable button and the function enable switch. Move the joystick handle to the

DOWN

position to lower the platform. Observe the code shown in the LED display window, located on the battery pack side of the machine.

Result: The software revision level will appear in the LED display window. If revision level "b0" or later appears in the display window, the following procedures will apply. If revision level

"A0" is displayed, the following procedures will not apply.


OFF position at both the ground and platform controls and turn the key switch to the

OFF position.


Section 7 - Repair Procedures Service Manual - First Edition

PLATFORM CONTROLS

1-3

How to Set the DIP Switch

Codes

Tip-over hazard. Do not adjust the

DIP switch settings to other than what is specified in this procedure.

Exceeding specifications will cause death or serious injury.

If replacing the circuit board, note the individual switch positions on the DIP switch. Set the individual switches on the new circuit board to the same configuration as the old one.

If replacing the circuit board, use dielectric grease on all plug-in connectors.


OFF position at the ground and platform controls.

Turn the key switch to the

OFF

position.

2 Remove the fasteners securing the top of the controller to the controller case.

a b f c d e

3 Rotate the platform controller box in the position shown to correctly identify the configuration of the DIP switch settings.

4 Open the controller box lid and locate the DIP switch on the circuit board. Move the DIP switch settings to correspond with the configuration of the machine options, indicated in the DIP Switch Code Chart.

5 Confirm the settings. See 1-3,

How to Determine the Revision Level.

6 Cover the DIP switch with dielectric grease.

7 Close the lid and install the fasteners.


OFF position at both the ground and platform controls and turn the key switch to the

OFF

position.

Any change in DIP switch settings will not take effect until the key switch is truned to the

OFF

position.

7 - 4 f a DIP switch b Emergency stop button c Circuit boards d Joystick controller e Controller box

Enlarged view of DIP switch



DIP Switch Code Chart

A mark in the column indicate that the machine configuration includes this option.

Diagnostic

Display

Code

Dip Switch

Code

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

38

39

40

41

42

32

33

34

35

36

37

43

44

45

46

47

48

10000000

10000100

10001000

10010000

10100000

11000000

•

10001100

•

•

•

10010100

10100100

11000100

•

10011100

10101100

•

•

• •

•

•

• • •

•

11001100

•

10110100

11010100

•

•

• •

•

• •

• •

•

•

11100100

• •

10111100

• • • •

•

11011100

•

11101100

• •

• •

•

•

•

11110100

• • • •

•

11111100

• • • • •

10011000

• •

10101000

•

11001000

• •

•

10111000

11011000

•

10110000

•

• •

•

• •

11101000

• •

11111000

• • • •

•

•

11010000

•

11110000

• • •

•

11100000

• •

PLATFORM CONTROLS

DIP Switch Function Definitions

Motion Beacon: The motion beacon option flashes only when operating a function.

Motion Alarm: The motion alarm will beep when operating any function.

Lift/Drive Cut Out: This cuts out lift and drive functions when the machine goes out of level.

Required for Europe and Australia.

Overload Cut Out: This cuts out lift when the cylinder is overloaded. Required for France.

Descent Delay: This option halts descent for 4 seconds at approximately 6 feet (2 m).

Required for Europe.



PLATFORM CONTROLS

1-4

Toggle Switches

Toggle switches used for single function switching are single pole double throw (SPDT) switches.

Dual function switching requires a double pole double throw (DPDT) switch.

How to Test a Toggle Switch

Continuity is the equivalent of 0 to

3 ohms. A simple continuity tester may not accurately test the switch.

This procedure covers fundamental switch testing and does not specifically apply to all varieties of toggle switches.


OFF

position. Tag and disconnect all wiring from the toggle switch to be tested.

The toggle switch at the platform controls requires that the wires are unplugged from the main circuit board before testing.

2 Connect the leads of an ohmmeter to the switch terminals in the following combinations listed below to check for continuity.

Left Center

Right

Test

Left position

terminal 1 to 2, 3, 4, 5 & 6 terminal 2 to 3 terminal 2 to 4, 5 & 6 terminal 3 to 4, 5 & 6 terminal 4 to 5 & 6 terminal 5 to 6

Center position

Right position

terminal 1 to 2 terminal 1 to 3, 4, 5 & 6 terminal 2 to 3, 4, 5 & 6 terminal 3 to 4, 5 & 6 terminal 4 to 5 terminal 4 to 6 terminal 5 to 6

Desired result

no continuity

(infinite

Ω) continuity

(zero

Ω) no continuity no continuity no continuity continuity

There are no terminal combinations that will produce continuity

(infinite

Ω) continuity

(zero

Ω) no continuity

(infinite

Ω) no continuity no continuity continuity no continuity no continuity

1

2

3

Single pole double throw

(SPDT)

Double pole double throw

(DPDT)

1 2

4 5

3

6

1 2 3

7 - 6

1

2

3

1 2

4 5

3

6

1

2

3

1 2

4 5

3

6

1 2 3 1 2 3



Platform Components

2-1

Platform

How to Remove the Platform

Perform this procedure with the platform extension fully retracted and locked in position.

1 Lower the platform to the stowed position and turn the machine off.

2 Remove the retaining fastener that holds the platform controls quick disconnect plug to the bottom of the platform toeboard.

3 Twist to disconnect the plug from the platform controls.

4 Remove the cover to the AC outlet. Label and disconnect the wiring from the outlet.

Electrocution hazard. Contact with electrically charged circuits may result in death or serious injury.


5 Pull the wiring through the platform tube.

If your machine is equipped with an air line to platform option, the air line must be disconnected from the platform before removal.

6 Support the platform with a forklift at the non-steer end. Do not lift it.

7 Attach a strap from the platform railings to the carriage on the forklift to help support the platform.

8 Remove the retaining fasteners from the scissor platform pivot pins at the steer end of the machine.

9 Use a slide hammer to remove the pins.

Crushing hazard. The platform will fall if it is not properly supported.

10 Remove the plug from the access hole on each side of the platform.

11 Lift the platform slightly to clear the scissor arms and slide the platform towards the nonsteer end of the machine until the non-steer end platform pivot pins are visible through the access holes in the side of the platform.

12 Remove the retaining fasteners from the scissor platform pivot pins at the non-steer end of the machine.

13 Use a slide hammer to remove the pins.

Crushing hazard. The platform may may become unbalanced and fall when it is removed from the machine if it is not properly supported and secured to the forklift.

14 Carefully lift the platform off of the machine and place it on a structure capable of supporting it.

Note the position of the wear pads before the platform is removed so that when the platform is installed they will be in the correct position.



PLATFORM COMPONENTS

2-2

Platform Extension

How to Remove the

Platform Extension


2 Extend the platform approximately 3 feet (1 m).

3 Remove the platform controls from the platform and lay them off to the side of the machine.

4 Support the platform extension with a forklift at the steer end. Do not lift it.

5 Attach a strap from the platform extension railings to the carriage on the forklift to help support the platform extension.

6 Remove the mounting fasteners from the platform extension roller support on both sides of the machine at the non-steer end of the platform extension. Remove the roller supports.

7 Carefully slide the platform extension out from the platform and place it on a stucture capable of supporting it.

How to Replace the Platform

Extension Wear Pads

1 Remove the Platform Extension. See 2-2, How to Remove the Platform Extension.

2 Drill out the rivets which hold the wear pads in place.

3 Install the new wear pad using new rivets.

When installing new rivets, make sure the rivet heads are not above the surface of the wear pad.






Scissor Components


Steer End

1 Number 4 pivot pin (steer end)

2 Number 3 center pivot pin

3 Lift cylinder rod-end pivot pin


5 Number 2 center pivot pin (2pins)



8 Number 1 inner arm

9 Number 1 pivot pin (steer end) (2pins)

7 - 10 Genie GS-2046 & Genie GS-2646 & Genie GS-3246

Non-steer End

10 Number 4 pivot pin (non-steer end)


12 Number 3 outer arm





17 Lift cylinder barrel-end pivot pin


Part No. 48339


SCISSOR COMPONENTS, GS-2046

3-1

Scissor Assembly

How to Disassemble the


GS-2046

Bodily injury hazard. This procedure requires specific repair skills, lifting equipment and a suitable workshop. Attempting this procedure without these skills and tools could result in death or serious injury and significant component damage. Dealer service is required.

When removing a hose assembly or fitting, the O-ring on the fitting and/or hose end must be replaced and then torqued to specification during installation. Refer to Section

Two, Hydraulic Hose and Fitting

Torque Specifications.

1 Remove the platform. See 2-1, How to Remove the Platform.

2 Remove the cables from the side of the number

3 outer arm (index #12) at the ground controls side.


Cables can be damaged if they are kinked or pinched.

3 Attach a lifting strap from an overhead crane to the number 3 outer arm (index #12).

4 Remove the external snap rings from the number 3 center pivot pin (index #2).

5 Use a soft metal drift to remove the number 3 center pivot pin (index #2).

6 Remove the external snap rings from the number 3 pivot pin (index #13).

7 Use a soft metal drift to remove the number 3 pivot pin (index #13) from the non-steer end of the machine. Remove the number 3 outer arm

(index #12) from the machine.

Crushing hazard. The number 3 outer arm (index #12) may become unbalanced and fall if not properly supported when it is removed from the machine.

8 Remove the cable clamps from the number 3 inner arm (index #11).

9 Remove the mounting fasteners from the cable tray support at the steer end.

10 Remove the external snap rings from the number 2 center pivot pin (index #5) at the ground controls side. Do not remove the pin.

11 Slide the cable tray towards the battery pack side of the machine and remove it from the machine.



12 Attach a lifting strap from an overhead crane to the lug on the rod end of the lift cylinder.

13 Remove the pin retaining fasteners from the cylinder rod-end pivot pin (index #3). Use a soft metal drift to remove the pin.

Bodily injury hazard. The cylinder may fall if not properly supported when the pin is removed.




14 Lower the cylinder onto the number 1 center pivot pin (index #7).

15 Attach a lifting strap from an overhead crane to the number 3 inner arm (index #11).


17 Use a soft metal drift to remove the number 3 pivot pin (index #4). Remove the number 3 inner arm (index #11) from the machine.

Bodily injury hazard. The number

3 inner arm (index #11) may become unbalanced and fall if not properly supported when it is removed from the machine.

18 Attach a strap from an overhead crane to the number 2 outer arm (index #15) at the ground controls side.

19 Use a soft metal drift to remove the number 2 center pivot pin (index #5) at the ground controls side.

20 Remove the external snap rings from the number 2 pivot pin (index #16) at the non-steer end.

21 Use a soft metal drift to remove the number 2 pivot pin (index #16) at the non-steer end.

Remove the number 2 outer arm (index #15) from the ground controls side of the machine.


2 outer arm (index #15) at the ground controls side may become unbalanced and fall if not properly supported when it is removed from the machine.

22 Attach a lifting strap from an overhead crane to the number 2 outer arm (index #15) at the battery pack side.

23 Remove the external snap rings from the number 2 center pivot pin (index #5) at the battery pack side.

24 Use a soft metal drift to remove the number 2 center pivot pin (index #5) at the battery pack side. Remove the number 2 outer arm (index

#15) from the battery pack side of the machine.

Bodily injury hazard. The number 2 outer arm (index #15) at the battery pack side may become unbalanced and fall if not properly supported when it is removed from the machine.


26 Remove the external snap rings from the number 2 pivot pin (index #6) from the steer end of the machine.



2 outer arm (index #15) at the battery pack side may become unbalanced and fall if not properly supported when it is removed from the machine.

28 Remove the safety arm from the number 2 inner arm (index #14) that was just removed.




29 Attach a lifting strap from an overhead crane to the number 1 inner arm (index #8) at the nonsteering end.

30 Raise the number 1 inner arm (index #8) approximately 2 feet (0.6 m) and insert the safety arm between the number 1 inner arm

(index #8) and the number 1 outer arm (index

#18). Lower the scissor arms onto the safety arm.

Bodily injury hazard. Keep hands clear of moving parts when inserting the safety arm.

31 Disconnect and plug the hydraulic hose on the lift cylinder. Cap the fitting on the cylinder.


32 Tag and disconnect the wires from the solenoid valve on the cylinder.

33 Attach a lifting strap from an overhead crane to the lug on the rod end of the lift cylinder. Raise the lift cylinder to a vertical position.

34 Remove the pin retaining fasteners from the lift cylinder barrel-end pivot pin (index #17). Use a soft metal drift to remove the pin. Remove the cylinder from the machine.

Crushing hazard. The cylinder may become unbalanced and fall when it is removed from the machine if it is not properly attached to the overhead crane.

Component damage hazard. Be careful not to damage the valve or fittings on the cylinder while removing it from the machine.

35 Place a 4 x 4 x 48 inch (10 x10 x122 cm) long block across both sides of the chassis under the number 1 center pivot pin (index #7).

36 Attach a lifting strap from an overhead crane to the number 1 inner arm (index #8) at the nonsteer end. Raise the number 1 inner arm (index

#18) and remove the safety arm. Lower the number 1 inner arm (index #8) onto the block that was placed across the chassis.

Bodily injury hazard. Keep hands clear of moving parts when lowering the arms onto the block.

37 Remove the cables from the number 1 inner arm

(index #8)and lay them off to the side.






38 Support and secure the entry ladder to an appropriate lifting device.

39 Remove the entry ladder mounting fasteners.

Remove the entry ladder from the machine.

Crushing hazard. The entry ladder may become unbalanced and fall if not properly suported and secured to the lifting device.

40 Attach the strap from the overhead crane to the number 1 outer arm (index #18). Do not lift it.




1 inner arm (index #18) may become unbalanced and fall if not properly supported when the pin is removed.

43 Slide the number 1 outer arm (index #18) to the non-steer end and remove it from the machine.


1 outer arm (index #18) may become unbalanced and fall if not properly supported when removing it from the machine.

44 Attach the strap from an overhead crane to the number 1 inner arm (index #8). Do not lift it.

45 Remove the pin retaining fasteners from both of the number 1 pivot pins (index #9). Use a slide hammer to remove the pins.

46 Remove the number 1 inner arm (index #8) from the machine.

Bodily injury hazard. The number 1 inner arm (index #8) may become unbalanced and fall if not properly supported when removed from the machine.

How to Replace the Scissor Arm

Wear Pads


2 Remove the mounting fasteners from the stationary wear pads on the platform.

Note the position of the wear pads before they are removed so when the new ones are installed they will be in the correct position.


4 Remove the entry ladder mounting fasteners.

Remove the entry ladder from the machine.

Crushing hazard. The entry ladder may become unbalanced and fall if not properly suported and secured to the lifting device.

5 Raise the platform approximately 7 to 8 feet

(2.1 to 2.4 m).



8 Mark the mounting position of the level lensor box on the drive chassis.

9 Remove the level sensor box lid.

10 Mark the mounting position of the level sensor on the level sensor box.

11 Remove the level sensor mounting fasteners.




12 Remove the level sensor box mounting fasteners and slide the box towards the nonsteer end of the machine as far as it can go.

Component damage hazard. Be careful not to damage the level sensor box, limit switch, level sensor or wiring while moving the level sensor box.

13 Secure the ends of the scissor arms together at both ends of the machine with a tie down strap or other appropriate device.

14 Remove the pin retaining fasteners from the number 1 inner arm pivot pins (item #9) at the steer end of the machine. Use a slide hammer to remove the pins.

15 Attach a lifting strap from an overhead crane to the steer end of the scissor arms.

16 Carefully slide the forks from a forklift under the scissor arms at the non-steer end of the machine.

17 Raise the scissor arms up until the number 1 inner arm will clear the level sensor box.

Component damage hazard. Be careful not to damage the level sensor box, limit switch or level sensor while moving the scissor assembly.

18 Move the scissor assembly towards the nonsteer end of the machine slightly and to one side of the machine until one of the scissor arm wear pads is accessible. Do not allow both wear pads to slide out of the drive chassis.

Crushing hazard. The scissor assembly will fall if both wear pads are allowed to slide out of the drive chassis.

19 Remove the old wear pad.

Note the position of the wear pad before it is removed so when the new one is installed it will be in the correct position.

20 Install the new wear pad.

21 Move the scissor assembly towards the other side of the machine until the other scissor arm wear pad is accessible.


22 Remove the old wear pad.



24 Slide the scissor assembly back into the drive chassis.

25 Lower the scissor assembly into position and install the pivot pins.

Component damage hazard. Be careful not to damage the level sensor box, limit switch or level sensor while installing the scissor assembly.



SCISSOR COMPONENTS


Steer End Non-steer End





5 Lift cylinder rod end pivot pin


7 Number 2 center pivot pin (2 pins)




11 Number 1 pivot pin (steer end) (2 pins)


7 - 16










22 Lift cylinder barrel-end pivot pin







GS-2646

Bodily injury hazard. The procedures in this section require specific repair skills, lifting equipment and a suitable workshop. Attempting this procedure without these skills and tools could result in death or serious injury and significant component damage. Dealer service is required.












6 Remove the external snap ring from the number

4 pivot pin (index #2).




8 Remove the cables from the upper cable tray and lay them off to the side.



9 Remove the mounting fasteners from the upper cable tray supports.

10 Remove the upper cable tray from the scissor assembly.



13 Use a soft metal drift to remove the number 4 pivot pin (index #3) at the steer end. Remove the number 4 inner arm (index #13) from the machine.

Crushing hazard. The number 4 inner arm (index #13) may become unbalanced and fall if not properly supported when it is removed.

14 Attach a lifting strap from an overhead crane to the number 3 outer arm (index #4) at the ground controls side.





16 Use a soft metal drift to remove the number 3 center pivot pin (index#17).

17 Remove the external snap rings from the number 3 pivot pin (index #18) at the non-steer end of the machine. Do not remove the pin.

18 Use a soft metal drift to tap the number 3 pivot pin (index #18) halfway out at the non-steer end of the machine. Remove the number 3 outer arm (index #4) at the ground controls side from the machine.




20 Use a soft metal drift to tap the number 3 pivot pin (index #18) in the other direction. Remove the number 3 outer arm (index #4) from the battery pack side of the machine.


3 outer arm (index #4) at the battey pack side may become unbalanced and fall if not properly supported when it is removed from the machine.

21 Remove the number 3 pivot pin (index #18) from the non-steer end of the machine.

22 Attach a lifting strap from an overhead crane to the lug on the rod end of the lift cylinder for support. Do not lift it.

23 Remove the pin retaining fasteners from the lift cylinder rod-end pivot pin (index #5). Use a soft metal drift to remove the pin.

Bodily injury hazard. The cylinder may fall when the rod-end pivot pin is removed if it is not properly supported.


25 Remove the cables from the number 3 inner arm (index #16) and lay them to the side.


27 Remove the external snap rings from the number 3 pivot pin (index #6) at the steer end.




29 Remove the cable clamps from the lower cable tray. Lay the cables to the side.



30 Remove the mounting fasteners from the lower cable tray supports.

31 Remove the mounting fasteners from the lower cable tray mounting bracket on the number 2 center pivot pin (index #7) at the ground controls side of the machine.






34 Remove the external snap rings from the number 2 center pivot pin (index #7) at the ground controls side.


36 Use a soft metal drift to tap the number 2 pivot pin (index #21) halfway out at the non-steer end of the machine. Remove the number 2 outer arm (index #20) from the ground controls side of the machine.





39 Use a soft metal drift to remove the number 2 center pivot pin (index #7) at the battery pack side.


2 outer arm (index #20) at the battery pack side may become unbalanced and fall if not properly supported when it is removed from the machine.




42 Remove the external snap rings from the number 2 pivot pin (index #8) at the steer end of the machine.






46 Raise the number 1 inner arm (index #10) approximately 2 feet (0.6 m) and install the safety arm between the number 1 inner arm

(index #10) and the number 1 outer arm

(index #23). Lower the scissor arms onto the safety arm.








49 Attach a lifting strap from an overhead crane to the lug on the rod end of the lift cylinder. Raise the lift cyinder to a vertical positon.

50 Remove the pin retaining fasteners from the lift cylinder barrel-end pin (index #22). Use a soft metal drift to remove the pin. Remove the cylinder from the machine.

Crushing hazard. The cylinder may become unbalanced and fall when it is removed from the machine if it is not properly attched to the overhead crane.


51 Place a 4x4x48 inch (10x10x122 cm) long block across both sides of the chassis under the number 1 center pivot pin (index #9).

52 Attach a lifting strap from an overhead crane to the number 1 inner arm (index #10) at the nonsteer end. Raise the number 1 inner arm and remove the safety arm. Lower the number 1 inner arm (index #10) onto the block that was placed across the chassis.


53 Remove the cables and hydraulic hoses from the number 1 inner arm (index #10) and lay them to the side.


Cables and hoses can be damaged if they are kinked or pinched.


55 Remove the mounting fasteners from the entry ladder and remove the entry ladder from the machine.

Crushing hazard. The entry ladder may become unbalanced and fall if not properly supported and secured to the lifting device.

56 Attach a lifting strap from an overhead crane to the number 1 outer arm (index #23). Do not lift it.







1 outer arm (index #23) may become unbalanced and fall if not properly supported when the pin is removed.



1 outer arm (index #23) may become unbalanced and fall if not properly supported when it is removed from the machine.

Note the position of the wear pads before the arm is removed so when the scissor is assembled they will be in the correct position.

60 Attach the strap from an overhead crane to the number 1 inner arm (index #10). Do not lift it.

61 Remove the pin retaining fasteners from both of the number 1 pivot pins (index #11) at the steer end of the machine. Use a slide hammer to remove the pins.




Component damage hazard. Be sure not to damage the limit switch or level sensor box components when the number 1 inner arm

(index #10) is removed from the machine.


Wear Pads

1 Remove the platform. See 2-1,

How to Remove the Platform.












7 Raise the platform approximately 7 to 8 feet (2.1

to 2.4 m).



10 Mark the mounting position of the level sensor box on the drive chassis.




14 Remove the level sensor box mounting fasteners and slide the box towards the nonsteer end of the machine as far as it can go.



16 Remove the pin retaining fasteners from the number 1 inner arm pivot pins (item #11) at the steer end of the machine. Use a slide hammer to remove the pins.






















Scissor Components, GS-3246

Steer end



3 Upper lift cylinder rod-end pivot pin






9 Lower lift cylinder rod-end pivot pin






15 Number 1 pivot pin (steer end) (2 pins)

7 - 24

Non steer end








23 Upper lift cylinder barrel-end pivot pin






29 Lower lift cylinder barrel-end pivot pin





3-3




GS-3246

Bodily injury hazard. This procedure requires specific repair skills, lifting equipment and a suitable workshop. Attempting this procedure without these skills and tools could result in death or serious injury and significant component damage. Dealer service is required.
















8 Remove the cable clamps from the number 5 inner arm (index #17). Lay the cables off to the side of the machine.

9 Remove the mounting fasteners from the upper cable tray supports.

10 Remove the mounting fasteners from the upper cable tray mounting bracket on the number 4 center pivot pin (index #5) at the ground controls side of the machine.

11 Remove the upper cable tray from the scissor assembly.



12 Attach a lifting strap from an overhead crane to the lug on the rod end of the upper lift cylinder.

13 Remove the pin retaining fasteners from the upper cylinder rod-end pivot pin (index #3). Use a soft metal drift to remove the pin.

Crushing hazard. The cylinder may fall if not properly supported when the pin is removed.










18 Remove the external snap rings from the number 4 center pivot pin (index #5) at the ground controls side.


20 Use a soft metal drift to remove both of the number 4 center pivot pins (index #5).

21 Remove the external snap rings from the number 4 pivot pin (index #22) at the non-steer end of the machine.

22 Use a soft metal drift to remove the number 4 pivot pin (index #22). Remove the number 4 outer arm (index #21) from the machine.


4 outer arm (index #21) may become unbalanced and fall if not properly supported when it is removed from the machine.




Bodily injury hazard. The number 4 inner arm (index #20) may become unbalanced and fall if not properly supported when it is removed from the machine.





29 Connect the platform controls to the control cable that was removed from the platform.

30 Connect the battery pack. Turn the key switch to ground control and pull out the Emergency

Stop button to the

ON

position at both the platform and ground controls.

31 Activate the up function and raise the number 2 inner arm (index #26) approximately 2 feet

(0.6 m). Then install the safety arm between the number 2 inner arm (index #26) and the number 1 inner arm (index #14).





32 Activate the down function to lower the scissor assembly onto the safety arm. Push in the

Emergency Stop buttons and turn the key to the

OFF

position.

Bodily injury hazard. The scissor assembly may become unbalanced and fall if not properly supported by the safety arm.


33 Attach a lifting strap from an overhead crane to the lug on the rod end of the upper lift cylinder.

Raise the rod end of the cylinder to a vertical position.

34 Remove the pin retaining fasteners from the upper lift cylinder barrel-end pivot pin (index

#23). Use a soft metal drift to remove the pin.

Remove the cylinder from the machine.

Crushing hazard. If the overhead crane is not properly attached, the cylinder may become unbalanced and fall when it is removed from the machine.




36 Activate the up fuction and raise the number 2 inner arm (index #26) approximately 2 feet

(0.6 m). Remove the safety arm from the machine.

Bodily injury hazard. Keep hands clear of moving parts when removing the safety arm.

37 Activate the down function and fully lower the scissor assembly. Push in the Emergency Stop button and turn the key to the

OFF

position.

Disconnect the battery pack.

Bodily injury hazard. Keep hands clear of moving parts when lowering the scissor assembly.





42 Use a soft metal drift to tap the number 3 pivot pin (index #25) halfway out at the non-steer end of the machine. Remove the number 3 outer arm (index #7) at the ground controls side from the machine.


3 outer arm (index #7) at the ground controls side may become unbalanced and fall if not properly supported when removed from the machine.





44 Use a soft metal drift to tap the number 3 pivot pin (index #10) at the steer end in the other direction. Remove the number 3 outer arm

(index #7) from the battery pack side of the machine.



(index #24) and lay them off to the side.



46 Remove the cables from the lower cable tray on the number 2 inner arm (index #26). Lay the cables off th the side.

47 Remove the mounting fasteners from the lower cable tray supports.

48 Remove the external snap rings from the number 2 center pivot pin (index #11) at the ground controls side. Do not remove the pin.




50 Attach a lifting strap from an overhead crane to the lug on the rod end of the lower lift cylinder.

51 Remove the pin retaining fasteners from the lower lift cylinder rod-end pivot pin (index #9).

Use a soft metal drift to remove the pin.










59 Use a soft metal drift to tap the number 2 pivot pin (index #28) halfway out at the non-steer end of the machine. Remove the number 2 outer arm (index #27) from the ground controls side of the machine.

Bodily injury hazard. The number 2 outer arm (index #27) at the ground controls side may become unbalanced and fall if not properly supported when it is removed from the machine.





61 Remove the external snap rings from the number 2 center pivot pin (index #11) at the battery pack side of the machine.

62 Use a soft metal drift to remove the number 2 center pivot pin (index #11) at the battery pack side of the machine.




64 Use a soft metal drift to remove the number 2 pivot pin (index #28) from the machine.




Bodily injury hazard. The number 2 inner arm (index #26) may become unbalanced and fall if not properly supported when it is removed from the machine.

68 Attach the strap from the overhead crane to the number 1 inner arm (index #14).

69 Using the overhead crane, lift the number 1 inner arm (index #14) approximately 2 feet (0.6 m).

Place a 4x4x48 inch (10x10x122 cm) long block across both sides of the chassis under the number 1 center pivot pin (index #13). Lower the scissor arms onto the block.





72 Attach a lifting strap from an overhead crane to the lug on the rod end of the lift cylinder.

73 Remove the pin retaining fasteners from the lower lift cylinder barrel-end pivot pin (index

#29). Use a soft metal drift to remove the pin.

Remove the cylinder from the machine.

Crushing hazard. If the overhead crane is not properly attached, the cylinder may become unbalanced and fall when it is removed from the machine.









(index #14) and lay them off to the side.



77 Attach a lifting strap from an overhead crane to the number 1 outer arm (index #30). Do not lift it.



Crushing hazard. The number 1 outer arm (index #30) may become unbalanced and fall if not properly supported when the pin is removed.


Crushing hazard. The number 1 outer arm (index #30) may become unbalanced and fall if not properly supported when removing it from the machine.

Note the position of the wear pads before the arm is removed so when the scissor is assembled they will be in the correct position.


Do not lift it.

82 Remove the pin retaining fasteners from both of the number 1 pivot pins (index #15). Use a slide hammer to remove the pins.


Crushing hazard. The number 1 inner arm (index #14) may become unbalanced and fall if not properly supported when removed from the machine.


Wear Pads







(2.1 to 2.4 m).




SCISSOR COMPONENTS


Crushing hazard. Keep hands clear of moving parts when lowering the arms onto the safety arm.

8 Mark the mounting position of the level sensor box on the drive chassis.




12 Remove the fasteners from the level sensor box and slide the box towards the non-steer end of the machine as far as it can go.



14 Remove the pin retaining fasteners from the number 1 inner arm pivot pins (index #15) at the steer end of the machine. Use a slide hammer to remove the pins.


















SCISSOR COMPONENTS

3-4

Lift Cylinder

How to Remove the Lift Cylinder

GS-2046 & 2646

Bodily injury hazard. This procedure requires specific repair skills, lifting equipment and a suitable workshop. Attempting this procedure without these skills and tools could result in death or serious injury and significant component damage. Dealer service is strongly recommended.

When removing a hose assembly or fitting, the O-ring on the fitting and/or hose end must be replaced and then torqued to specification during installation. Refer to

Section Two, Hydraulic Hose and

Fitting Torque Specifications.


(2.1 to 2.4 m).




4 Tag and disconnect the wiring from the solenoid valve at the barrel end of the lift cylinder.

5 Disconnect the manual lowering cable from the solenoid.

During assembly, the manual platform lowering cable needs to be properly adjusted. Refer to 4-1,

How to Adjust the Manual

Platform Lowering Cable.

6 Remove the mounting fasteners from the manual lowering cable mounting bracket.

Remove the bracket from the cylinder.

7 Disconnect and plug the hydraulic hose from the lift cylinder. Cap the fitting on the cylinder.


8 Attach a lifting strap from an overhead crane or similar lifting device to the rod end of the lift cylinder for support.

9 Remove the external snap ring from the lift cylinder rod-end pivot pin. Then use a soft metal drift to remove the pin.

Crushing hazard. The lift cylinder may become unbalanced and fall if not properly supported.

10 Lower the cylinder to a horizontal position.

If removing the lower lift cylinder, remove the entry ladder from the non-steer end of the machine.



SCISSOR COMPONENTS




13 Support the barrel end of the lift cylinder with a lifting device.

14 Remove the external snap ring from the lift cylinder barrel-end pivot pin. Then use a soft metal drift to remove the pin.


15 Carefully pull the cylinder out the non-steer end of the machine through the scissor arms.


How to Remove the Lift Cylinder

GS-3246 Models

Bodily injury hazard. This procedure requires specific repair skills, lifting equipment and a suitable workshop. Attempting this procedure without these skills and tools could result in death or serious injury and significant component damage. Dealer service is strongly recommended.


Two, Hydraulic Hose and Fitting

Torque Specifications.

1 Raise the platform approximately 10 feet (3 m).




4 Tag and disconnect the wiring from the solenoid valve at the barrel end of the lift cylinder.

5 Disconnect and plug the hydraulic hose from the lift cylinder. Cap the fitting on the cylinder.




SCISSOR COMPONENTS

6 Attach a lifting strap from an overhead crane or similar lifting device to the rod end of the lift cylinder for support.

7 Remove the external snap rings from the lift cylinder rod-end pivot pin. Then use a soft metal drift to remove the pin.


8 Lower the cylinder to a horizontal position.

If removing the lower lift cylinder, remove the entry ladder from the non-steer end of the machine.

9 To remove the lower cylinder, support and secure the entry ladder to an appropriate lifting device. Then remove the mounting fasteners from the entry ladder and remove the entry ladder from the machine.


10 Support and secure the lift cylinder to an appropriate lifting device.

11 Remove the external snap ring from the lift cylinder barrel-end pivot pin. Then use a soft metal drift to remove the pin.

Crushing hazard. The cylinder may become unbalanced and fall when it is removed from the machine if it is not properly attached and secured to the lifting device.

12 Carefully pull the cylinder out the non-steer end of the machine through the scissors arms.


How to Check the Resistance of a Lowering Valve Coil


OFF

position and disconnect the wire from the valve coil to be tested.

2 Connect the positive lead from the ohmmeter to the valve coil terminal, then connect the negative lead from the ohmmeter to the internal ring of the valve coil.

Lift cylinder lowering valve coil specifications

GS-2046 & GS-2646

2 position 2 way N.C. solenoid valve - 20V 23 - 25

9

(hydraulic schematic item Q)

Lift cylinder lowering valve coil specifications

GS-3246

2 position 2 way N.C. solenoid valve - 20V 23 - 25

9

(hydraulic schematic items Q and R)



Ground Controls

4-1

Manual Platform Lowering

Cable, GS-2046 & GS-2646

The manual platform lowering cable lowers the platform in the event of a main power failure. The manual platform lowering cable is attached to the barrel end of the lift cylinder and is activated next to the ground controls.

How to Adjust the Manual

Platform Lowering Cable


(2.1 to 2.4 m).

2 Lift the safety arm, move to the center of the scissor arm and rotate to a vertical position.



4 Push the handle on the manual platform lowering cable all the way in.

5 Disconnect the cable mounting nut from the lowering valve at the barrel end of the lift cylinder.

6 Pull the cable tight and measure the distance between the end of the lowering cable and the end of the lowering valve.

Result: The measurement should be

3

/

16

to

1

/

4

inch (4.7 to 6.4 mm).

7 To adjust, loosen the upper lock nut on the cable mounting bracket. Turn the lower lock nut clockwise to decrease the distance or counterclockwise to increase the distance.

8 Tighten the upper lock nut and re-measure the distance between the end of the lowering cable and the end of the lowering valve. Re-adjust if needed.

9 Install the cable mounting nut onto the lowering valve.

10 Raise the platform and rotate the safety arm to the storage position.

11 Pull the manual lowering handle at the ground controls 2 to 3 times to ensure it is functioning correctly.

Cable distance

3

/

16

to

1

/

4

inch 4.7 to 6.4 mm f a b c d e a manual lowering

cable sheath b upper lock nut c cable mounting

bracket d lower lock nut e cable mounting nut f end of the lowering

cable g manual lowering valve

(schematic item Q) g

R



GROUND CONTROLS

4-2

Manual Platform Lowering -

GS-3246

The manual platform lowering button lowers the platform in the event of a main power failure. There is no adjustment required. Two 12V batteries are wired in series supplying 24V to the manual platform lowering button. The batteries are located inside the ground control panel.

How to Replace the Manual

Platform Lowering Batteries

1 Remove the cover from the ground control panel.

2 Tag and disconnect the wires from the battery to be removed.

3 Remove the battery from the machine.

4 Install the new battery and connect the wires.

5 Install the ground control cover.

4-3

Toggle Switches

See 1-4, Toggle Switches.



Hydraulic Pump

5-1

Hydraulic Pump

The hydraulic pump is attached to the motor which makes up the Hydraulic Power Unit.

How to Test the Hydraulic Pump


Section Two, Hydraulic Hose and

Fitting Torque Specifications.

1 Disconnect and plug the high pressure hydraulic hose from the hydraulic pump.


2 Connect a 0 to 5000 psi (0 to 345 bar) pressure gauge to the high pressure port on the pump.


ON position.

4 Activate the platform up function from the ground controls.

Result: If the pressure gauge reads 3700 psi

(255 bar), immediately stop. The pump is good.

Result: If pressure fails to reach 3700 psi

(255 bar), the pump is bad and will need to be serviced or replaced.

5 Remove the pressure gauge and reconnect the hydraulic hose.


Hydraulic Pump




1 Tag, disconnect and plug the hoses on the pump. Cap the fittings on the pump.


2 Remove the pump mounting bolts. Carefully remove the pump.



Manifolds


1

11

12

13

8

9

6

7

10

4

5

2

3

6-1

Function Manifold Components (before serial number 17482)

The function manifold is mounted inside the hydraulic power unit tray.

Index

No.

Description

Schematic

Item Function Torque

Flow regulator,

0.75 gpm (2.83 L/min) ....................... A ........... Steer circuit ....................................... 35-40 ft-lbs (47-54 Nm)

Diagnostic nipple .............................. B ........... Testing .............................................. 10-12 ft-lbs (14-16 Nm)

Orifice plug, 0.025 in (0.6 mm) .......... C ........... Brake circuit

Orifice washer, 0.040 inch (1 mm) .... D ........... Steering circuit

Relief valve, 1500 psi (103.4 bar) ..... E ........... Steering relief ................................... 25-30 ft-lbs (34-41 Nm)

Relief valve, 3700 psi (255.1 bar) ..... F ........... System relief ..................................... 25-30 ft-lbs (34-41 Nm)

3 position 4 way solenoid valve ........ G ........... Steer left/right .................................... 18-20 ft-lbs (24-27 Nm)

2 position 4 way solenoid valve ........ H ........... Platform up ....................................... 23-25 ft-lbs (31-34 Nm)

Orifice washer, 0.060 in (1.5 mm) ..... I ............ Brake circuit

2 position 2 way solenoid valve ........ J ............ Brake circuit ...................................... 18-20 ft-lbs (24-27 Nm)

Check valve ....................................... K ........... Drive circuit ....................................... 35-40 ft-lbs (47-54 Nm)

2 position 4 way solenoid valve ........ L ........... Drive speed select circuit ................. 23-25 ft-lbs (31-34 Nm)

3 position 4 way solenoid valve ........ M .......... Drive forward/reverse ....................... 18-20 ft-lbs (24-27 Nm)

Important notes:

Schematic item E changed to 1500 PSI (103.4 bar) after serial number 3405

Schematic item C was deleted after serial number 8798

Schematic item J was deleted after serial number 8798

Schematic item A changed to 0.75 GPM (2.8 L/min) after serial number 11500

Schematic item K changed to 200 PSI (13.8 bar) after serial number 16893

Plug Torque Specifications

Description

SAE No. 2

SAE No. 4

SAE No. 6

Hex Size

1

/

8

3

/

16

1

/

4

Torque

50 in-lbs / 6 Nm

13 ft-lbs / 18 Nm

18 ft-lbs / 24 Nm

Description

SAE No. 8

SAE No. 10

SAE No. 12

Hex Size

5

/

16

9

/

16

5

/

8

Torque

50 ft-lbs / 68 Nm

55 ft-lbs / 75 Nm

75 ft-lbs / 102 Nm



MANIFOLDS



MANIFOLDS

8

9

10

4

5

6

7

11

12

1

2

3

6-2

Function Manifold Components (after serial number 17481)

The function manifold is mounted inside the hydraulic power unit tray.

Index

No.

Description

Schematic


Check valve ....................................... A ........... Steer circuit ....................................... 25-30 ft-lbs (34-41Nm)

Diagnostic nipple .............................. B ........... Testing .............................................. 10-12 ft-lbs (14-16 Nm)

Flow regulator,

0.75 gpm (2.83 L/min) ....................... C ........... Steer circuit ...................................... 35-40 ft-lbs (47-54 Nm)

Orifice washer, 0.040 inch (1 mm) .... D ........... Steering circuit

Relief valve, 1500 psi (103.4 bar) ..... E ........... Steering relief ................................... 25-30 ft-lbs (34-41 Nm)

Relief valve, 3700 psi (255.1 bar) ..... F ........... System relief ..................................... 25-30 ft-lbs (34-41 Nm)

3 position 4 way solenoid valve ........ G ........... Steer left/right .................................... 18-20 ft-lbs (24-27 Nm)

2 position 4 way solenoid valve ........ H ........... Platform up ....................................... 23-25 ft-lbs (31-34 Nm)

2 position 2 way solenoid valve ........ I ............ Brake circuit ...................................... 18-20 ft-lbs (24-27 Nm)

2 position 4 way solenoid valve ........ J ............ Drive speed circuit select ................. 23-25 ft-lbs (31-34 Nm)

3 position 4 way solenoid valve ........ K ........... Drive forward/reverse ....................... 18-20 ft-lbs (24-27 Nm)

Back presure relief valve .................. L ........... Drive circuit ....................................... 25-30 ft-lbs (34-41 Nm)


Description

SAE No. 2

SAE No. 4

SAE No. 6

Hex Size

1

/

8

3

/

16

1

/

4

Torque

50 in-lbs / 6 Nm

13 ft-lbs / 18 Nm

18 ft-lbs / 24 Nm

Description

SAE No. 8

SAE No. 10

SAE No. 12

Hex Size

5

/

16

9

/

16

5

/

8

Torque

50 ft-lbs / 68 Nm

55 ft-lbs / 75 Nm

75 ft-lbs / 102 Nm



MANIFOLDS



MANIFOLDS

6-3

Valve Adjustments -

Function Manifold

Be sure that the hydraulic oil level is between the

FULL

and

ADD


How to Adjust the System Relief

Valve, GS-2046 & GS-2646

1 Open the hydraulic power unit module tray and locate the system relief valve on the function manifold.

2 Place maximum rated load into the platform.

Secure the load to the platform.

Maximum Capacity

GS-2046

GS-2646

1200 lbs

1000 lbs

363 kg

454 kg



4 Hold the system relief valve with a wrench and remove the cap (item #4, function manifold).

5 While activating the platform up function, adjust the internal hex socket clockwise to increase lift capacity or counterclockwise to decrease lift capacity. Adjust the relief valve until the platform just begins to raise.


7 Add an additional 100 pounds (45.4 kg) to the platform. Secure the additional weight.


9 The power unit should not be able to lift the platform. If the power unit lifts the platform, adjust the internal hex socket counterclockwise until the platform will not raise.

Tip-over hazard. Do not adjust the relief valve to allow the power unit to lift more than maximum rated load.

10 Install the relief valve cap.

11 Bleed the hydraulic system. Raise the platform to full height, and then lower it to the stowed position through two complete cycles.

Result: If the pump cavitates or platform fails to reach full height, add hydraulic oil until the pump is functioning correctly. Do not overfill the hydraulic reservoir. Re-test the system by performing steps 8 through 11.

Component damage hazard. Do not continue to operate the machine if the hydraulic pump is cavitating. If the pump is still cavitating, see 5-1, How to Test the Hydraulic Pump.

How to Adjust the Drive Relief

Valve, GS-3246

1 Connect a 0 to 5000 psi (0 to 345 bar) pressure gauge to the test port (item #2) on the function manifold.



3 Chock both sides of all four wheels. Then slowly move the control handle from center to the full forward position and observe the pressure reading on the pressure gauge. Return control handle to center.



MANIFOLDS

4 Turn the machine off. Hold the relief valve and remove the cap (item #6, function manifold).

5 Adjust the internal hex socket. Turn it clockwise to increase the pressure or counterclockwise to decrease the pressure. Then install the relief valve cap.

Tip-over hazard. Do not adjust the relief valve higher than specified.

6 Repeat step 3 and re-check the valve pressure.

Drive relief valve specification

Pressure 3700 psi 255.1 bar

6 Adjust the internal hex socket. Turn it clockwise to increase the pressure or counterclockwise to decrease the pressure. Install the relief valve cap.

Tip-over hazard. Do not adjust the relief valve higher than specified.

7 Repeat steps 3 and 4 to confirm the steering relief pressure.

Steering relief valve specification

Pressure 1500 psi 103.4 bar

How to Adjust the Steering

Relief Valve

1 Connect a 0 to 5000 psi (0-345 bar) pressure gauge to the test port (item #2) on the function manifold.



3 Press and hold the steer thumb rocker switch to the right. Allow the wheels to completely turn to the right, then continue holding the switch while observing the pressure reading on the pressure gauge. Note the pressure.

4 Press and hold the steer thumb rocker switch to the left. Allow the wheels to completely turn to the left, then continue holding the switch while observing the pressure reading on the pressure gauge. Note the pressure.

5 Turn the machine off. Hold the steering relief valve with a wrench and remove the cap (item

#5, function manifold).

How to check the Resistance of a Valve Coil


OFF

position and disconnect the wires from the valve coil to be tested.

2 Coils with 2 terminals: Connect the leads from the ohmmeter to the valve coil terminals.

Coils with 1 terminal: Connect the positive lead from the ohmmeter to the valve coil terminal, then connect the negative lead from the ohmmeter to the internal ring of the valve coil.

Valve coil specifications

Before serial number 11501

Coil, 20V (function manifold items G, J)

Coil, 20V (function manifold items H, L, M)

Valve coil specifications

After serial number11500

Coil, 20V (function manifold items G, I)

Coil, 20V (function manifold items H, J, K)

26 - 28

W

18 - 20

W

26 - 28

W

18 - 20

W



MANIFOLDS

6-4

Lift Relief Valve, GS-3246

How to Adjust the Lift Relief

Valve, GS-3246


FULL

and

ADD


For machines manufactured before

November 1999, contact the Genie

Industries Service Parts

Department and order a lift relief kit

(Genie part number 66174). Install the kit, then complete the following procedure. For machines manufactured after October 1999, adjust the lift relief valve

(schematic item M) using the following procedure.

1 Open the hydraulic power unit module tray and locate the lift relief valve located next to the function manifold.

2 Place maximum rated load into the platform.

Secure the load to the platform.

Maximum Capacity

GS-3246

ANSI & CE

CSA

700 lbs

500 lbs

318 kg

227 kg

4 Hold the function relief valve with a wrench and remove the cap.

5 While activating the platform up function, adjust the internal hex socket clockwise to increase lift capacity or counterclockwise to decrease lift capacity. Adjust the relief valve until the platform just begins to raise.

6 Install the relief valve cap.


8 Add an additional 100 pounds (45.4 kg) to the platform. Secure the additional weight.


10 The power unit should not be able to lift the platform with the additional weight. If the power unit lifts the platform, remove the additional weight and repeat steps 4 through 9.

Tip-over hazard. Do not adjust the relief valve to allow the power unit to lift more than maximum rated load.

Result: If the pump cavitates or platform fails to reach full height, add hydraulic oil until the pump is functioning correctly. Do not overfill the hydraulic reservoir. Re-test the system by performing steps 8 through 11.





MANIFOLDS

11 Bleed the hydraulic system. Raise the platform to full height and then lower it to the stowed position through two complete cycles.

Component damage hazard. Do not continue to operate the machine if the hydraulic pump is cavitating. If the pump is still cavitating, see 5-1, How to test the

Hydraulic Pump.

M

6-5

Back Pressure Relief Valve,

GS-3246

How to Adjust the Back

Pressure Relief Valve,

GS-3246


FULL

and

ADD


1 Open the hydraulic power unit module tray and locate the lift relief valve located next to the function manifold.

2 Turn the machine off. Hold the back pressure relief valve with a wrench and remove the cap

(item #12, function manifold).

5 Adjust the internal hex socket. Turn it clockwise to increase the pressure or counterclockwise to decrease the pressure. Then install the relief valve cap.

Lift Relief Valve Manifold, GS-3246 Models

Description .................. Relief valve, 2000 psi (241 bar)

Schematic Item ............................................................ M

Function ........................................................ Platform up

Torque ...................................... 25-30 ft-lbs (34-41 Nm)



Steering Axle Components


7-1

Yoke and Drive Motor

How to Remove the Yoke and Drive Motor




1 Block the non-steer wheels, then center a lifting jack under the drive chassis at the steer end of the machine.

2 Remove the cotter pin from the wheel castle nut.

Always replace the cotter pin with a new one when removing the castle nut.

3 Loosen the wheel castle nut. Do not remove it.

4 Raise the machine approximately 2 feet (0.6 m) and place blocks under the drive chassis for support.

Crushing hazard. The chassis will fall if it is not properly supported.

5 Remove the castle nut, then remove the wheel.

6 Tag, disconnect and plug the hoses on the drive motor. Cap the fittings on the motor.


7 Support and secure the yoke assembly with an appropriate lifting device.

8 Remove the retaining fastener from the steer link to the bellcrank.

Note the quantity and location of the spacers when disconnecting the steer link from the bellcrank.

9 Remove the retaining fastener from the top of the yoke pivot shaft.

10 Lower the yoke assembly out of the chassis.

Bodily injury hazard. The yoke/ motor assembly may fall if not properly supported when it is removed from the chassis.

During re-assembly, be sure that the spacers are installed onto the steer link.

Torque specifications

Castle nut 300 ft-lbs 406.7 Nm



How to Remove a Drive Motor

1 Block the non-steer wheels, then center a lifting jack under the drive chassis at the steer end of the machine.

2 Remove the cotter pin on the wheel castle nut of the motor to be removed.



4 Raise the machine approximately 2 inches

(5 cm) and place blocks under the drive chassis for support.

5 Remove the wheel castle nut, then remove the wheel.

6 Tag, disconnect and cap the hydraulic hoses on the drive motor. Cap the fittings on the drive motor.


7 Support and secure the drive motor to an appropriate lifting device.

8 Remove the drive motor mounting fasteners, then remove the motor.


Castle nut 300 ft-lbs 406.7 Nm


STEERING AXLE COMPONENTS



STEERING AXLE COMPONENTS

7-2

Steering Cylinder


Steering Cylinder




1 Block the non-steer wheels.

2 Tag, disconnect and plug the hydraulic hoses from the steer cylinder. Cap the fittings on the cylinder.


3 Remove the pin retaining fasteners from the barrel-end pivot pin. Use a soft metal drift to remove the pivot pin.

Note the quantity and location of the spacers when removing the rod-end pivot pin.

4 Remove the pin retaining fasteners from the rodend pivot pin. Use a soft metal drift to remove the pin.

5 Remove the steering cylinder from the machine.

7-3

Steering Bellcrank

1 Remove the steering cylinder. See 7-2, How to

Remove the Steering Cylinder.

2 Remove the pin retaining fastener from the rodend pivot pin. Use a soft metal drift to remove the pin.

3 Remove the retaining fastener from the center of the bellcrank.

Note the quantity and location of the spacers on the bellcrank.

4 Remove the retaining fasteners from the steer links at each end of the bellcrank. Remove the bellcrank from the machine.

Note the quantity and location of the spacers in between the bellcrank and the steer links.



Non-Steering Axle Components

8-1

Drive Brake

How to Remove a Drive Brake




1 Support and secure the entry ladder to an appropriate lifting device. Then remove the entry ladder mounting fasteners. Remove the entry ladder from the machine.

Crushing hazard. The entry ladder may become unbalanced and fall if it is not properly supported and secured to the lifting device.

2 Block the steer wheels and center a lifting jack under the drive chassis at the non-steer end.

3 Remove the cotter pin from the wheel castle nut.



5 Raise the machine approximately 2 inches

(5 cm) and place blocks under the drive chassis for support.

6 Remove the wheel castle nut, then remove the wheel.

7 Tag, disconnect and plug the hose on the brake.

Cap the fittings on the brake.


8 Place a lifting jack under the brake for support.

9 Remove the brake mounting fasteners from the drive chassis. Remove the brake.

Crushing hazard. The brake may become unbalanced and fall if it is not properly supported when the mounting fasteners are removed


Castle nut 300 ft-lbs 406.7 Nm




1

2

3

9-1


The brake release hand pump manifold is mounted behind the entry ladder, next to the battery charger.

Index

No.

Description

Schematic


Check valve, pilot operated ............... N ........... Manual brake release ....................... 25-30 ft-lbs (34-41 Nm)

Shuttle valve ...................................... O ........... Brake release ................................... 8-10 ft-lbs (11-14 Nm)

Hand pump ....................................... P ........... Manual brake release ...................... 25-30 ft-lbs (34-41 Nm)

N

P

O


Description

SAE No. 2

SAE No. 4

SAE No. 6

Hex Size

1

/

8

3

/

16

1

/

4

Torque

50 in-lbs / 6 Nm

13 ft-lbs / 18 Nm

18 ft-lbs / 24 Nm

Description

SAE No. 8

SAE No. 10

SAE No. 12

Hex Size

5

/

16

9

/

16

5

/

8

Torque

50 ft-lbs / 68 Nm

55 ft-lbs / 75 Nm

75 ft-lbs / 102 Nm


Distributed By:

Genie North America

Phone: 425 881 1800

Toll Free in USA 800 536 1800

Toll Free in Canada 800 426 8089

Fax: 425 883 3475

Genie UK Limited

Phone: 44 1636 605030

Fax: 44 1636 611090

Genie China

Phone: 86 21 62483040

Fax: 86 21 62588180

Genie Japan

Phone: 81 3 3453 6082

Fax: 81 3 3453 6083

Genie Australia Pty Ltd.

Phone: 61 07 3375 1660

Fax: 61 07 3375 1002

Genie France

Phone: 33 237 260 999

Fax: 33 237 260 998

Genie Holland

Phone: 31 7051 78836

Fax: 31 7051 13993

Genie Latin America

Phone: 561-994-0380

Fax: 561-997-5877