Walker B18 Operator's Manual

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Walker B18 Operator's Manual | Manualzz

Operator’s Manual

Safety, Assembly, Operating, and Maintenance Instructions

Please Read and Save These Instructions

For Safety, Read All Safety and Operation

Instructions Prior to Operating Machine

Beginning S/N: 133002

P/N 4000-18

Foreword

Thank you. . .

for purchasing a Walker mower. Every effort has been made to provide you with the most reliable mower on the market, and we are sure you will be among our many satisfied customers. If for any reason this product does not perform to your expectations, please contact your local dealer. Every customer is important to us. Your satisfaction is our goal.

Please. . .

read this manual thoroughly! This manual is to be used in conjunction with the engine manufacturer’s manual for the specific engine on the mower model you have purchased. Before you operate your new mower, please read this entire manual. Some of the information is crucial for proper operation and maintenance of this mower - it will help protect your investment and ensure that the mower performs to your satisfaction. Some of the information is important to your safety, and must be read and understood to help prevent possible injury to the operator or others. If anything in this manual is confusing or hard to understand, please contact your local authorized dealer or call our service department, at (970) 221-5614, for clarification before operating or servicing this mower.

This manual covers Model B18 with the Briggs & Stratton Vanguard (18 HP) gasoline engine.

All shields and guards must be in place for the proper and safe operation of this machine.

Where they are shown removed in this manual, it is for illustration purposes only.

Do not operate this machine unless all shields and guards are in place.

Specifications given are based on the latest information available at the time this manual was produced for a tractor with standard equipment. Optional equipment is available and may affect the standard specifications listed.

Walker Mfg. Co. is continually striving to improve the design and performance of its products. We reserve the right to make changes in specifications and design without thereby incurring any obligation relative to previously manufactured products.

Sincerely,

WALKER MANUFACTURING COMPANY

Bob Walker, President

Table of Contents

General Information

________________ 1

HIGHLIGHTED INFORMATION _____________ 1

GLOSSARY ____________________________ 1

IDENTIFYING NUMBER LOCATIONS ________ 1

ENGINE SERIAL NUMBER LOCATION _______ 2

SERVICING OF ENGINE AND

DRIVETRAIN COMPONENTS ______________ 2

Specifications

________________________ 3

ENGINE ________________________________ 3

ELECTRICAL SYSTEM ___________________ 3

TRANSAXLE ____________________________ 3

BLADE DRIVE __________________________ 4

TIRE SIZE ______________________________ 4

TIRE PRESSURE ________________________ 4

MOWER DECK __________________________ 4

DIMENSIONS (Tractor and Mower) __________ 5

DRIVE BELTS ___________________________ 5

SEAT __________________________________ 5

FRAME/BODY CONSTRUCTION ____________ 5

Component Identification

___________ 6

Safety Instructions

__________________ 9

BEFORE OPERATING ____________________ 9

OPERATING ___________________________ 11

MAINTENANCE ________________________ 13

SAFETY, CONTROL, AND

INSTRUCTION DECALS _________________ 14

Assembly Instructions

______________ 17

SETUP INSTRUCTIONS __________________ 17

Tire Installation (Tractor) _______________ 17

Battery Service _______________________ 17

Wet Battery Service __________________ 17

Dry Battery Service ___________________ 17

Battery Charging _____________________ 18

Battery Installation ___________________ 18

Mower Deck Assembly _________________ 18

Deck Caster Wheels Installation _________ 18

Deck Discharge Deflector

Shield Installation ____________________ 19

PTO Shaft Guard Installation ___________ 19

Tilt-Up Roller Wheel Installation _________ 19

Mower Deck Installation on Tractor _______ 20

Deck Installation _____________________ 20

Deck Leveling _______________________ 21

PREOPERATING CHECKLIST _____________ 22

Operating Instructions

_____________ 24

CONTROL IDENTIFICATION,

LOCATION, AND FUNCTION _____________ 24

Ignition Switch _______________________ 24

Engine Choke ________________________ 25

Engine Throttle _______________________ 25

Forward Speed Control (FSC) ___________ 25

Steering Levers _______________________ 25

Blade Clutch (PTO) ____________________ 25

Circuit Breaker _______________________ 27

Parking Brake ________________________ 27

Transaxle Lockout Arms _______________ 27

Body Latch __________________________ 28

Hourmeter ___________________________ 28

STARTING THE ENGINE _________________ 29

ADJUSTING GROUND

SPEED AND STEERING __________________ 29

ENGAGING THE BLADE DRIVE ___________ 31

STOPPING THE MACHINE _______________ 32

ADJUSTING CUTTING HEIGHT ____________ 33

TRANSAXLE LOCKOUT _________________ 34

RECOMMENDATIONS FOR MOWING ______ 34

RECOMMENDATIONS FOR TILT-UP DECK

OPERATION/TRANSPORT _______________ 36

Maintenance Instructions

__________ 37

MAINTENANCE SCHEDULE CHART _______ 37

IMPORTANT TIPS FOR CARE OF THE

BRIGGS & STRATTON ENGINE ___________ 38

Fuel System _________________________ 38

Starting/Stopping _____________________ 38

Cooling System ______________________ 38

Air Cleaner System ____________________ 38

Oil __________________________________ 38

LUBRICATION _________________________ 39

Engine Oil ___________________________ 39

Engine Break-In Oil ___________________ 39

Checking Engine Crankcase Oil Level ____ 39

Changing Engine Crankcase Oil/Oil Filter __ 40

Grease Fitting and Oil Point Lubrication __ 41

PTO U-Joint Lubrication (Tractor) ________ 41

Mower Deck Gearbox Lubrication ________ 44

Mower Deck Spindle Lubrication ________ 44

Check Transaxle Fluid Level ____________ 44

Transaxle Oil and Filter Change _________ 45

Table of Contents

CLEANING ____________________________ 46

Engine Air Cooling System _____________ 46

Cooling Air Intake Screen ______________ 46

Cylinder Head Cooling Fins ____________ 47

Engine Air Cleaner System _____________ 48

Cummins/Fleetguard OptiAir™

Air Cleaner _________________________ 48

Grass Buildup in Mower Deck Housing ___ 50

Transaxle Housing ____________________ 51

CHECKING/SERVICING __________________ 52

Security of Air Filtration Components ____ 52

Battery ______________________________ 52

Electrolyte Level _____________________ 52

Cleaning the Terminals ________________ 52

Charging the Battery __________________ 52

Tire Pressure _________________________ 53

Wheel Nut Torque _____________________ 53

Sharpen Mower Blades ________________ 53

Drive Belts ___________________________ 54

Mower Deck Gearbox Oil Seals __________ 54

Spark Plugs __________________________ 54

Breaker Points _______________________ 54

Fuel Lines and Clamps _________________ 54

Blade Brake Action ____________________ 54

PTO U-Joints ________________________ 55

Ignition Wires ________________________ 55

Safety Switch System __________________ 55

Forward Speed Control Friction Lock _____ 55

Transmission Control Setting ___________ 55

REPLACING/REPAIRING _________________ 56

Drive Belts ___________________________ 56

Engine/PTO Belt _____________________ 57

Ground Drive Belt ____________________ 58

Fuel Filter ___________________________ 59

Blade Overload Shear Bolts _____________ 59

Mower Blades ________________________ 60

ADJUSTMENTS ________________________ 61

Transmission Control __________________ 61

Steering Lever Position Adjustment ______ 61

Steering Handles Adjustment ___________ 62

Neutral Position Adjustment ____________ 62

Full Forward Speed Adjustment _________ 64

Straight Tracking Adjustment ___________ 64

FSC Neutral Switch Adjustment _________ 64

Forward Speed Control

Friction Adjustment ___________________ 65

Blade Clutch (PTO) ____________________ 66

Clutch Engagement/Belt Tension ________ 66

Clutch Disengagement/Brake Action _____ 67

Idler Pulley Maximum Travel Adjustment __ 67

Blade Brake Band Adjustment __________ 68

Tilt-Up Deck Adjustable Stop ____________ 68

MAINTENANCE AND SERVICE

RECORD SHEET _______________________ 69

Warranty

___________________________ 71

General Information

HIGHLIGHTED INFORMATION

Walker Manufacturing recommends that any service requiring special training or tools be performed by an authorized Walker Mower dealer. There are several general practices to be aware of in the area of safety. Most accidents associated with the operation or maintenance of a Walker Mower are caused by disregarding basic safety precautions or specific warnings. Such accidents, in most cases, can be prevented by being aware of the dangers present.

Information of special importance has been highlighted in bold type in this manual. Refer to Safety

Instructions for the meanings of DANGER, WARN-

ING, CAUTION, IMPORTANT, and NOTE.

GLOSSARY

There are many terms that are either unique to this equipment or that are used as acronyms. The following terms and their definitions will help while using this manual:

● DECK is the mowing attachment mounted on the front of the tractor which includes the carrier frame, deck housing, belt or gear drive components, and cutter blades.

● FORWARD SPEED CONTROL (FSC) controls the maximum forward speed of the tractor; functioning as a cruise control.

● GROUND DRIVE refers to the dual transaxles which drive the main wheels.

● LEFT HAND (LH) refers to the left-hand side of the tractor when the operator is seated facing forward in the tractor seat.

● POWER TAKE-OFF (PTO) transmits engine power to run the cutter blades.

● RIGHT HAND (RH) refers to the right-hand side of the tractor when the operator is seated facing forward in the tractor seat.

● SIDE DISCHARGE (SD) discharges mowed material from the right side of the mower deck.

● STEERING LEVERS steer the tractor by controlling the two transaxles.

● TRACTOR is the prime mover, including the engine, drivetrain, operator seat, and controls to operate the mower.

● TRANSAXLE transmits and controls power from the ground drive belt to the main drive wheel.

● TRANSAXLE LOCKOUT ARMS release the transaxles to permit freewheeling the tractor.

IDENTIFYING NUMBER LOCATIONS

The tractor serial number plate is affixed to the tractor body just below the left rear corner of the seat.

The mower deck serial number plate is affixed alongside the angle iron framing on the LH side of the LH mower blade drive. Model and serial numbers are helpful when obtaining replacement parts and maintenance assistance. For ready reference, please record these numbers in the space provided.

Tractor Model No. ______________________

Tractor Serial No. ______________________

Deck Serial No. ______________________

Engine Model No. ______________________

Engine Serial No. ______________________

Date of Purchase ______________________

Fill In By Purchaser

Serial Number

Tractor Serial Number Location

1

2

General Information

Serial Number

Mower Deck Serial Number Location

ENGINE SERIAL NUMBER LOCATION

Refer to the engine manual that accompanies this manual or the photo below for the location of the engine serial number.

Serial Number

Engine Serial Number Location

SERVICING OF ENGINE AND DRIVETRAIN

COMPONENTS

The detailed servicing and repair of the engine, transaxles, and gearboxes are not covered in this manual. Only routine maintenance and general service instructions are provided. For the service of these components during the limited warranty period, it is important to find a local, authorized servicing agent of the component manufacturer. Any unauthorized work done on these components during the warranty period may void the warranty.

If you have any difficulty finding an authorized outlet or obtaining warranty service, please contact our Service

Department for assistance:

Walker Manufacturing Company

5925 E. Harmony Road

Fort Collins, CO 80528

1-970-221-5614 www.walkermowers.com

Service manuals are available for each of these components from their respective manufacturers as follows:

Briggs & Stratton Briggs & Stratton

Engine 800-233-3723

(24-hour hotline in

USA & Canada)

www.briggsandstratton.com

Transaxle Hydro-Gear

1411 South Hamilton St.

Sullivan, IL 61951

877-728-7410

www.hydro-gear.com

Gearboxes (Deck) Peerless Gear

1555 South Jackson St.

Salem, IN 47167 USA

866-536-8310

www.peerlessgear.com

Specifications

MODEL

ENGINE

Manufacturer/Model

Displacement cu. in. (cc)

Max. Power HP (kW)

Governed RPM

Max. Torque lb · ft (N · m)

Idle RPM

Spark Plug Type

Spark Plug Gap in. (mm)

Crankcase Capacity qt (L)

Crankcase Lubricant

Oil Filter

Fuel Tank Capacity gal (L)

Fuel

Cooling System

Air Cleaner

ELECTRICAL SYSTEM

Battery

Charging System

Charging Output

System Polarity

Ignition

Starter

Interlock Switches

Circuit Breaker(s)

TRANSMISSION

Manufacturer/Model

Steering

Forward Speed Control

Service Brake

B18

Briggs & Stratton Vanguard, 2 Cyl. OHV (Air-Cooled)

34.8 (570)

18 (13.4) @ 3600 RPM

3600

29.5 (40.0)

1750

Champion ® RC14YC

.030 (0.76)

1.5 (1.4)

API SF, SG, SH, SJ or Higher Grade Oil Only with 30W Viscosity

Above 40° F (4° C), or 5W-30 Viscosity Below 40° F (4° C)

Briggs & Stratton P/N 842921

4.0 (15.1)

Automotive Grade Unleaded Gasoline

(87 Octane Minimum, 10% Ethanol Maximum)

Air-Cooled

Remote mounted Cummins/Fleetguard OptiAir TM

(Walker P/N 2090-1 Primary/2090-3 Safety Filter)

12 Volt, 300 CCA

Flywheel Alternator

16 Amp DC (Regulated)

Negative Ground

Magnetron ® Electronic

12 Volt Electric Key and Solenoid Operated

Ignition Lockout by Seat Switch, Transaxle Neutral and Blade

Clutch

Manual Reset (5A)

Auto Reset (30A)

Dual, Independent Hydro-Gear ® ZT3100 Integrated Transaxles

Hand Lever Control / Individual Wheel

Precision Friction Lock Lever, Cruise Control, with

Neutral-Park Position

Dynamic Braking Through Transaxles

3

4

Specifications

MODEL

TRANSMISSION (continued)

Parking Brake

B18

Neutral

Final Drive

Internal Mechanical Cog Lock for each Transaxle

(Single Lever Control)

Transmission Release by Manual Dump Valve

Transaxle Direct to Drive Wheel

Transmission Fluid

Factory Service 20W-50 Multi-Viscosity Motor Oil (Minimum SL Grade Oil)

Transmission Oil Capacity fl oz (L) 79 (2.3)

Transmission Cooling

Oil Filter

Ground Travel Speed

Forward MPH (km/h)

Reverse MPH (km/h)

Cooling Fan Mounted on Drive Pulley

Hydro-Gear ® P/N 52114 (Walker P/N 2026-6)

0-8 (0-13) Infinitely Variable

0-5 (0-8) Infinitely Variable

BLADE DRIVE

PTO Shaft

Blade Drive Clutch and Brake

Sliding Spline Shaft with Two High-Speed U-Joints

Manual Belt Tightener Clutch and Band Brake

[Stops Blades within Five (5) Seconds of Disengagement]

TIRE SIZE

Deck Caster

Drive

8 x 3.00-4 Semi-Pneumatic (Standard)

8 x 3.00-4 Pneumatic 4-Ply (Optional)

18 x 8.50-10 (Pneumatic 4-Ply, Low-Profile)

18 x 7.00-8 (Pneumatic 4-Ply, Optional)

Tailwheel 11 x 4.00-5 (Pneumatic)

TIRE PRESSURE PSI (KPA)

Deck Caster Wheel*

Drive

20 (137)

15 (103)

Tailwheel 20 (137)

* If equipped with optional pneumatic tires

MOWER DECK

Recommended Cut Width

48" Mulch Deck (DM48-2)

Cutting Height

Deck Suspension

48 in. (122 cm)

1.5 to 4 in. (4 to 10 cm)

Independent Torsion-Flex Frame with Caster Wheels and

Counterweight Springs

Specifications

MODEL

DIMENSIONS (Tractor and Mower)

Length in. (cm)

Tractor Only

Tractor Wheel Base

Tractor with Tilted Deck

(Approximate)

Tractor with 48" Mulch Deck

(DM48-2)

Width in. (cm)

Tractor Only (Outside Tire)

Tractor with 48" Mulch Deck

(DM48-2)

Tread Width

Height in. (cm)

Tractor

Weight lb (kg)

Tractor Only

Tractor with 48" Mulch Deck

(DM48-2)

DRIVE BELTS

Engine PTO

Ground Drive

SEAT

B18

62.5 (159)

40 (102)

72 (183)

90.25 (229)

38.5 (98)

49 (125)

30.25 (77)

39.5 (100)

584 (265)

790 (358)

Walker P/N 4230-1 (Matched Pair)

Walker P/N 4230-2

Contour-Molded, with Nylon Backed Vinyl Cover and

Integral Foam Cushion

FRAME/BODY CONSTRUCTION

Frame

Body

Deck

All Welded Unitized Steel Chassis

14 Gauge Steel

11 Gauge Steel

NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time without notice or obligation. The specifications listed are for a standard configuration tractor, and may change with the addition of optional equipment.

5

6

Component Identification

NOTE: Control Identification shown in Operating

Instructions section.

Body Lift

Handle

Forward Speed

Control (FSC)

Friction

Adjustment

Negative (-)

Battery Cable

Positive (+)

Battery Cable

Body Tilt-Up Latch

(Not Visible)

Deck Lift Handle

(Cutting Height Adjustment)

Footrests

Tilt-Up Latch

Counterweight Springs and Protective Covers

Deck Support

Arm

Deck Support

Pins and Height

Adjustment

Hitch Pins

Tilt-Up

Deck Handle

Tilt-Up

Hook

Footrests

Deck

Caster Wheels

Front View and Right Side View

Component Identification

Footrest

Fuel Pickup

Line

Fuel

Gauge

Oil Fill

Dipstick

Tailpipe

Muffler

Muffler

Guard

Left Hand

Drive Wheel

Fuel Tank and Cap Cylinder Head

Cooling Fins

Spread Axle

(Tail Wheel)

Tailwheel Fork and Wheel

Rear View and Left Side View

7

Component Identification

8

LH Transmission

Control Rod

Steering Lever

Spring/Dampeners RH Transmission

Control Rod

LH Transaxle

LH Transaxle

Lockout Arm

Parking Brake

Linkage

Parking Brake

Lever

Fuel Tank Cap

Parking Brake

Linkage

Fuel Tank

Fuel Gauge

Fuel Pump

Roll Over Valve

EVAP Line

Fuel Pickup Line

Fuel Filter

30 Amp

Master Circuit Breaker

(Not Visible)

Oil Fill

Oil Dipstick

Muffler Guard Rubber Bumpers

(Body Support) Muffler Heat

Shield

RH Transaxle

RH Transaxle

Lockout Arm

Transaxle Oil

Expansion

Reservoir

PTO Clutch

Lever

Air Filter

Restriction Gauge

Air Cleaner

Cover Latch

Air Cleaner Cover

Top View (Engine Compartment)

Safety Instructions - Before Operating

Pay particular attention to any information labeled

DANGER, WARNING, CAUTION, IMPORTANT, and NOTE in this manual.

When you see the Safety Alert Symbol ( ), read, understand, and follow the instructions. Fail ure to comply with safety instructions may result in personal injury.

The seriousness or degree of importance of each type of information is defined as follows:

DANGER

An IMMEDIATE hazard that WILL result in severe personal injury or DEATH, if warning is ignored and proper safety precautions are not taken.

WARNING

A POTENTIAL hazard that COULD result in severe personal injury or DEATH, if warning is ignored and proper safety precautions are not taken.

CAUTION

Possible hazards or unsafe practices that

MAY result in MODERATE personal injury or property damage, or machine damage, if warning is ignored and proper safety precautions are not taken.

IMPORTANT: Identifies mechanical information demanding special attention, since it deals with the possibility of damaging a part or parts of the machine.

NOTE: Identifies information worthy of special attention.

Walker Manufacturing cannot predict every potentially dangerous situation. Therefore, items labeled as such in this manual do not cover all conceivable situations. Any person using procedures, tools, or control techniques not recommended by Walker

Manufacturing must take full responsibility for safety.

The Walker Rider Lawnmower has been designed with many safety features to protect the operator from personal harm or injury. However, it is necessary for the operator to use safe operating procedures at all times. Failure to follow safety instructions contained in this manual may result in personal injury or damage to equipment or property.

If you have any questions concerning setup, operation, maintenance, or safety, please contact your authorized Walker Mower dealer or call Walker

Manufacturing Company at (970) 221-5614.

BEFORE OPERATING

1. Read and understand the contents of this

Operator’s Manual before starting and operating the machine.

Become thoroughly familiar with all machine controls and how to stop the machine and disengage the controls quickly.

Replacement Operator’s Manuals are available by sending the Model and Serial Number to:

Walker Manufacturing Company

5925 East Harmony Road

Fort Collins, CO 80528

2. Never allow children to operate rider mower.

Do not allow adults to operate without proper instruction.

3. Clear the area to be mowed of any foreign objects which may be picked up and thrown by cutter blades. Pick up all sticks, stones, wire, and any other debris.

4. Keep everyone, especially children and pets, a safe distance away from the area being mowed.

Do not mow with bystanders in the area.

5. Do not operate the machine barefoot or wearing sandals, sneakers, tennis shoes, or similar lightweight footwear. Wear substantial protective footwear.

9

Safety Instructions - Before Operating

6. Do not wear loose fitting clothing that could get caught in moving parts. Do not operate this machine while wearing shorts; always wear adequate protective clothing, including long pants. Wearing safety glasses, safety shoes, and a helmet is advisable and required by some local ordinances and insurance regulations.

7. Prolonged exposure to loud noise can cause impairment or loss of hearing. Operator hearing protection is recommended.

Wear a suitable hearing protective device, such as earmuffs or earplugs.

8. Keep all protective shields and safety devices in place.

If a protective shield, safety device, or decal is damaged, unusable, or missing, repair or replace it before operating the machine.

9. Be sure interlock switches are functioning correctly, so the engine cannot be started unless the Forward Speed Control lever is in the

NEUTRAL-PARK position, and the PTO clutch is in the DISENGAGED position. Also, the engine should stop if the operator lifts off the seat with either the Forward Speed Control (FSC) out of the NEUTRAL-PARK position or the PTO clutch in the ENGAGED position.

10. Handle gasoline with care.

Gasoline is highly flammable and its vapors are explosive: a. Use an approved fuel container.

b. Never add fuel to a running engine or hot engine (allow hot engine to cool several minutes).

c. Keep matches, cigarettes, cigars, pipes, open flames, or sparks away from the fuel tank and fuel container.

d. Always fill the fuel tank outdoors using care. Fill to about one inch from the top of the tank. Use a funnel or spout to prevent spilling.

e. Replace the machine fuel cap and container cap securely and clean up any spilled fuel before starting the engine.

11. Never attempt to make any adjustments while the engine is running, except where specifically instructed to do so.

12. The electrical system battery contains sulfuric acid. Avoid any contact with skin, eyes, and clothing. Keep the battery and acid out of reach of children.

WARNING

This product can expose you to chemicals including Di-(2-ethylhexyl) phthalate which is known to the State of California to cause cancer, and Di-(2-ethylhexyl) phthalate, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.

P65Warnings.ca.gov.

10

Safety Instructions - Operating

1. Operate the mower only in daylight or in good artificial light with good visibility of the area being mowed.

2. Sit on the seat when starting the engine and operating the machine. Keep feet on the deck footrests at all times when the tractor is moving and/or mower blades are operating. Never operate the tractor without a deck or implement installed.

3. For a beginning operator, learn to steer (maneuver) the tractor with a slow engine speed before attempting any mowing oper ation.

Be aware that, with the front mounted mower configuration, the back of the tractor swings to the outside during turns.

DANGER

Do not mow around overhanging tree branches or bushes at the same height as the operator’s torso and head where inadvertent contact may cause injury.

4. Remember, for an emergency stop, the forward motion of the tractor can always be stopped by pulling the Forward Speed Control (FSC) into the NEUTRAL-PARK position.

5. If the transaxle drive belt breaks during operation, and if the machine is on a slope, the machine will freewheel down the slope. To maintain control, immediately (1) Release the steering levers and simultaneously (2) Move the FSC to the NEUTRAL-PARK position.

When the machine is stopped or moving slowly, engage the parking brake.

NOTE: The emergency stop procedure is exactly the same procedure used to normally stop and park the machine.

6. Disengage the blade clutch and put the FSC in the NEUTRAL-PARK position before starting the engine (an ignition interlock switch normally prevents starting of the machine if these controls are in the OPERATING position).

7. Do not operate machine if the operator presence safety switch system is not working.

Verify proper operation by having the operator lift off the seat with the engine running and moving two controls, one at a time; (1) Move the

FSC lever out of the NEUTRAL-PARK position, and (2) Engage the PTO Clutch. Moving either control should stop the engine immediately.

8. Do not run the engine in a confined area without adequate ventilation. Exhaust fumes are hazardous and can be deadly.

9. Do not carry passengers - maximum seating capacity is one (1) person.

10. Watch for holes, rocks, and roots in the terrain and for other hidden hazards. When mowing tall grass, mow higher than desired to expose any hidden obstacles. Then, clean the area and mow to the desired height.

11. Avoid sudden starts or stops. Before backing the machine up, look to the rear to be sure no one is behind the machine. Watch carefully for traffic when crossing or working near roadways.

12. When moving forward, do not suddenly put the tractor in reverse by rapidly pulling on the steering levers, especially when going downhill, as this can lift the tractor tail wheel off the ground and set up a bucking motion due to operator overcontrol. If bucking does occur, immediately stop the bucking action by pulling the Forward

Speed Control (FSC) lever into the NEUTRAL-

PARK position.

13. Disengage the blade drive when transporting the machine across drives, sidewalks, etc. Never raise the mower deck while blades are rotating.

DANGER

Do not mow or drive the tractor within

5 feet (1.5 meters) of an embankment or retaining wall with drop off.

11

Safety Instructions - Operating

14. The maximum recommended slope operating angle is 15 degrees or 26% grade. When operating the machine on a slope, reduce speed and use caution to start, stop, and maneuver.

To prevent tipping or loss of control of the machine, avoid sharp turns or sudden changes in direction. Do not operate the machine on a slope greater than 15 degrees.

15. Never adjust cutting height with the engine running. Before adjusting cutting height or servicing, disengage the blade clutch (PTO), stop the engine, and remove the ignition key.

Wait for all movement to stop before getting off the seat.

NOTE: The blade/PTO brake should normally stop drive line rotation within five (5) seconds of disengaging the PTO clutch.

16. For side discharge mower decks, do not operate with the grass deflector shield removed.

Keep the deflector in the lowest possible position.

17. When using the tilt-up deck, observe the following: a. Do not move tractor with deck in tilt-up position.

b. Never tilt body forward with deck in tilt-up position.

18. In case of a clogged or plugged mower deck: a. Disengage the blade clutch (PTO); engage the parking brake, and turn the engine off before leaving the seat.

b. LOOK to make sure blade drive shaft movement has stopped before trying to unclog the system.

c. Disconnect the spark plug wires.

d. Never place hands under the deck - use a stick or similar tool to remove clogged material.

19. If the cutting blades strike a solid object or the machine begins to vibrate abnormally, immediately disengage the blade clutch

(PTO), stop the engine, and wait for all moving parts to stop. To prevent accidental starting, disconnect the spark plug wires.

Thoroughly inspect the mower and repair any damage before restarting the engine and operating the mower. Make sure cutter blades are in good condition and blade nuts are torqued to 60 lb · ft (81 N · m) for gear driven decks, and blade bolts torqued to 70 lb driven decks.

· ft (95 N · m) for belt

20. Do not touch the engine or muffler while the engine is running or immediately after stopping the engine. These areas may be hot enough to cause serious burns.

21. When leaving the machine unattended, disengage the blade clutch (PTO), stop the engine, and remove the key.

12

Safety Instructions - Maintenance

1. To prevent accidental starting of the engine when servicing or adjusting the machine, remove the key from the ignition switch and disconnect the spark plug wires.

2. To reduce fire hazards, keep the engine free of grass, leaves, excessive grease, and dirt.

3. Keep all nuts, bolts, and screws tight to ensure the machine is in a safe, working condition.

Check the blade mounting nuts frequently, making sure they are tight.

4. Perform only maintenance instructions described in this manual. Unauthorized maintenance operations or machine modifications may result in unsafe operating conditions.

5. If the engine must be running to perform a maintenance adjustment, keep hands, feet, and clothing away from moving parts. Do not wear jewelry or loose clothing.

6. Always use the proper engine service manual when working on the engine. Unauthorized maintenance operations or modifications to the engine may result in unsafe operating conditions.

7. Altering the equipment or engine in any manner which adversely affects its operation, performance, durability, or use will VOID the warranty and may cause hazardous conditions.

8. Never attempt to disconnect any safety devices or defeat the purpose of these safety devices.

9. Do not change the engine governor settings or overspeed the engine. The governor has been factory-set for maximum-safe engine operating speed.

10. Use genuine factory replacement parts.

Sub stitute parts may result in product malfunction and possible injury to the operator and/or others.

11. Use care when charging the battery or performing maintenance on the battery and electrical system: a. Make sure the battery charger is unplugged before connecting or disconnecting cables to the battery.

b. Charge the battery in a well-ventilated space, so gases produced while charging can dissipate. Make sure the battery vents in the caps are open.

c. Keep sparks, flames, and smoking materials away from the battery at all times. To avoid sparks, use care when removing battery cables from posts.

d. Disconnect both battery cables before unplugging any wiring connectors or making repairs on the electrical system.

IMPORTANT: Keep all applicable manuals immediately accessible to anyone who may operate or service this machine.

13

Safety Instructions

SAFETY, CONTROL, AND INSTRUCTION DECALS

Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual.

1.

2.

8600-28

Location: Each End of Mower Deck

Part Number: 8600-28

1. Warning – thrown object hazard.

● Keep bystanders away from the machine when operating.

● Clear lawn of debris before operating.

● Keep any discharge deflector in place and in the lowest position.

2. Warning – rotating mower blades are a cutting/ dismemberment hazard to hands and feet.

● Keep all body parts away from rotating mower blades.

● Do not step on end of deck.

1.

8600-2

Location: Flex Coupler Guard in Front of Engine

Part Number: 8600-2

1. Warning – entanglement and cutting/dismemberment hazards.

● Keep away from rotating shafts, belts, and other components.

8600-14

1.

Location: Deck Carrier Frame

Part Number: 8600-14

1. Warning – do not operate the machine with the deck tilted up.

1.

Location: Deck Carrier Frame

Part Number: 8600-15

1. Warning – lock deck tilt-up hinge before operating the machine.

1.

1.

Location: Chassis Member Behind Transaxles

Part Number: 9804-1

1. Neutral Lock

● Lift and move into slot to unlock transmission and allow machine to freewheel.

Location: Deck Discharge Shield

(SD Decks Only)

Part Number: 5848-3

1. Warning – thrown object hazard.

● Always keep the discharge shield in the lowest position when operating.

● Do not remove the discharge shield.

14

Safety Instructions

SAFETY, CONTROL, AND INSTRUCTION DECALS

Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual.

2.

3.

4.

5.

7.

8.

<15°

1.

6.

1.

2.

1.

2.

3.

4.

5.

Location: LH Fender

Part Number: 8600-27

1. Throttle

● Move lever forward to increase engine speed; back to idle.

2. Warning – read Operator’s Manual before operating the machine.

3. Warning – wear eye and ear protection when operating the machine.

4. Warning – roll-over hazard.

● Do not operate on slopes greater than 15 degrees.

5. Warning – thrown object hazard.

● Keep bystanders away from the machine when operating.

6. Choke

7. Warning – entanglement hazard.

● Keep all guards in place while engine is running.

8. Parking Brake

● Move lever forward to engage Parking

Brake; back to disengage.

Location: RH Fender

Part Number: 8600-26

1. Warning – do not operate the machine without a deck or other implement attached.

2. Forward Speed Control

● Move lever forward to increase speed; back to stop.

3. Warning – read Operator’s Manual before servicing or performing maintenance.

● Engage parking brake.

● Remove ignition key.

4. Warning – do not engage PTO clutch with PTO shaft disconnected.

5. PTO Clutch Lever

● Move lever forward to engage PTO clutch; back to disengage.

15

Safety Instructions

SAFETY, CONTROL, AND INSTRUCTION DECALS

Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual.

BELT ROUTING

1.

Location: Deck Gearbox Cover

Part Number: 8600-39

1. Warning - stop engine and remove ignition key before adjusting deck cutting height.

60 lb·ft (81 N·m)

1.

8600-9

Location: Gearbox Cover

(Gear Drive Decks Only)

Part Number: 8600-9

1. Tighten blade nuts on gear driven decks to

60 lb · ft (81 N · m).

GROUND DRIVE BELT

WALKER P/N 4230-2

1.

ENGINE/PTO BELT

WALKER P/N 4230-1

4107-12

Location: Rear Body

Part Number: 4107-12

1. Ground drive belt routing

2. Engine/PTO clutch belt routing

2.

1.

8600-5

Location: Rear Body Near Muffler

Part Number: 8600-5

1. Warning – hot surface, do not touch.

Location: Body, Left Side

Part Number: 5082-5

1.

8600-12

Location: Top of Engine

Part Number: 8600-12

1. Warning – carbon monoxide (CO) poisoning hazard.

● CO emitted by a running engine can be deadly.

● Do not operate indoors or in other enclosed areas.

16

Assembly Instructions

SETUP INSTRUCTIONS

Walker Mowers are shipped partially assembled to our distribution network, and are typically assembled by the selling dealer. For any additional assembly besides the following, contact your Walker dealer.

Tire Installation (Tractor)

● Install the drive tires using the eight (8) mounting nuts that are supplied with the Owner’s Packet of materials. Nuts are torqued to 75 to 85 lb

(102 to 115 N · m).

· ft

● Check and adjust the inflation of the tires. The tire inflation recommendations are:

Drive

Tailwheel

Battery Service

= 15 PSI (103 kPa)

= 20 PSI (137 kPa)

Check the battery for electrolyte level and charge.

The electrolyte level should be at the bottom of the vent wells [1/4 to 1/2 in. (6 to 13 mm) above plates].

If the specific gravity is less than 1.225, the battery needs charging. If the battery has been shipped dry, or is wet but needs service, refer to the following instructions.

Battery Location

IMPORTANT: Make sure battery is securely mounted in the frame. A loose battery may cause damage to the case resulting in acid leakage and severe damage to the machine. A hazard may be created by damage to critical working parts and safety systems.

Wet Battery Service

If the battery has been shipped wet, but the electrolyte level is low or the battery needs to be charged then:

1. Fill each battery cell with distilled water to the bottom of the vent wells.

2. Charge battery. Refer to Battery Charging in this section.

Dry Battery Service

DANGER

Activating a battery can be dangerous.

The battery should be taken to a reliable service station, battery store, or power equipment dealer where a trained technician can activate the battery safely. DO

NOT attempt to activate the battery unless you are experienced in battery service work. The following activation and charging instructions are provided for use by a trained battery technician.

DANGER

● Battery electrolyte is a poisonous and cor rosive sulfuric acid solution.

● Avoid spillage and contact with skin, eyes, and clothing - causes severe burns.

● To prevent accidents, wear safety goggles and rubber gloves when working with electrolyte.

● Neutralize acid spills with baking soda and water solution.

To fill (activate) battery with electrolyte (if battery has been shipped dry):

1. Remove the battery cover and hold-down clamp, disconnect the battery cables and lift the battery out of the tray.

IMPORTANT: Battery must be removed from the mower before filling with electrolyte.

17

Assembly Instructions

IMPORTANT: Obtain and use only battery grade sulfuric acid electrolyte with a 1.265 specific gravity to activate the battery. DO NOT use water or any other liquid during initial activation.

2. Remove the filler caps and carefully fill each cell until the electrolyte is just above the plates.

3. After the battery is filled with electrolyte, replace the filler caps and charge the battery. Refer to

Battery Charging.

Battery Charging

DANGER

BATTERIES PRODUCE EXPLOSIVE GASES

● Charge the battery in a well-ventilated area, so that gases produced while charging can dissipate.

● Keep sparks, flames, and smoking mate­ rials away from the battery at all times.

● Make sure the battery cap vents are open after the battery is filled with acid

(check manifold vent on each cap).

● Make sure the battery charger is unplugged before connecting or disconnecting cables to the battery.

1.

Charge the battery at 15 amps for 10 minutes.

DO NOT exceed 20 amps maximum recommended charging rate. Charge until specific gravity is at least 1.250. Total charging time should not exceed one (1) hour.

2.

After charging the battery, adjust the electrolyte level to the bottom of the vent wells [1/4 to 1/2 in.

(6 to 13 mm) above the plates].

IMPORTANT: DO NOT overfill the battery.

Electrolyte will overflow through the vented caps onto parts of the machine and WILL result in severe corrosion.

3.

Install battery.

Battery Installation

IMPORTANT: Make sure battery is securely mounted in the frame. A loose battery may cause damage to the case resulting in acid leakage and severe damage to the machine. A hazard may be created by damage to critical working parts and safety systems.

Install the battery in the mower as shown in Battery

Installation photo. Connect the positive (+) first and then the negative (-) cable to the proper battery terminal [red cable and boot connects to the Positive (+) terminal].

Slide the rubber boot up and over the battery post, making sure it covers the post completely to prevent an electrical short.

WARNING

Make sure the battery cap vents are open.

Improper venting of the battery COULD cause a battery explosion.

(+) Battery Cable

Connection

Battery Clamp

Secured by

Wing Nut(s)

Battery Installation

Mower Deck Assembly

Deck Caster Wheels Installation

1. Remove the bolt, nut, and axle spacer tube from each deck caster wheel fork.

2. Fit the axle spacer tube through the wheel hub, and fit the assembly into the wheel fork.

3. Insert the 3/8-16 x 4-1/2 in. bolt through the wheel fork with the bolt head to the outside and install the 3/8-16 in. Keps nut.

18

Assembly Instructions

4. Tighten the bolt and nut until the inner bearing race bottoms against the inside of the wheel fork (will not turn) while the wheel spins freely without binding.

Axle Spacer Tube

PTO Shaft Guard Installation

Position the shaft guard as shown and mount with two (2) 1/4-20 x 1/2 in. bolts.

Carrier Frame

Tube Sockets

Axle Bolt

Deck Caster Wheel Installation

5. Grease the caster pivot bearings - one grease fitting for each pivot.

Deck Discharge Deflector Shield Installation

(Side Discharge Models Only)

Attach the side discharge deflector shield using two

(2) 3/8-16 x 1-1/4 in. bolts, 3/8-16 ESNA nuts, and

3/8 in. wave spring washers. The wave washers fit between the two hinging surfaces. Tighten the nuts until the shield moves freely but is not loose.

WARNING

DO NOT operate the machine without the grass deflector shield attached and in the lowest possible position.

Attach Shield

Attach

Guard

PTO Shaft Guard Installation

Tilt-Up Roller Wheel Installation

Mount the two (2) tilt-up roller wheels on the brackets on the rear skirt of the deck housing using the

P/N 8490 axle bolt, 3/8 in. wave spring washer and

3/8-16 in. Whiz locknut. Tighten the axle bolt until the wheel rolls freely, but is not loose.

Roller Wheel Installation

Roller

Wheels

Deck Discharge Shield Installation

19

Assembly Instructions

Mower Deck Installation on Tractor

Deck Installation

1. Lightly grease each deck support arm (2) on the tractor. Refer to Mower Deck Installation photo for location of deck support arm.

4. Install the hitch pin through the hole on the end of each support arm to lock the deck in place

(re fer to Deck Counterweight Spring Installation photo). Two (2) hitch pins are included in the Owner’s Packet of materials.

Counterweight Springs

Clip Onto Body

With Body Tilted Up

Hitch Pins

Lock Deck on

Support Arms

Deck Support

Arms

Mower Deck Installation

2. Engage the deck carrier frame tube sockets on the tractor support arms (refer to PTO Shaft

Guard Installation photo for socket location).

Slide the deck onto the support arms approximately 3 in. (76 mm).

3. Align and connect the splined PTO shaft and socket halves, as shown in PTO Shaft Connection photo. The PTO shaft has a pilot end to ease alignment of shaft; fit shaft end into socket and rotate shaft until the splines line up as indicated by arrows, then slide together. Slide the deck the rest of the way on the deck arms.

Arrows on Shaft and Tube

(Used to Align When Sliding Together)

Grease Deck

Support Arm(s)

Spring Tension Adjustment Nut

Located Under Lower

Spring Hook

Deck Counterweight Spring Installation

5. Raise the mower body (instead of lifting the front of deck) and clip the counterweight springs to the receptacle on front of body. Lower the body to tension the springs. (Refer to Deck

Counterweight Spring Installation photo.)

6. With the counterweight springs connected, the weight on the deck caster wheels should be

15 to 25 Ib (6.8 to 11.3 kg); this adjustment is preset at the factory. If required, the spring tension can be adjusted by tightening or loosening the elastic stop nuts located underneath the lower spring hook, or contact your local dealer if additional help is required. Refer to Deck

Counterweight Spring Installation photo.

PTO

Connection

PTO Shaft Connection

20

Assembly Instructions

Deck Leveling

The mower deck and support frame are jig welded; within normal tolerances, very little, if any, shimming should be required to level the deck. Tire pressure will influence the levelness of the deck. Check the tire pressure of all pneumatic tires as a possible cause of the deck not being level.

1. Position mower on a smooth, level surface. Set the cutting height to the highest position - 4 in.

(102 mm) - for easy access under the deck to measure blade height. Refer to ADJUSTING

CUTTING HEIGHT in Operating Instructions .

NOTE: A block of wood cut 4 in. (102 mm) high is a convenient gauge to measure blade height above ground during the leveling process.

WARNING

The machine must be shut off during this procedure.

2. Check the side-to-side level. Rotate each blade sideways and measure the distance from blade tip to ground on each side. If measurements vary more than 1/8 in. (3 mm), add a washer shim under the deck support pins on the low side to level the deck.

3. Check the front-to-rear level. Rotate the blades to point forward.

Measure the distance from blade tip to ground on the front and rear. The rear of the blade should be 1/8 to 1/4 in. (3 to 6 mm) higher than the front of the blade; shim the rear

(or front) deck support pins equally to achieve at least 1/8 in. (3 mm) difference.

4 in. (102 mm)

Wood Block

Should be 1/8 in. (3 mm) to 1/4 in. (6 mm) higher at the rear of the blade

Should not vary more than 1/8 in. (3 mm) side-to-side

4 in. (102 mm)

Wood Block

Deck Leveling

21

Assembly Instructions

PREOPERATING CHECKLIST

Before operating the mower for the first time, and as a routine before daily operations, it is important to make sure the mower is properly prepared and ready for operation. The following is a list of items to be checked. (For a mower with frequent operation, some of these items will not need to be checked every day, but the operator should be aware of the condition of each.)

For proper fuel and lubricants refer to Specifications.

FILL FUEL TANK

Fill the fuel tank using clean, fresh automotive grade unleaded gasoline (87 octane minimum, 10% ethanol maximum).

DANGER

Handle gasoline with care. Gasoline is highly flammable and its vapors are explosive. Use safe refueling procedures:

● DO NOT fill fuel tank with the engine running.

● If the engine is hot, allow to cool before refueling.

● Use an approved fuel container.

● Fuel the mower outdoors.

● DO NOT smoke while refueling.

● Avoid spilling fuel; use a funnel or spout.

● DO NOT overfill the fuel tank; fill up to about 1 in. (25 mm) below the top of tank.

IMPORTANT: DO NOT permit dirt or other foreign matter to enter the fuel tank. Wipe dirt from around the filler cap before removing. Use a clean fuel storage container and funnel.

IMPORTANT: DO NOT mix oil with gasoline.

Always use fresh, automotive grade unleaded gasoline. DO NOT use gasoline containing greater than

10% ethanol. DO NOT use additives, such as carburetor cleaners, deicers, or moisture removing agents. DO NOT use gasoline blended with methyl alcohol.

CHECK ENGINE CRANKCASE OIL LEVEL

Check the engine crankcase oil level before use and after each 8 hours of continuous operation. Refer to LUBRICATION for Checking Engine Crankcase

Oil Level in Maintenance Instructions.

CHECK AND SERVICE ENGINE AIR CLEAN-

ER SYSTEM

● Check air filter restriction gauge to make sure the yellow indicator disk is in the safe operating

(green) range.

● Check condition, cleanliness, and security of the complete air cleaner system (inspect air filter paper element every 100 hours ). For detailed procedures, refer to CLEANING the Engine Air

Cleaner System in Maintenance Instructions.

CHECK ENGINE COOLING SYSTEM

Check that the engine cooling air intake screen is free of obstruction by grass clippings or debris and clean if required. Also, cylinder head cooling fins should be inspected and cleaned if any build-up of debris is noted. Refer to CLEANING the Cylinder

Head Cooling Fins in the Maintenance Instructions for this procedure.

Check performance of the cooling system by starting the engine, holding a hand adjacent to the cylinder heads, and feeling the cooling airflow.

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

CHECK SECURITY OF DRIVE TIRE MOUNT-

ING NUTS

The eight (8) Drive Tire mounting nuts should each be torqued to 75 to 85 lb · ft (102 to 115 N · m).

INSPECT THREE (3) DRIVE BELTS

Engine/PTO (2) and Ground Drive.

CHECK HYDROSTATIC TRANSAXLE OIL

LEVEL

Refer to LUBRICATION for Transaxle Fluid Level in Maintenance Instructions.

22

Assembly Instructions

CHECK FUNCTION OF SAFETY INTERLOCK

SWITCHES

Refer to Operating Instructions to check for proper operation of safety switches, both during engine starting and with the operator leaving the seat with tractor moving forward or with the mower blades engaged.

CHECK TIRE PRESSURE

Deck Caster Wheel* = 20 PSI (137 kPa)

Drive

Tailwheel

= 15 PSI (103 kPa)

= 20 PSI (137 kPa)

* If equipped with optional pneumatic tires

CHECK AND CLEAN GRASS BUILDUP UN-

DERNEATH MOWER DECK

Refer to CLEANING the Grass Buildup in Mower

Deck Housing in Maintenance Instructions for deck tilt-up and deck cleaning information.

DANGER

Never operate cutter blades with deck in raised position because it is hazardous.

The tilt-up deck can be secured in the raised position by unlocking the deck lock levers on each side of the carrier frame and inserting the deck hook into the tilt-up latch on the tractor body. Before operating the tractor, make sure to re-engage the deck lock levers after lowering the deck to the normal operating position.

Tilt-Up Handle

Tilt-Up Hook and

Latch Connected

CAUTION

Do not operate machine with deck tilt-up pivot joint unlocked.

DANGER

Do not operate the mower with deck in tiltup position. Do not move the tractor with the deck in the tilt-up position.

CHECK MOWER BLADE CONDITION,

SHARPNESS, AND SECURITY OF MOUNT-

ING

The blade mounting nuts on gear driven decks should be torqued to 60 lb

(95 N ·

· ft (81 N · m), and the blade mounting bolts on belt driven decks torqued to 70 lb · ft m). If blade sharpening is required, refer to

CHECKING/SERVICING for Sharpen Mower

Blades in Maintenance Instructions.

ADJUST MOWER CUTTING HEIGHT, IF RE-

QUIRED

Position the hitch pins in the four deck support pins.

Refer to the “Cutting Height Adjustment” decal on the deck gearbox cover.

PERFORM ANY ADDITIONAL PROCEDURES called for on the MAINTENANCE SCHEDULE

CHART in Maintenance Instructions.

Tilt-Up

Latch

Deck Lock

Lever

Tilt-Up

Hook

Deck Secured in TILT-UP Position

23

Operating Instructions

CONTROL IDENTIFICATION, LOCATION, AND

FUNCTION

CAUTION

Before operating the mower, become familiar with the location and function of all operator controls. Knowing the location, function, and operation of these controls is important for safe and efficient operation of the mower.

Ignition Switch

The ignition switch is located on the right front of the body and is used to start and stop the engine. The switch has three positions: “O” is the OFF position,

ON (RUN) is the position the key returns to after starting, and “S” is the START position. When starting the engine, turn the key clockwise to the “S” position.

Body Lift

Handle

Do not hold the key in the “S” position longer than

10 seconds. If the engine does not start, return the key to the “O” position for at least 60 seconds before making a restart attempt. Prolonged cranking can damage the starter motor and shorten battery life.

Release the key when the engine starts, and it will return to the ON (RUN) position. To stop the engine, rotate the key counterclockwise to the “O” position.

OFF ON

Parking

Brake

Ignition Switch

START

Choke

(Not Visible)

Throttle

Blade Clutch

(PTO)

Forward Speed

Control (FSC)

Body

Latch

Ignition

Switch

Hourmeter

Operating Controls

Steering

Levers

5 Amp

Circuit Breaker

24

Operating Instructions

Engine Choke

The choke control lever (black knob) is located on the left side of the seat. To start a cold engine, move the choke control forward to the ON position. After engine starts, move the choke control toward the

OFF position, keeping enough choke to allow the engine to run smoothly as it warms up. As soon as possible, move the choke to the OFF position. A warm engine requires little or no choke for starting.

IMPORTANT: Make sure the choke is in the OFF position during normal engine operation; running with the choke in the ON position CAN damage the engine.

Engine Throttle

The throttle control lever (red knob) is located on the left side of the seat and is used to control engine speed. Moving the lever forward toward the FAST position increases engine speed; moving it backward toward the IDLE position decreases engine speed.

Throttle Choke

Choke and Throttle Location

Forward Speed Control (FSC)

Forward Speed Control (FSC) has two functions:

One is to set forward travel speed, and the other is to establish the NEUTRAL-PARK position. When the FSC lever is moved into the FORWARD position, a friction lock holds any forward speed setting from 0 to 8 mph (0 to 12.9 km/h). The ground speed is proportional to the lever position; the further the lever is advanced forward, the faster the tractor moves. It is not necessary to hold the FSC in position since the friction lock maintains the selected lever position. Pulling back on the steering levers overrides the FSC setting and slows or stops forward travel. Releasing the steering levers allows the tractor to resume forward travel at the speed set by the FSC lever. To stop and park the machine, the

FSC lever is moved backward to the NEUTRAL-

PARK position.

Steering Levers

Each drive wheel is controlled by its own independent steering lever, for both steering function and

FORWARD/REVERSE motion. The FSC lever sets the maximum forward speed, and also sets the forward position of the steering levers. The steering levers operate only with a backward pulling movement of the lever, which causes the drive wheel for that lever to first slow down, stop, and then reverse with a full backward lever stroke. The levers are released to the FORWARD position for “straightahead” ground travel.

NOTE: Pushing forward on the steering levers will not cause any change in tractor motion - there will be no steering lever reaction and there will be no machine damage.

Blade Clutch (PTO)

The blade clutch lever is located on the right side of the seat behind the right fender and is used to engage and disengage the mower blades. The blade clutch lever has two positions. Pushing the lever

DOWN engages the PTO that drives the mower blades. Pulling the lever UP disengages the PTO and engages the blade brake.

25

Operating Instructions

The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers

LEFT WHEEL

STEERING LEVER

RIGHT WHEEL

STEERING LEVER

FORWARD SPEED

CONTROL LEVER (FSC)

Forward Position

(No Control Change)

Full Forward

Ground Speed

Position

Neutral-Park

Position

Intermediate

Ground Speed

Position

Reverse Drive

Wheel Motion

Position

Neutral-Park

Position

Fast

Throttle

Position

Idle

Position

THROTTLE ON

Position

<15°

1.

2.

CHOKE

OFF

Position

Engaged

Position

Engaged

Position

PARKING

BRAKE

Disengaged

Position

Disengaged

Position

Operating Controls (Top View from Drivers Point of View)

BLADE CLUTCH

(PTO)

26

Operating Instructions

Circuit Breaker

A 5 amp, manual-reset circuit breaker is located on the right front of the body. The button pops out if the circuit breaker trips. This circuit breaker protects the safety circuits and relays. An auto-reset 30 amp master circuit breaker is located in the rear left of the chassis, and protects the charging system.

Parking Brake

The parking brake functions by locking a detent arm to a cog in the hydraulic motor rotor. Moving the lever FORWARD engages the parking brake; moving the lever BACKWARD releases the brake.

IMPORTANT: Stop the tractor completely before engaging the parking brake. The parking brake uses a positive mechanical lock similar to the PARK position on an automotive automatic transmission.

If the tractor is moving when the brake is engaged, it will result in sudden stoppage and possible internal damage to the transaxle.

NOTE: If pressure on the parking brake (e.g., parked on a hill) makes it impossible to release the parking brake with the parking brake lever, move the mower gently forward or backward to allow the brake detent to release.

Disengaged

Position

Parking Brake Disengaged

Transaxle Lockout Arms

The transaxle lockout arms disengage the transaxles. By lifting the arms up and locking them into place with the shoulder on the arm in the chassis notch, the transaxles are released to permit freewheeling. By releasing the arms and recessing them back toward the chassis, the transaxles are engaged for normal operation. The transaxle arms in the LOCKOUT position are used to enable moving the machine without the engine running (e.g., for service). Refer to TRANSAXLE LOCKOUT in this section for operating instructions.

NOTE: The transaxle lockout arms ends should be completely retracted against the chassis, otherwise operation of the transaxle may be erratic.

Engaged

Position

Parking Brake Engaged Transaxle

Lockout Arms

Transaxle Lockout Arm Location

27

Operating Instructions

Body Latch

The tractor body hinges forward for maintenance access and is latched down in the OPERATING position. To raise the body, pull back on body latch and lift body using the lift handle on the rear of the body.

Body

Latch

*** In normal operating conditions, oil changes in

100-hour intervals are acceptable. Walker and the engine manufacturers recommend engine oil changes every 50 hours in extremely dirty or dusty conditions or for units with less than 100 hours annual use.

NOTE: The blinking hour glass on the display means that the meter is operating properly.

28

Body Latch

Hourmeter

The hourmeter, which is located on the right front of the body, displays operating time accumulated while the PTO (blade drive) clutch is engaged.

The hourmeter provides maintenance reminders after certain hours of operation. The hourmeter screen will start flashing the reminder one hour prior to the recommended interval and will continue until one hour after the recommended interval (two hours).

The hourmeter does not have a manual reset function.

Procedure

Oil Change

(Break-In)**

Lubricate and Check

Levels

Interval*

4-6 Hours

24-26 Hours

Reminder

C

H

G

OIL

LUBE

Oil Change 49-51 Hours***

C

H

G

OIL

* These intervals reflect the actual time that the reminder will flash (one hour prior to and one hour after the recommended interval).

** This reminder is only used one time.

Hourmeter

Operating Instructions

STARTING THE ENGINE

CAUTION

Before operating the mower, read and understand all Safety Instructions and Operat­ ing Instructions .

WARNING

NEVER run the engine in an enclosed or poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas.

1. Before attempting to start the engine, make sure the operator is in the seat, the Forward

Speed Control is in NEUTRAL-PARK position, and the blade clutch and parking brake are DIS-

ENGAGED.

NOTE: Release parking brake to prevent extra load on the starter if the transmission neutral is slightly out of adjustment.

CAUTION

A safety interlock switch system PRE-

VENTS CRANKING the engine with either the Forward Speed Control out of neutral or the blade clutch (PTO) engaged. If the engine cranks otherwise, the safety system is not working and should be repaired or adjusted before operating the mower. DO

NOT disconnect safety switches; they are for the operator’s protection.

2. Move the choke lever to the ON position and move the throttle 1/4 to 1/2 open (toward FAST ).

Turn the ignition switch to the START position to start the engine. Release the key to ON

(RUN) position as soon as the engine starts.

NOTE: The choke may not be required if the engine is warm.

IMPORTANT: DO NOT crank the engine continuously for more than 10 seconds at a time. If the engine does not start, turn the key to the

OFF position and allow a 60 second cool-down period between starting attempts. Failure to follow these guidelines can damage the starter motor and shorten battery life. Contact your

Walker dealer or authorized engine dealer for additional help.

3. After the engine starts, gradually move the choke to the OFF position, keeping enough choke on to allow the engine to run smoothly as it warms up. As soon as possible, move the choke to the OFF position.

IMPORTANT: Make sure the choke is in the

OFF position during normal engine operation; running with the choke in the ON position CAN damage the engine.

ADJUSTING GROUND SPEED AND STEERING

CAUTION

Learn to START, STOP, and MANEUVER the mower in a large, open area.

If the operator has not operated a ma chine with LEVER STEERING OR DUAL TRANSing and ground operation should be learned and practiced until the operator is completely comfortable handling the ma chine BEFORE ATTEMPTING

TO MOW.

DANGER

Keep feet on footrests at all times when the machine is moving. Never operate the tractor without a deck or implement installed.

29

Operating Instructions

1. Move the FSC out of NEUTRAL-PARK position to the desired forward speed. DO NOT hold for ward on steering levers. It is not necessary to hold the FSC lever in position since a friction lock maintains the selected lever position (and forward travel speed).

WARNING

If the transaxle drive belt breaks during operation, and if the machine is on a slope, the machine will freewheel down the slope. To maintain control, immediately (1)

Release the steering levers and simultaneously (2) Move the FSC to the

NEUTRAL-PARK position. When the machine is stopped or moving slowly, engage the parking brake.

NOTE: This is exactly the same procedure used to normally stop and park the machine.

CAUTION

An operator presence switch (seat switch) will cause the engine to stop if the FSC is out of the NEUTRAL-PARK position and the operator is not in the seat. The function of this switch should be checked by the operator raising off the seat with the tractor moving forward; the engine should stop. If the safety sys tem is not working, it should be repaired or replaced before operating the mower. DO NOT disconnect the safety switches; they are for the operator’s protection.

NOTE: If the FSC lever will not stay in the selected position, the friction lock needs to be adjusted. Refer to ADJUSTMENTS for Step 7 -

Forward Speed Control Friction Adjustment in the Maintenance Instructions.

2. Steer by pulling the lever on the side of desired direction of turn, e.g., pull the LH lever to turn left.

To minimize the possibility of overcontrol, use only one hand on both steering levers.

Beginning Recommendations are:

♦ Learn operation of the mower in an open area away from buildings, fences, and obstructions. Learn operation on flat ground

BEFORE operating on slopes.

♦ Start maneuvering the mower with SLOW engine speed and SLOW Forward Speed

Control setting until familiar with all operating characteristics.

♦ Remember it is not necessary to hold the steering levers forward (a unique Walker feature); always PULL on the levers for steering or for reverse motion of the mower.

♦ Learn to operate the mower with your left hand on the steering levers and right hand on Forward Speed Control. The use of two hands on the steering levers tends to cause overcontrol.

♦ Learn to operate the steering levers with smooth action. Jerky movements are hard on the transaxle and lawn. For sharp turns, do not allow the inside wheel to stop and twist on the grass. Pull the steering le ver controlling the inside wheel into reverse for a smooth “rolling” turn (one wheel roll ing forward while the other rolls backward).

♦ Practice maneuvering the mower until you can make it go exactly where you are aiming.

♦ Remember, for an emergency stop, or in case of loss of control, machine movement can always be stopped quickly by pulling the Forward Speed Control into the NEU-

TRAL-PARK position.

30

Operating Instructions

Pull Steering

Levers With

Left Hand

Forward Speed Control

(FSC)

Keep Feet On Footrest

When Moving

Correct Operator Hand Position on the Controls

3. Reverse direction of the mower by pulling both levers backward.

NOTE: Smooth action on the steering levers will produce smooth mower operation. Remember to keep the engine and ground speed slow until learning the control response.

WARNING

When moving forward, DO NOT suddenly put the tractor in reverse by rapidly pulling on the steering levers, especially when going downhill, as this can lift the tractor tail wheel off the ground and set up a bucking motion due to operator overcontrol. If bucking does occur, immediately stop the bucking action by pulling the Forward

Speed Control (FSC) lever into the NEU-

TRAL-PARK position.

4. The FSC may be adjusted forward for faster ground speed and backward for slower ground speed. When mowing, ground speed should be adjusted to match the load on the cutter blades, i.e., as the engine pulls down in heavy cutting, pull back on the FSC lever to reduce ground speed. Adjusting ground speed helps maintain a balance between engine power and blade speed for high-quality cutting action.

5. Stop ground travel by pulling both steering le vers backward to the NEUTRAL position

(trac tor not moving) and then moving the FSC lever to the NEUTRAL-PARK position.

NOTE: If the tractor creeps forward or backward with the FSC lever in the NEUTRAL-PARK position, the transmission control needs to be adjusted. Refer to ADJUSTMENTS for Step 3 -

Neutral Position Adjustment in the Maintenance

Instructions.

ENGAGING THE BLADE DRIVE

1. Set the engine throttle at about 1/3 speed. DO

NOT attempt to engage the blade clutch at high engine speeds. This will drastically shorten drive belt life. Use only moderate engine speed when engaging the blade clutch.

2. Engage the blade clutch by moving the blade clutch lever forward SLOWLY.

For disengagement, move the blade clutch lever backward

SLOWLY.

CAUTION

An operator presence switch (seat switch) will cause the engine to stop if the blade clutch is engaged and the operator is not in the seat. The function of this switch should be checked by the operator raising off the seat and engaging the blade clutch; the engine should stop. If the switch is not working, it should be repaired or replaced before operating the mower. DO NOT disconnect the safety switches; they are for the operator’s protection.

IMPORTANT: DO NOT engage the blade clutch when transporting the mower across drives, sidewalks, loose materials, etc. DO NOT engage the blade clutch with the PTO shaft disconnected

(the mower deck removed from tractor).

31

Operating Instructions

Engaged

Position

Blade Clutch Engaged

Disengaged

Position

Blade Clutch Disengaged

CAUTION

If the cutting blades strike a stationary object while mowing, stop the mower immediately, disconnect the spark plug wires, lift the deck, and inspect the deck and blades thoroughly for damage. Make sure that the blade timing has not been dis turbed (the blades should be at 90 degrees to each other). Refer to REPLACING/RE PAIRING the Blade Overload Shear Bolts in

Mainte­ nance Instructions

if blades are out of time.

Also, make sure the blade retain ing nuts are torqued to 60 lb·ft (81 N·m).

STOPPING THE MACHINE

1. Pull the steering levers to the NEUTRAL position and then move the FSC lever backward to the NEUTRAL-PARK position.

2. Slow the engine to a fast idle; put the throttle in the 1/2 throttle position.

3. Disengage the blade clutch.

IMPORTANT: DO NOT disengage the blade clutch with high engine speed (above 1/2 throttle) since the brake action on the blade drive will cause premature wear of the brake band.

WARNING

A brake stops the cutter blades from freewheeling within five (5) seconds after disengaging the clutch. If the brake system malfunctions and the blades do not stop within five (5) seconds, the brake should be repaired or replaced before operating the mower. Contact your Walker dealer, or refer to ADJUSTMENTS of

Clutch Disengagement/Brake Action in

Maintenance Instructions.

4. Turn the ignition switch OFF.

When stopping the engine, do not reduce the throttle below 1/2 speed. Since the engine is equipped with a fuel shutoff solenoid, stopping at low idle may cause engine run-on or backfiring.

WARNING

Remove the key from the ignition switch when leaving the mower unattended. This will prevent children and inexperienced operators from starting the engine.

32

Operating Instructions

5. Engage the parking brake by moving the lever forward. Also, engaging the parking brake is recommended when stopping or parking the machine in a confined space with little tolerance for movement.

IMPORTANT: The hydrostatic transmissions lock to prevent the mower from rolling freely with the engine stopped. However, if the mower is parked on a slope, it is necessary to ENGAGE the parking BRAKE to prevent the mower from creeping. This is due to a small amount of slippage in the hydrostatic transmissions, especially when transmission fluid is warm.

WARNING

If the transaxle drive belt breaks during operation, and if the machine is on a slope, the machine will freewheel down the slope. To maintain control, immediately

(1) Release the steering levers and simultaneously (2) Move the FSC to the NEU-

TRAL-PARK position. When the machine is stopped or moving slowly, engage the parking brake.

NOTE: The emergency stop procedure is exactly the same procedure as used to normally stop and park the machine.

ADJUSTING CUTTING HEIGHT

WARNING

The engine must be stopped before adjusting cutting height. Disengage the blade clutch (PTO), stop the engine, and remove the ignition key. Wait for all move ment to stop before getting off the seat.

Cutting height is adjusted by positioning the four (4) re tainer hitch pins in a series of six vertical holes on the deck support pins. Lift handles have been provided on each end of the deck to assist in raising the deck while positioning the hitch pins. Cutting heights range from 1.5 in. (38 mm) [top holes] to

4 in. (102 mm) [bottom holes] in 1/2 in. (13 mm) incre ments.

Deck Support

Pin

Lift Handle

Hitch Pin

Washer

Cutting Height Adjustment

33

Operating Instructions

TRANSAXLE LOCKOUT

IMPORTANT: DO NOT TOW this mower faster than 2 mph (3.2 km/h) with the transaxle lockout engaged. Towing can produce excessive internal pressure and damage the transaxle(s).

To move the mower with the engine NOT running

(dead battery, maintenance, etc.), the transaxles need to be unlocked (released).

1. Raise the body.

2. Pull up on each transaxle lockout arm and move toward the center of the machine to engage the step that holds the arm in the UP (unlocked) position.

3. The mower will “freewheel” with the arms in the

LOCKOUT position. The levers must be in the highest position to completely unlock the transaxles.

Transaxle Lockout Arm

Transaxle Lockout Arm

Transaxle Lockout Arm - Normal Operating

Position

RECOMMENDATIONS FOR MOWING

DANGER

Do not mow around overhanging tree branches or bushes at the same height as the operator’s torso and head where inadvertent contact may cause injury.

Transaxle Lockout Arm - Freewheel Position

4. After moving the mower, release the arms, placing them down in the normal OPERATING position. The transaxle lockout arm ends should be completely retracted against the chassis, otherwise operation of the transaxle may be erratic.

Avoid Low Hanging Branches

34

Operating Instructions

IMPORTANT: Operate the engine at full throttle when mowing, to allow the engine to produce full horsepower and to increase efficiency of the engine cooling system.

● Keep the mower deck and discharge shield clean.

● Mow with sharp blades.

A dull blade tears the grass (resulting in poor lawn appearance) and uses extra power (slowing the mowing speed).

● It is preferable to cut grass when it is dry and not too tall.

Mow frequently and do not cut grass too short. (For best appearance, cut off 1/3 or less of existing grass height.)

● When mowing, operate the engine at full throttle for the best cutting action. Mowing with a lower engine RPM causes the mowing blade to not cut clean and tear the grass. The engine is designed to be operated at full speed.

● When mowing in adverse conditions (tall and/or wet grass), mow the grass twice. Raise the mower to the highest setting - 4 in. (102 mm) - for the first pass and then make a second pass cutting to the desired height.

● Use a erations.

slow setting on the FSC for trimming op-

● Make sure the mower is leveled properly for a smooth cut. Refer to Deck Leveling in Assembly In­ structions .

● Use an alternating stripe mowing pattern for best appearance and vary the direction of the stripe each time the grass is mowed to avoid wear patterns in the grass.

● Avoid damage to the grass by slipping and skidding of the drive tires. Use smooth control movements of the steering levers since the transaxles are “power boosted controls” and jerk ing the levers can easily slip the tires. For sharp turns, do not allow the inside wheel to stop and twist on grass; pull inside steering lever into reverse for a smooth “rolling” turn (one wheel rolling forward while the other rolls backward).

● When using a side discharge mower deck, the side discharge deflector shield must not be removed and must be kept in the lowest possible position to deflect grass clippings and thrown objects down ward. Orient the side discharge away from side walks or streets to minimize cleanup of clippings. When mowing close to obstacles, orient the side dis charge away from obstacles to reduce the chance of damage to property by thrown objects.

Discharge

Shield

Side Discharge Deflector Shield in

Lowest Position

35

Operating Instructions

● When operating on a slope, reduce speed and use caution to start, stop, and maneuver. Avoid sharp turns or sudden changes in direction. The maximum recommended slope operating angle is 15 degrees or 26% grade.

Maximum

Recommended

Slope -

Do Not Operate on Steep Slopes

860014

60 lb·f t (81 N ·m)

8600-9

15°

52 in.

Maximum Recommended Slope

16 in.

DANGER

Do not mow or drive the tractor within 5 feet

(1.5 meters) of an embankment or retaining wall with drop off.

RECOMMENDATIONS FOR TILT-UP DECK

OPERATION/TRANSPORT

To avoid potential deck and/or tractor damage while using the tilt-up deck, the following recommendations are offered:

● Do not move the tractor with the deck in the tiltup position since both the roller wheels (on the back of the deck) may be damaged by moving the tractor.

The tilt-up configuration should only be used when the tractor is parked.

● The tractor body should never be tilted forward with the deck in the tilt-up position. This can cause the deck to unhook from the tractor and fall with considerable force, potentially causing deck or tractor damage and/or bodily injury.

● When transporting a tractor with the deck in the tilt-up position (on a truck or trailer), the deck should be secured to the vehicle with a strap or rope (stop vertical movement). This will prevent the deck from bouncing on the rear roller wheels (causing breakage). This will also prevent the deck from unhooking from the tractor and falling, potentially causing deck or tractor damage. Damage to other items parked in front of the deck may also occur.

36

5 FT

MINIMUM

No Driving Zone

Maintenance Instructions

CAUTION

Maintenance procedures requiring special training or tools should be performed by a trained technician.

MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL B18

Service Item

25

Hours

100

Hours

400

Hours Yearly

Every

2 Years

Check Engine Crankcase Oil Level x

Daily

Check/Clean Engine Air Cooling System*

Clean Grass Buildup Under Deck x x

Service Mower Blades

Check Security of Air Filtration Components

Check Air Filter Restriction Gauge

Lubricate Grease Fittings and Oil Points* x x x

Check Transaxle Fluid x x x Check Tire Pressure

Check Drive Belts

(Engine/PTO, Ground Drive)

Check Deck Gearbox Oil Seals x

Check Safety Switch System

Check Battery Electrolyte Level x x x x Change Engine Crankcase Oil and Oil Filter**

Check Security of Drive Tire

Mounting Nuts (75 to 85 lb · ft)

Check Blade Brake Action x

Check/Adjust Blade Clutch

Clean Transaxle Housing

Check Air Filter Element***

Check/Regap Spark Plugs

Change Transaxle Oil and Filter Δ x x x x x

Replace Air Filter Element and Safety Filter***

Replace Fuel Filter

Check/Adjust FSC Friction Lock x x x

Check Fuel Lines and Clamps

Check PTO U-Joints for Wear/Looseness

Service Battery

Check Transmission Control Setting

Clean Engine Cooling Fins x x x x x x

Replace Fuel Lines and Clamps

Replace Dust Ejection Valve***

Replace Ignition Wires x x x

* More often in extremely dusty or dirty conditions

** Change engine oil after first 8 hours of operation of a new engine (break­in period)

*** Air cleaner is remote mounted Cummins/Fleetguard OptiAir™ unit, replace filter(s) every 400 hours

Δ Change transaxle oil after the initial break-in period of 75-100 hours operation

54

54

55

52

40

53

48

41

44

53

Ref.

Page

39

46

50

53

52

52

55

46

54

59

55

54

55

49

55

49

54

45

49

54

66

51

37

Maintenance Instructions

IMPORTANT TIPS FOR CARE OF THE

BRIGGS & STRATTON ENGINE

Fuel System

● Fuel must be clean -- free from water, dirt, and organic material.

● Change the fuel filter on a regular basis and when contamination is suspected or found in the fuel.

Starting/Stopping

● Start engine with the throttle advanced off idle

(1/4 to 1/2 throttle). This will aid starting, especially in cold weather.

● Keep the battery fully charged.

● Match crankcase oil viscosity to the ambient temperature, allowing the engine to crank faster and start easier.

● Allow engine to run at idle for a few seconds be fore stopping engine to avoid run-on or backfiring.

Cooling System

CAUTION

DO NOT use water or a pressure washer to clean the cooling system on an air-cooled engine; mud may form under the cooling shroud on the cylinder head and cooling fan resulting in engine overheating.

● Keep engine air intake screen and cylinder head fins free of grass clippings, chaff, and dirt. Inspect intake screen and cooling fins for cleanliness and no damage.

● Check performance of the cooling system by starting the engine, holding a hand adjacent to the cylinder head, and feeling the cooling airflow.

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

BRIGGS & STRATTON TIPS

● Operate the engine at full speed when mowing.

This allows the engine to produce full horsepower and move more cooling air through the engine cooling fins.

Air Cleaner System

● Use only Cummins/Fleetguard air cleaner elements. Aftermarket elements may not seal in the air cleaner housing, allowing dirt to enter the engine.

Also, aftermarket filters often skimp on the filtration media and require more frequent replacement (see following instructions).

● Use the air filter restriction gauge to indicate the need to service the air filter.

● DO NOT overservice or frequently “disturb” the air filter.

A dirty air filter actually cleans better than a new one. Changing and cleaning the air filter too often can ac tually reduce filter efficiency and increase the oppor tunity for traces of dust to enter the engine.

Wait until the element really needs servicing as indicated by the air filter restriction gauge.

● When the air filter element is removed or re placed, make sure all dust is cleaned out of the air cleaner housing and hose.

Use a damp cloth and wipe the interior of the canister and hose clean (a lit tle dirt left here will be sucked into the engine and reduce engine life). When the filter is reinstalled, make sure the element is held tight and straight in the canister for proper seating and sealing.

● Periodically check the air intake hose for cuts, nicks, etc., and the hose clamps for tightness.

Oil

● Single viscosity or multi-viscosity oils may be used with the viscosity matching ambient tempera tures for the engine operating conditions. This will aid starting in cold weather and assure proper lu brication in hot weather.

● Use only Briggs & Stratton oil filters. Aftermarket filters may not seal properly and/or have the incorrect pressure relief valve for proper lubrication.

38

Maintenance Instructions

LUBRICATION

WARNING

DO NOT attempt to lubricate the machine with the engine running. Disengage the

PTO clutch, shut off the machine, and remove the ignition key.

Proper lubrication is an important maintenance procedure. It reduces wear and makes the machine quieter and easier to operate.

Engine Oil

Engine Break-In Oil

No special break-in oil is required. The engine is serviced with 10W-30, Service Class SJ oil from the factory. Change the oil after the initial engine breakin period of 8 hours.

Thereafter, change oil after every 100 hours of operation.

Checking Engine Crankcase Oil Level

Check the engine crankcase oil level before use and after each 8 hours of continuous operation.

IMPORTANT: The importance of checking and maintaining the proper crankcase oil level cannot be overemphasized. Check the oil level BEFORE

EACH USE.

1. Park the mower on a level surface with the en gine stopped.

Also, make sure the engine is cool and oil has had time to drain into the sump [allow at least five (5) minutes after stopping the engine].

IMPORTANT: NEVER check or add oil with the engine running.

2. Before removing the dipstick, clean the area around the dipstick to keep any dirt or debris out of the engine.

3. Remove the dipstick, wipe off with a clean rag, then reinsert the dipstick into the tube and push all the way down.

LUBRICATION

4. Remove the dipstick again and check the oil lev el on the dipstick. The oil level should be within the “Operating Range” on the dipstick

(between the LOW mark and the FULL mark).

IMPORTANT: DO NOT operate engine without a sufficient oil supply in the crankcase. DO NOT operate with oil level below the LOW mark or above the FULL mark on the dipstick.

Operating

Range

{

LOW

Mark

FULL

Mark

Dipstick Operating Range

5. If additional oil is needed, refer to Specifications for proper crankcase lubricant. Fill up to, but not above, the FULL mark on the dipstick.

IMPORTANT: DO NOT overfill the crankcase

(oil above FULL mark) as this CAN result in engine overheating, loss of power, and possible en gine damage.

39

Maintenance Instructions

Changing Engine Crankcase Oil/Oil Filter

Change the engine crankcase oil and the oil filter after every 100 hours of operation as follows:

1. Park the mower on a level surface with the en gine stopped.

The engine oil should be warm before draining. If not warm from operation, start the engine and run a few minutes to warm the oil.

2. Before removing the dipstick, clean the area around it to keep any dirt or debris out of the en gine.

3. Remove the dipstick and oil drain plug, and drain the oil into a suitable container. Be sure to allow ample time for complete drainage.

Oil Fill

Dipstick

Dipstick and Oil Fill

(View from Above Left Side of Tractor)

Oil Drain

Oil Drain Location

(View from the Rear of Tractor)

LUBRICATION

Oil Filter

Oil Filter Location

(View from the Rear Right Side of Tractor)

4. Before removing the oil filter, clean the area around the filter to keep dirt and debris out of the engine.

5. Remove the old oil filter and wipe off the filter mounting surface on the engine.

6. Apply a thin coating of new oil to the rubber gasket on the replacement oil filter.

IMPORTANT: Use ONLY oil filters from the en gine manufacturer (Briggs & Stratton

P/N 842921). After market oil filters may not seal properly and/or may not have the correct pressure relief valve for proper lubrication.

7. Install the new oil filter on the engine. Turn the filter clockwise until the rubber gasket contacts the sealing surface, then tighten an additional

1/2 to 3/4 turn.

8. Reinstall the draing plug. Make sure it is tightened to 10 lb•ft (14 N•m).

9. Remove the fill cap on the engine valve cover and fill the crankcase with new, clean oil. Use only crankcase lubricants recommended by the en gine manufacturer. Refer to

Specifications

in this manual or the engine owner’s manual.

Use the recommended oil viscosity for the expected ambient temperature. Oil with the correct vis cosity will aid starting in cold weather and assure proper lubrication in hot weather.

Fill to FULL mark on the dipstick; crankcase capacity is 1.5 quarts (1.4 liters) when changing oil and filter.

40

Maintenance Instructions

IMPORTANT: Check the dipstick reading before adding the last 1/2 pint of oil and fill only to the FULL mark.

The oil level should never be over the FULL mark on the dipstick; overfilling

CAN result in engine overheating and loss of power.

10. Start the engine and check for oil leaks around the oil filter. Stop the engine, recheck the oil level, and add oil if necessary. (When the engine is first operated with a new oil filter, the oil level drops slightly as the filter is filled with oil.)

Grease Fitting and Oil Point Lubrication

Lubricate the grease fittings and oil points after ev ery

25 hours of operation. Lubricate more often when operating in dusty or dirty conditions. Use SAE general purpose lithium or molybdenum base grease for grease fittings and light machine oil (SAE 10) to lubricate oil points. Lubricate the locations shown in the Chassis and Deck Lubrication Points illustration.

NOTE: PTO universal joints (on the deck and tractor) require routine lubrication after every 25 hours of running time.

NOTE: The flange bearings on the PTO drive shaft are sealed and do not require periodic maintenance.

LUBRICATION

PTO U-Joint Lubrication (Tractor)

DANGER

Never perform the following steps with the engine running.

1. Remove deck from tractor.

2. Position the PTO U-joint grease fitting pointing down, as shown below. To rotate the PTO, the blade brake will need to be released by pushing the blade clutch lever slightly forward while simultaneously turning the PTO.

Grease Fitting

Grease Fitting Location

3. Use a grease gun to add grease until it seeps out of the seals. Wipe away any excess grease.

DO NOT over grease.

Hold Tube Up to

Access Grease Fitting

Using Grease Gun

41

Maintenance Instructions

Ident

No. Location

Lubrication No.

Type Places

1 Deck Caster Wheel Fork Pivot Grease

2 Blade Spindle

3 Pivot Assembly, Tilt-Up Deck

4 Deck Support Arm Socket

Grease

Grease

Δ

2

2

Grease

5 Universal Joint Shaft Assembly Grease** 1

4

2

6 Tee Gearbox, Deck

7 Blade Drive Gearbox

8

9

Steering Lever Pivot

Deck-to-PTO Coupling

(Grease Spline Slide Area)

10 Universal Joint Tube Assembly Grease** 1

11 Deck Support Arm Pivot

12 FSC Lever Pivot

13 Body Latch Pivot

14 Clutch Actuator Push Rod

15 Ground Drive Idler Pivot

16 PTO Clutch Lever Pivot

17 Transaxle Oil Reservoir

18 Tail Wheel Caster Fork Pivot

19 Rear Axle Pivot

20 Rear Wheel Bearing

21 Throttle Control Cable Ends

Oil* 1

Oil* 2

Grease

Grease

Grease

Grease

Oil

Grease

Grease

Grease

Grease

Grease

Oil

2

1

2

1

1

1

1

1

Oil/20W-50 1

Grease 2

1

2

2

1

2

LUBRICATION

Ident

No. Location

Lubrication

Type

No.

Places

22 Choke Control Cable Ends

23 Engine / Oil Filler

24 Brake Band Pivot Pins

25 PTO Belt Tightener Pivot

26 Parking Brake Clevis

27 Parking Brake Lever

28 Choke Control Pivot

29 Throttle Control Pivot

Oil 2

Oil*** 1

Oil

Grease

Oil

Grease

Oil

Oil

2

1

2

1

1

1

* Gearboxes are permanently lubricated and sealed requiring no scheduled lubrication. Oil level should be checked only when an oil leak is noted. Refer to Mower Deck Gearbox

Lubrication in this section.

** Grease every twenty-five (25) hours.

*** Refer to Engine Oil located on page 39.

Δ Belt Driven Decks Only

NOTE: DS42 Belt Drive and DS42 Tilt-Up Decks and shown for reference. For other Deck Lubrication Points, refer to

Deck and Carrier Frame Illustrated Parts

Manual.

1

2

42

3 4 5 4 3

Lubrication Points for Optional Belt Driven Decks (DS42 Belt Drive Shown)

Maintenance Instructions

7

1

1

4

3

3

25

21 & 29

11

22 & 28

26

27

26

14

21

18

22

24 23

20

Chassis and Deck Lubrication Points (DS42 Shown)

LUBRICATION

4

3

3

8

9

10

11

7

6

5

12

13

14

15

16

17

18

19

43

Maintenance Instructions

Mower Deck Gearbox Lubrication

On gear driven decks, the mower deck gearboxes

(tee gearbox and blade drive gearboxes) are connected as a unitized assembly, and oil flows freely between them. The gearboxes are permanently lubricated (oil filled) and sealed requiring no scheduled lubrication. However, the gearbox oil seals should be checked every 25 hours for indication of an oil leak; particularly the lower seals on the blade drive gearboxes should be inspected, since they operate in a dirty environment. If an oil leak is noted, replace the oil seal and relubricate the gearbox assembly as follows:

1. Remove gearbox cover (footrest). Deck orientation should be the normal operating position.

Blade Drive

Gearboxes

Tee

Gearbox

Mower Deck Gearboxes

(Shown with Gearbox Cover

Removed for Clarity)

2. Clean the area around the individual gearbox cover plates to prevent contaminants from entering the gearcase.

3. Remove the screws securing the cover plates on the blade drive gearboxes.

4. Check the level of lubricant in the gearboxes. If the lubricant is low, add SAE E.P. (Extreme

Pressure) 80W-90 (API GL-5) gear lube until the oil level is up to (submerges) the horizontal shaft in the gearbox (shaft parallel to cover plate).

NOTE: In case the gearboxes are completely drained of oil, approximately 5 fl. oz. (15 cl) of oil per gearbox is required to refill the gear drive assembly.

LUBRICATION

NOTE: Since the gearboxes are connected as a unit by connector tubes, it is necessary to add oil slowly. Allow a few minutes after adding oil for the oil to flow throughout the assembly and the oil level to stabilize before reassembly.

IMPORTANT: DO NOT overfill the deck gearboxes. The gearbox assembly is not vented, and overfilling with oil will cause excessive pressure and result in oil leaks.

5. Check condition of the cover gasket and replace if worn or damaged. Reinstall gearbox cover plates; torque screws to 24 lb · in. (3 N · m).

Mower Deck Spindle Lubrication

For belt driven decks, lubricate each deck spindle grease fitting every 25 hours.

Use SAE general purpose lithium or molybdenum base grease for grease fittings.

Check Transaxle Fluid Level

● The transaxle oil lubrication is SAE 20W-50 (API

Service Class SL or higher) engine oil.

● Inspect both transaxle cases and hoses every 25 hours of operation for visible leaks.

after

● The fluid level of the transaxles can be checked visually by looking at the fluid level in the expansion reservoir. When the transaxles are cold, the fluid level in the expansion reservoir should be between

1/4 in. and 1/2 in. (0.64 cm and 1.27 cm).

Reservoir Cap

Cold Level

Expansion Reservoir Location

44

Maintenance Instructions

Transaxle Oil and Filter Change

Change the transaxle oil after the initial break-in period of 75-100 hours.

Thereafter, change oil every 400 hours of operation as follows:

1. Thoroughly clean the exterior of the transaxle housing before servicing. Remove expansion reservoir cap to allow venting. Using a 1/4 in. hex wrench, remove the plug on the lower inside of each transaxle allowing the oil to drain.

2. Remove the oil filter guard, remove and replace the oil filter using an oil filter wrench. Tighten filter by turning filter 3/4 to 1 turn after gasket contacts the filter base surface. Reinstall the oil filter guard. (Refer to Transaxle Oil Drain

Plug, Filter, and Guard Location illustration.)

Oil Filter

Oil Filter

Guard

Oil Drain

Plug

Transaxle Oil Drain Plug, Filter, and

Guard Location

3. Reinstall drain plugs.

4. Remove the oil reservoir hose attached to the elbow on top of the transaxles and remove the elbows to access the oil fill openings.

5. Fill the transaxles with 20W-50 (API Service

Class SL or higher) oil through the opening where the elbows were. Fill up to the opening.

6. Before reinstalling the elbows, screw the locking nut on the elbows down until they are snug

(the o-ring on the elbow will be to the bottom of the o-ring groove).

Elbow

LUBRICATION/CLEANING

Screw Locking

Nut Down

Reinstall Transaxle Elbows

7. Reinstall the elbows. When the elbow begins to be snug, position the elbow as it was when removed and tighten the locknut. Reinstall reservoir hoses to elbows.

8. Fill reservoir to 1/4-1/2 in. (6-13 mm) with

20W-50 (API Service Class SL or higher) oil.

9. Start and drive the unit for 1-2 minutes.

10. If the transaxles sound noisy or have poor steering response, there may be air trapped in the transaxles. Follow purge instructions below.

11. If oil needs to be added refer back to steps 5-10.

12. To purge air from transaxle, raise tractor and block with tires off the ground. With engine running, slowly move Forward Speed Control forward and backward 5 to 6 times. Turn off engine and check oil level and add if needed.

Repeat procedure until transaxles operate at normal noise levels and move smoothly in forward and reverse.

45

Maintenance Instructions

CLEANING

CAUTION

If a pressure washer is used on the exposed working parts, avoid water on the electrical parts and the engine cooling system.

Engine Air Cooling System

Cooling Air Intake Screen

To prevent engine overheating and possible engine damage, clean grass clippings, chaff and dirt from the rotating engine cooling air intake screen after every 8 hours of operation. In certain mowing conditions (dry grass, leaves, tree “cotton”, etc.) it may be necessary to check and clean this area several times each day to prevent engine overheating. Also, visually check inside cylinder head shroud and between cylinder head fins for material packed in this area which would prevent cooling airflow; remove shroud and clean as required.

CLEANING

Cylinder Head Cooling Fins

It is essential for performance and longevity of the air-cooled engine to keep the cylinder head cooling fins clean and free of obstruction. After every 8 hours of operation, check the performance of the cooling system by starting the engine, holding a hand adjacent to the cylinder head, and feeling the cooling airflow. If there is little or no airflow, clean the cooling fins as follows:

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

Check Airflow with Hand

46

Rotating Engine Cooling

Air Intake Screen

Keep Rotating Engine Cooling

Air Intake Screen Clean

CAUTION

Operating the engine with a blocked air intake screen, dirty or plugged cooling fins, and/or cooling shrouds removed will cause engine damage from overheating.

Check Cooling System Airflow

1. Inspect accessible cooling fins and clean with compressed air or backpack blower as needed.

If the buildup is excessive, refer to step 2.

2. If the dirt and debris cannot be removed with compressed air, it will be necessary to remove the engine from the chassis and remove the engine shroud for thorough cleaning. See your authorized Briggs & Stratton dealer for this service.

CAUTION

DO NOT use a pressure washer to clean the cooling system on an air-cooled engine, mud may form under the cooling shroud on the cylinder head and cooling fan.

Maintenance Instructions

Cooling

Fins

Inspect and Clean Cylinder Head Cooling Fins

(Viewed from Rear of Tractor)

IMPORTANT: Yearly , it is good maintenance practice to remove the engine cooling shroud and clean the cylinder head cooling fins and cooling fan thoroughly to prevent overheating and extend engine life. Make sure cooling shroud is reinstalled properly. This procedure will require removing the engine from the chassis.

Clean these areas of dirt and debris

Clean Cooling Fins and Fan

(Remove Engine Shroud)

CLEANING

47

Maintenance Instructions

CLEANING

Engine Air Cleaner System

Cummins/Fleetguard OptiAir™ Air Cleaner

A remote mounted Cummins/Fleetguard OptiAir™ air cleaner provides the air filtering function. The paper filter element slides over an outlet tube inside the air cleaner canister with radial sealing action, eliminating the possibility of dust leaks due to improper filter installation. Intake design, internal baffling, and a dust ejection valve provide dust separation and automatic precleaning action. Daily or frequent servicing of the air cleaner is not required. Use the air filter restriction gauge on the air cleaner outlet to indicate when the air filter needs servicing -- a yellow indicator will show when the filter is overly restricting airflow into the engine.

IMPORTANT: Use only Cummins/Fleetguard air filter elements for replacement (Walker 2090-1 and

2090-3). Aftermarket filters may not seal properly or filter efficiently.

IMPORTANT:

Air Cleaner

Band

Cummins/Fleetguard

Air Cleaner

Safety

Filter

Air Cleaner

Cartridge

The Cummins/Fleetguard air cleaner uses a dry paper-type air filter element.

apply oil to the paper element.

Air Filter

Push Button to Reset

Indicator After Service

Air Filter Restriction Gauge Location

Cummins/Fleetguard

Air Cleaner Cover

Dust Ejection

Valve

NEVER

Restriction Gauge

Flex

Hose

Air Filter

Restriction Gauge

Hose

Clamps

Engine Air Cleaner System Components

Engine

48

Maintenance Instructions

Inspect the paper element after every 100 hours of service and replace the element and safety filter every 400 hours (or when dirty or damaged). More frequent replacement may be required when operating in extremely dusty conditions as indicated by the air filter restriction gauge. Service the air cleaner as follows:

1. Lift Mono Latch Twist Lock™ and twist the

OptiAir™ cover to the left into the “open” position to remove the air cleaner cover. Wash the cover and dust ejection valve. Check that these components are in good condition. The dust ejection valve is subject to wear and deterioration and should be inspected carefully and replaced every 2 years or when damaged. The lips of the valve should close and fit together; any cracks, deformation, or wear in the valve is cause for replacement.

2. Remove the filter element by pulling it out of the canister. There will be some initial resistance as the filter seal breaks loose and slides off of the outlet tube. Gently move the end of the filter up and down and side to side or twist to loosen the seal. Use gentle action to minimize the amount of dust dislodged as the filter is removed.

3. Discard the filter element if excessive air flow restriction has been indicated by the air filter restriction gauge and proceed to Step 6. Clean the filter element by gently tapping on a flat, hard surface.

If excessive restriction still exists after cleaning the element, it should be replaced.

NOTE: Use care when cleaning the filter element. The filter element and/or seal surface may be damaged by tapping too hard or hitting on an uneven surface or sharp edge. Washing the element in water or cleaning solution is not recommended.

Do not try to clean the element with compressed air. Remember. replacing a filter is less expensive than replacing a dusted engine.

4. Use a bright light inside the element to inspect for damage. Check the element very carefully for pin holes or other damage that will allow dirt to leak through the paper media. Replace element if necessary.

CLEANING

5. Check the condition and resilience of the radial sealing surface (inside of the open end) of the filter. Replace the filter if any cracks, tears, or other damage to the sealing surface are noted.

6. Without removing, visually inspect the condition of the safety filter for damage or holes. The safety filter should only be removed for replacement every 400 hours (or when dirty or damaged).

IMPORTANT: Prior to removing the safety filter, make sure the inside surface of the air cleaner canister is clean. This will minimize the risk of dirt entering the outlet tube which can cause premature engine wear.

7. After removing the safety filter, use a clean, damp cloth and wipe the interior of the air cleaner canister clean. Use special care to clean both the inside and outside surfaces of the outlet tube.

IMPORTANT: Any dust left on the inside of the outlet tube will go into the engine and cause wear.

8. Check the outside surface of the outlet tube for smoothness and cleanness (this is the sealing surface).

9. Insert and seat the safety filter and OptiAir™ el ement carefully into the canister, applying pres sure at the outer rim of the filter; not at the flexible center. Make sure the filter element is completely in place before installing the cover.

NOTE: DO NOT use petroleum based lubricants on the sealing surfaces of the filter; use tal cum powder or dry silicone lubricants if required for filter installation.

Outlet Tube

OptiAir™

Filter Element

Canister

Safety Filter Radial Sealing

Surface

Air Filter Element Replacement

49

Maintenance Instructions

10. Install the cover with the word “DOWN” properly oriented to the bottom of the canister. Twist the

OptiAir™ cover to the right and put into the

“closed” position.

Mono Latch

Twist Lock™

Tilt-Up Handle

Tilt-Up Hook and

Latch Connected

CLEANING

2 3

Tilt-Up

Latch

Deck Lock

Lever

DOWN

Tilt-Up

Hook

Orient to Bottom of Canister

Dust Ejection

Valve

Proper Orientation of Air Cleaner Cover

11. Check the air intake hose for cuts, nicks, cracks, etc., and the hose clamps for tightness.

12. Reset the air filter restriction gauge (press button on the end of the indicator).

Grass Buildup in Mower Deck Housing

DANGER

Before raising or removing the mower deck for cleaning, stop the engine, remove the ignition key, and disconnect the spark plug wires.

1. Raise the deck lock lever handle on each side of the carrier frame and pull out to release carrier frame for tilting action.

2. Using the carrier frame lift handle, raise deck to the TILT-UP position and insert the deck hook into the tilt-up latch on the tractor body.

Deck Secured in TILT-UP Position

DANGER

Do not operate the mower with deck in tiltup position. Do not move the tractor with the deck in the tilt-up position.

3. Clean grass buildup underneath the deck using a pressure washer (and scraper if required).

NOTE: If the buildup is severe, it may be easier to clean the deck by removing the deck assembly from the tractor and standing the deck assembly on its “nose”.

NOTE: While some degree of material buildup in the mower deck housing can be tolerated, a point is finally reached where cutting quality deteriorates and clogging begins to occur because of too much buildup on the baffling and housing.

4. Lower the deck to the normal operating position and re-engage the deck lock levers.

CAUTION

Do not operate machine with deck tilt-up pivot joint unlocked.

50

Maintenance Instructions

Transaxle Housing

Keeping the housing on the transaxles clean and free of obstruction is essential to avoid overheating the transaxle fluid and shortening transaxle life.

The housing should be checked every 100 hours; and cleaned if necessary.

To clean the housing, use compressed air and/or a pressure washer. Pay close attention to any oily dirt build up on the transaxle housings. This may be the result of an oil leak. If an oil leak is noticed, contact your local Walker dealer.

CLEANING

IMPORTANT: In case an oil leak develops on the input shaft, the cooling fan blowing dusty air and oil on the transaxle will quickly cover the housing and pack the cooling fins with oily dirt.

If this condition occurs, contact your dealer immediately to avoid overheating and dam aging the transaxles.

An additional procedure in maintaining transaxle cooling is to inspect the cooling fans. Replace the fan(s) if blades are missing or damaged.

Cooling

Fins

Cooling

Fans

Transaxle Cooling Fans

Transaxle Housing and Cooling Fins

51

Maintenance Instructions

CHECKING/SERVICING

DANGER

To prevent accidental starting of the engine when servicing or adjusting the machine, remove the key from the ignition switch and disconnect the spark plug wires.

Security of Air Filtration Components

NOTE: The following inspection is only an external inspection and should be done without “disturbing” the filtration components.

On a daily basis, visually inspect the external condition of the complete air cleaner system. The following items should be inspected:

1. Check the Cummins/Fleetguard OptiAir™ air cleaner canister for damage. Make sure the cover is in place and the cover latch is secure - do not run the engine without the air cleaner cover in place and secure.

2. Inspect the air intake hose for cracks, nicks, cuts, etc., and check the hose clamps for tightness.

3. Check to make sure the air filter restriction gauge is in place and hose connections are secure.

Battery

NOTE: For initial battery service during setup, refer to Battery Service in Assembly Instructions .

IMPORTANT: Make sure battery is securely mounted in the frame. A loose battery may cause damage to the case resulting in acid leakage and severe dam age to the machine. A hazard may be created by damage to critical working parts and safety systems.

Electrolyte Level

The battery electrolyte level should be checked after every 25 hours of operation. To check electrolyte level:

1. Remove battery cell filler caps.

CHECKING/SERVICING

2. Check the electrolyte level. If the level is below the bottom of the vent well, fill with distilled water to the bottom of the vent wells [1/4 to 1/2 in.

(6 to 13 mm) above the plates].

3. Replace filler caps.

IMPORTANT: DO NOT overfill the battery. Electrolyte will overflow through the vented caps onto parts of the machine and WILL result in severe corrosion.

Cleaning the Terminals

If battery terminals are corroded, remove battery from the mower. Using a wire brush, remove corrosion with a solution of one part baking soda and four parts water. Rinse with clean water. Coat the terminals with petroleum jelly or terminal protector spray to retard further corrosion.

Charging the Battery

DANGER

BATTERIES PRODUCE EXPLOSIVE GASES

● Charge the battery in a well-ventilated area, so that gases produced while charging can dissipate.

● Keep sparks, flames, and smoking ma­ terials away from the battery at all times.

● Make sure the battery cap vents are open

(check manifold vent on each cap).

● Make sure the battery charger is unplugged before connecting or disconnecting cables to the battery.

Check the battery charge by measuring the specific gravity of electrolyte; if specific gravity is less than

1.225, the battery will need to be charged as follows:

1. Charge the battery at 15 amps for 10 minutes.

DO NOT exceed 20 amps maximum recommended charging rate. Charge until specific gravity is at least 1.250. Total charging time should not exceed one (1) hour.

2. After charging the battery, use distilled water to adjust the electrolyte level to the bottom of the vent wells [1/4 to 1/2 in. (6 to 13 mm) above the plates].

52

Maintenance Instructions

CHECKING/SERVICING

Tire Pressure

Inflate tires to pressures shown below:

Deck Caster Wheel* = 20 PSI (137 kPa)

Drive

Tailwheel

= 15 PSI (103 kPa)

= 20 PSI (137 kPa)

* If equipped with optional pneumatic tires

Wheel Nut Torque

Check the eight (8) Drive Tire mounting nuts. Every

100 hours they should each be torqued to

75 to 85 lb · ft (102 to 115 N · m).

Sharpen Mower Blades

Check mower blade(s) for straightness, sharpness, condition of the cutting edge, and balance every 10 hours of operation (or more often when mowing abrasive type grass or operating on sandy soils). Replace blades if worn, bent, cracked, or otherwise damaged (refer to REPLACING/RE-

PAIRING the Mower Blades in this section). Use the following procedure to check and sharpen blades:

NOTE: Keep blades sharp - cutting with dull blades not only yields a poor mowing job but slows the cutting speed of the mower and causes extra wear on the engine and blade drive by pulling hard.

1. Stop the engine, remove ignition key, and disconnect the spark plug wires before raising the mower deck to service blades.

2. Raise the deck and secure it in the TILT-UP po sition. Refer to CLEANING the Grass

Buildup in Mower Deck Housing in this section for deck raising instructions.

DANGER

NEVER operate cutter blades with the deck in the raised position.

NOTE: PTO shaft must be disconnected before checking blades for straightness.

3. Check the blades for straightness by marking the blade tip position inside the deck housing, and then rotating the opposite end of the blade to the same position and comparing. If the difference in blade tip track is more than 1/8 in.

(3 mm), the blade is bent and should be replaced.

WARNING

DO NOT try to straighten a blade that is bent. NEVER weld a broken or cracked blade. ALWAYS replace with a new blade to assure safety.

4. If the blade cutting edge is dull or nicked, it should be sharpened. Remove blades for sharpening by grasping the end of the blade using a rag or a thick, padded glove, while loosening and removing the nut, lock washer, and flat washer that mounts the blade.

5. Grind cutting edge at the same bevel as the original. Sharpen only the top of the cutting edge to maintain sharpness.

NOTE: Blades can be sharpened with an electric blade sharpener, conventional electric grinder, or a hand file.

CAUTION

ALWAYS wear eye protection and gloves when sharpening a blade.

Sharpen at

Original 30° Angle

Intersection

Wear Area

30°

Wing

Tip

Do Not Grind or

Sharpen on Underside

Mower Blade Profile for Sharpening

6. Check blade balance by positioning the blade horizontally on a blade balancer or use a nail or shaft through the center hole. If either end of the blade rotates downward, grind (remove) metal on that end until the blade will balance.

The blade is properly balanced when neither end drops. Balance of a blade is generally maintained by removing an equal amount of material from each end of the blade when sharpening.

53

Maintenance Instructions

Blade Balancer

Blade Balanced on Magnetic

Wall-Mounted Balancer

7. Mount the blade with wing tips pointing up into the housing. For gear driven decks reinstall the blade, washer, lock washer, and nut. Tighten the nut to 60 lb·ft (81 N·m).

For belt driven decks reinstall the spacer (if applicable), blade, washer, and bolt. Tighten the bolt to 70 lb·ft

(95 N·m).

Drive Belts

Raise the body and inspect the condition of the three (3) drive belts after every 25 hours of operation -- engine/PTO drive and ground drive. If the belts show signs of cracking or deteriorating, the belts should be replaced.

Refer to REPLACING/

REPAIRING the Drive Belts in this section.

Mower Deck Gearbox Oil Seals

The mower deck gearbox seals should be inspected every 25 hours for evidence of oil leaking; particularly the lower oil seal on the blade drive gearbox.

This seal is protected by the trash guard on the blade hub and seal protector plate on the housing, but is still vulnerable to seal damage due to operating in an adverse environment. The mower blade must be removed for inspection of the seal, so it is recommended to inspect the gearbox seals when blades are removed for sharpening.

If an oil leak is noted, the seal should be replaced and the gearbox assembly relubricated. Refer to LUBRI-

CATION for Mower Deck Gearbox Lubrication in this section.

CHECKING/SERVICING

Spark Plugs

Every 100 hours of operation, remove the spark plugs, inspect, clean, and reset the gap (or replace with new plugs ). Before removing the spark plugs, clean the area around the base of the plugs to keep dirt and debris out of the engine. Clean spark plugs with a wire brush. DO NOT use an abrasive grit type cleaner. If the electrodes are burned short or pitted, replace plugs with Champion® type RC14YC (or equivalent). Check spark plug gap with a wire-type feeler gauge and set the gap at 0.030 in. (0.76 mm).

Reinstall and tighten to between 18 and 22 lb·ft (24 to 30 N·m).

Breaker Points

The Briggs & Stratton engine is equipped with electronic ignition. No breaker points, maintenance, or adjustments are necessary with this system. Contact an authorized Briggs & Stratton engine dealer in case of ignition failure.

Fuel Lines and Clamps

Every year, inspect the fuel line from the tank to engine for deterioration or damage. Also, inspect the fuel line clamps for tightness.

Good preventive maintenance calls for complete replacement of fuel lines and clamps every two (2) years.

Blade Brake Action

WARNING

It is important to check and maintain blade brake action for safe operation of the machine.

Check the function of the cutter blade brake by engaging the blade clutch (PTO), operating the engine at full throttle, then disengaging the clutch and measuring how quickly the blades stop. Watch the rotation of the blade drive shaft as a visual indication that movement has stopped. If the brake is working properly, all rotation will stop five (5) seconds after disengagement of the clutch. If the brake system malfunctions - blades do not stop in five (5) seconds - adjust or repair the brake before operating the mower. Refer to ADJUSTMENTS for Clutch

Disengagement/Brake Action, Step 2 Blade Brake

Band Adjustment, on page 68.

54

Maintenance Instructions

PTO U-Joints

The PTO U-joints should be inspected yearly for looseness and wear. If either is noticed, the respective shaft or tube should be replaced. A worn U-joint can cause vibration and extensive damage to the

PTO and the whole machine.

Ignition Wires

Good preventive maintenance calls for complete replacement of spark plug wires every two (2) years.

Safety Switch System

WARNING

It is important to check and maintain the safety switch system for safe operation of the machine.

There are three (3) safety interlock switches on the tractor; Seat Switch, FSC Neutral-Park Switch, and

PTO Switch.

If any of the following conditions occur during starting or operating, a safety interlock switch may be malfunctioning. Contact your Walker dealer for troubleshooting and/or replacement.

● With or without an operator in the seat, the engine starts with the Forward Speed Control (FSC) and/or the PTO engaged.

● With an operator in the seat, the engine starts but dies soon after the Forward Speed Control

(FSC) or PTO is engaged.

● Without an operator in the seat, the engine starts and continues to run with the Forward Speed

Control (FSC) and/or PTO engaged.

● With an operator in the seat, the Forward Speed

Control (FSC) and PTO disengaged, but the starter will not engage.

CHECKING/SERVICING

Forward Speed Control Friction Lock

The FSC friction lock is designed to hold the selected forward travel speed when the steering levers are moved and yet the friction is not too heavy to make moving the FSC control difficult (too much friction). The procedure for checking the FSC friction lock is as follows:

1. With the engine off, place the FSC in the full

FORWARD position and pull both steering levers back; the FSC lever should not move. If the FSC lever moves back when the steering levers are pulled back, the friction needs to be increased.

2. With the steering levers held back, move the

FSC lever back from the FORWARD position.

With a proper amount of friction adjusted, the

FSC lever should move back with a slight amount of resistance (friction). If the FSC lever movement is “stiff”, the friction needs to be decreased.

If the FSC friction lock needs to be adjusted, refer to

ADJUSTMENTS for Step 7 - Forward Speed Con- trol Friction Adjustment in this section.

Transmission Control Setting

On a yearly interval or when an out-of-adjustment condition is observed, check the transmission control for proper function as follows:

Neutral-Park

With the mower parked on level ground, start and run the engine, first at idle and then normal operating speeds. With the FSC in the NEUTRAL-PARK position, there should be no movement of either drive tire. If the tire(s) are “creeping” forward or reverse, refer to ADJUSTMENTS for the Neutral

Function Adjustment - Step 3 in this section.

Straight Ground Tracking

Check for straight ground track by driving on a smooth, level surface with hands off the steering levers. St the FSC at different speeds and observe if the mower moves in a straight line (use a cement joint or other line on the ground for reference). If the machine is drifting to the right or left, refer to

ADJUSTMENTS for Straight Tracking Adjust- ment - Step 5 in this section.

55

Maintenance Instructions

REPLACING/REPAIRING

DANGER

To prevent accidental starting of the engine when replacing parts or repairing the machine, remove the key from the ignition switch and disconnect the spark plug wires.

IMPORTANT: ALWAYS use genuine factory replacement parts. Substitute parts CAN result in product malfunction and possible injury to the operator and/or others.

REPLACING/REPAIRING

Drive Belts

There are three (3) individual belts on the machine:

● Engine/PTO Belt (Matched Set of 2)

● Ground Drive Belt

The belts may be removed and replaced using the procedures described on the following pages.

56

Ground

Drive Belt

Engine/PTO Belts

(Matched Set of 2)

Belt Locations

Maintenance Instructions

REPLACING/REPAIRING

Engine/PTO Belt

1. To remove an engine/PTO belt: a. Remove wire lock pins (4), open belt guards.

Fixed Idler

Pulley

Upper LH

Guard

Wire Lock Pins

Lower LH

Guard b. With the PTO cutch disengaged, roll the belt off the clutch idler pulley and remove the belt.

Clutch Idler Pulley Wire Lock Pin

Right Hand

Guard

Engine/PTO Belt

(Matched Set)

PTO

Pulley PTO Guard

Engine/PTO Belt (Belt Guards Open) (Engine Hidden for Clarity)

2. To replace an engine/PTO belt: a. Reverse the removal procedure to replace an engine/PTO belt.

b. Secure wire on lock pin above tab on lower

PTO guard.

Upper LH

Guard

Lower LH

Guard

Right Hand

Guard

Front View

Secure Wire Above Tab PTO Guard

Engine/PTO Belt (Belt Guards Closed) (Engine Hidden for Clarity)

57

Maintenance Instructions

REPLACING/REPAIRING

Ground Drive Belt

1. To remove the ground drive belt: a. Depress the spring-loaded idler to relax belt.

LH Transaxle

Ground Drive

Belt b. Slide belt off pulleys, then release the idler.

RH Transaxle

Drive Pulley Idler Pulley

Depress Idler Pulley to

Relax Belt

Ground Drive Belt Assembly (Disengaged)

2. Reverse the procedure to install the ground drive belt.

LH Transaxle

Ground Drive

Belt

RH Transaxle

Drive Pulley

Ground Drive Belt Assembly (Engaged)

Idler Pulley

58

Maintenance Instructions

Fuel Filter

DANGER

Gasoline is extremely flammable and can be highly explosive. To minimize danger:

● Before servicing the fuel system:

1) Disconnect the spark plug leads.

2) Disconnect the negative (-) battery cable from battery.

● Use only an approved fuel container for gasoline.

● DO NOT allow open flames or sparks near the machine while performing maintenance or refueling; DO NOT smoke while working with fuel.

● Wipe up spilled gasoline immediately and completely.

Model B18 is equipped with an in-line fuel filter between the fuel tank and the fuel pump. Replacement of this filter is recommended every 400 hours of operation or when contamination is suspected or found in the fuel.

In-Line

Fuel Filter

REPLACING/REPAIRING

3. Verify that the fuel lines and clamps are securely attached, and that no fuel leaks are present.

Blade Overload Shear Bolts

NOTE: Blade shear bolts are not used on belt driven decks.

On gear driven decks, each cutting blade is keyed to the blade hub by two (2) shear bolts (10-24 x 5/8 in. stainless steel machine screws). These bolts are designed to shear and protect the blade drive gearbox from damage if the blade encounters a shock load.

Cutting Blade

Shear Bolts

Fuel Filter Location

IMPORTANT: Replace the fuel filter only in a clean area where the fuel line and connections will not be contaminated by any dust and dirt.

1. Expand and slide clamps on either side of the filter away from filter and pull fuel lines off filter.

2. Replace filter, making sure that the arrow on the filter is aligned with the fuel flow through the filter.

Cutting Blade Shear Bolts

NOTE: Tightening the 5/8-18 blade mounting nut to 60 lb·ft (81 N·m) is also important for proper shock load protection. It is important to not overtighten the mounting nut since this defeats (overrides) the function of the shear bolts.

If these bolts shear, remove the blade and install new bolts. Refer to CHECKING/SERVICING in this section for Sharpen Mower Blades which describes the blade removal and installation procedure.

After reinstalling the blade, check blade timing (on gear driven decks) by moving blades through one

(1) complete revolution.

Make sure blade tips pass clear of each other. If timing is incorrect, contact your Walker dealer.

59

Maintenance Instructions

Mower Blades

Mower blades are removed and remounted as described in Sharpen Mower Blades instructions (refer to CHECKING/SERVICING in this section). During the course of sharpening and inspecting mower blades, if there are any of the following conditions of wear or damage, blades should be replaced for reasons of safety and performance of the machine:

● An excessive amount of the flat section of the blade has been ground away (removed) when the blade is sharpened. Replace the blade when less than a 3/4 in. (19 mm) flat section remains at the blade tip.

● Examine ends of the blade carefully, especially the intersection where the flat section of the blade turns up to form the “wing tip” (refer to CHECKING/

SERVICING for Mower Blade Profile for Sharpening illustration in Sharpen Mower Blades instructions). Since sand and abrasive material can wear metal away in this area, the blade should be replaced when metal thickness has worn to

1/16 in. (1.6 mm) or less.

DANGER

When blades are operated over sandy soil, and if blades are allowed to wear, a

“slot” may be worn into the wing tip of blade. Eventually a piece of the blade may break off creating a serious potential for injury or damage.

● Check the blades for straightness by marking blade tip position inside the deck housing and then rotating the opposite end of the blade to the same position and comparing. If the difference in blade tip track is more than 1/8 in. (3 mm), the blade is bent and should be replaced.

● Inspect the blade surface, especially in formed areas, for cracks.

Replace the blade if any cracks are found.

REPLACING/REPAIRING

WARNING

DO NOT try to straighten a blade that is bent. NEVER weld a broken or cracked blade. ALWAYS replace with a new blade to assure safety.

Reinstall the blades following procedure from

Sharpen Mower Blades instructions in CHECK-

ING/SERVICING in this section. If blades are replaced, always use Walker original equipment blades to ensure safety and optimum performance.

The quality and performance of replacement blades offered by other manufacturers cannot be guaranteed, they could be dangerous.

CAUTION

ALWAYS use genuine factory replacement parts. Substitute parts CAN result in product malfunction and possible injury to the operator.

60

Maintenance Instructions

ADJUSTMENTS

Transmission Control

IMPORTANT: The proper adjustment of the transmission control stops is essential for efficient operation and life of the transaxle. These stops are properly adjusted at the factory and should only require read justment if the transaxle or related control linkage is removed or changed.

NOTE: It would not be unusual for a new machine, after the initial 5 or 10 hours of operation, to begin to not travel straight (this is due to the break-in of the transmissions). To fine tune tracking, refer to Step 5 -

Straight Tracking Adjustment in this section.

Step 1 - Steering Lever Position Adjustment

NOTE: For proper operation, the steering levers should be adjusted to sit evenly using the following procedure.

1. Examine the steering levers to make sure they are parallel front to back in relation to one another. If they are not equal, adjust accordingly.

(The handles may or may not be even at this point.)

NOTE: The LH steering lever is non-adjustable. This procedure will require adjustment of the RH lever to make it even with the LH lever.

Levers should sit parallel to each other

Stop Bolt Location

ADJUSTMENTS

2. Adjust the position of the RH lever by turning the stop bolt in the Speed Control Actuator in or out.

Turning the stop bolt in will make the RH lever move back, and turning it out will make it move forward. Tighten the locknut.

Stop

Bolt

Lever Alignment

61

Maintenance Instructions

Step 2 - Steering Handles Adjustment

1. An adjustment range of approximately 3 in.

(76 mm) is available on the steering handles - the han dles can be adjusted forward or aft depending on the arm length of the operator. The handles can be adjusted by loosening the locknut at the pivot point and the locknut holding the handle in position in the adjustment slide. Adjust the han dles into the most comfortable position and tighten both locknuts.

ADJUSTMENTS

Step 3 - Neutral Function Adjustment

1. With the Forward Speed Control (FSC) in NEU-

TRAL-PARK, the lever should be straight up.

Adjust by loosening the jam nuts on the FSC

Rod and turn the rod to attain the straight up position. Tighten the jam nuts.

Adjustment

Slide

Locknut

(Position)

Correct FSC Lever NEUTRAL-PARK Position

Locknut

(Pivot Point)

Steering Handles Adjustment

Adjust Length of

Rod to Position

FSC Lever

FSC Lever Position Adjustment

62

Maintenance Instructions

2. Securely block the tractor up so the drive tires are off the ground.

3. Adjust the tracking adjustment nuts at the front of both control rods so that 2 or 3 threads are visible, then loosen the jam nuts on the ball joints at the back of the control rods.

Control Arm

Control Rods

Tracking Adjustment Nuts

Transmission Control Rod and Arm Location

(Shown with Parts Removed for Clarity)

Ball Joint

Jam Nut

Control Rod

Maximum Speed

Adjustment Set Screw

FWD

REV

Locating/Limit

Stud

Transmission

Control Arm

ADJUSTMENTS

WARNING

The following adjustments are made with the engine running. Keep all body parts and tools away from rotating and hot components, and secure all loose clothing.

4. With the body lowered and the FSC in NEU-

TRAL-PARK, start the engine. With the engine at normal operating speed, check for movement of the drive wheels.

5. Using a wrench on one tracking adjustment nut, rotate the control rod counterclockwise just until the wheel on that side begins to move forward.

Then, counting the turns required, rotate the control rod clockwise just until the wheel stops and then begins to move in reverse.

Rotate the control rod back counterclockwise half the number of turns required to make the wheel go from moving forward to reverse. The transmission is now centered in the neutral window. Tighten the jam nut on the ball joint and repeat the same procedure on the other transmission.

6. Turn off the engine, and then lower the drive tires onto the ground.

NOTE: It may be necessary to tighten the FSC friction adjustment if the transmissions are moved out of neutral when the body is raised.

Refer to Step 7 Forward Speed Control Friction

Adjustment later in this section for location of the

FSC friction adjustment nut.

Tracking Adjustment Nut

(Adjusts Length of Control Rod)

Tracking Adjustment Components

63

Maintenance Instructions

Step 4 - Full Forward Speed Adjustment

1. Move the FSC to the full FORWARD speed position.

2. Raise the body. The maximum speed tracking adjustment set screw in both transmission control arms should not be contacting the limit stud on the transaxle. If they are, back the set screws out until they do not touch.

T-Handle

Hex Wrench

Maximum

Speed Tracking

Adjustment

64

Transmission

Control Arm

Maximum Speed Tracking Adjustment

(Shown with Parts Removed for Clarity)

Step 5 - Straight Tracking Adjustment

1. Sit in the seat, start the engine, set throttle at full speed, and with the FSC in the NEUTRAL-

PARK po sition check for movement of either drive wheel (if either wheel moves backward or forward, re fer to Step 3 Neutral Position

Adjustment and readjust).

2. Check for straight ground tracking on a level surface (with hands off the steering levers). Set the FSC at several different speeds and ob serve if the machine moves in a straight line (use cement joint or other line on ground for reference).

3. If tracking is not straight, shorten the control rod on the faster side by turning the tracking adjustment nut clockwise. If straight tracking and neutral are both achieved proceed to the next step. If straight tracking and neutral cannot both be achieved, turn the tracking adjustment nut on the faster side counterclockwise until neutral is restored.

4 Lengthen the control rod on the slower side by turning the tracking adjustment nut counterclockwise until straight tracking and neutral are both achieved.

ADJUSTMENTS

IMPORTANT: After tracking adjustments are complete, confirm that there is at least one (1) thread visible on both control rods past the tracking adjustment nuts.

5. If the machine is tracking straight throughout the speed range except at maximum speed, use the following adjustment procedure: a. With the engine off, place the FSC in full

FORWARD.

On the faster transmission, loosen the jam nut and turn the maximum speed tracking adjustment set screw in until it just contacts the limit stud, and then turn it in an additional 1/8 turn (turning the set screw in slows the drive wheel).

b. Recheck maximum speed tracking, and if necessary continue adjusting the set screw in small increments until straight travel is achieved.

c. Tighten the jam nut.

Step 6 - FSC Neutral Switch Adjustment

1. Place the FSC lever in the NEUTRAL-PARK position. Raise the body and adjust the switch adjustment bolt up until it just makes contact with the FSC switch plunger, and then turn the switch adjustment bolt up an additional two (2) turns and tighten the jam nut.

NOTE: It may be necessary to tighten the FSC friction adjustment if the transmissions are moved out of neutral when the body is raised.

Refer to Step 7 - Forward Speed Control Fric- tion Adjustment later in this section for location of the FSC friction adjustment nut.

FSC Switch

Switch Adjustment Bolt

FSC Neutral Switch Location

Maintenance Instructions

NOTE: Adjust the bolt downward for quicker activation (Switch Open).

Switch Closed in Neutral

Switch Adjustment

Bolt

Jam Nut

FSC Switch

Actuator Arm

FSC Friction Nut

ADJUSTMENTS

Step 7 - Forward Speed Control Friction Adjustment

Front of Mower

FSC Neutral Switch Adjustment

(Side View Through Chassis)

CAUTION

Before testing the FSC Neutral Switch, disconnect the spark plug wires from the engine and engage the parking brake to prevent accidental starting and inadvertent machine movement.

2. Check operation of the FSC Neutral Switch by placing the FSC lever in the full FORWARD position. While holding the ignition switch in the

START position, slowly move the FSC lever back towards the NEUTRAL-PARK position and stop when the starter motor engages. Note the position of the FSC lever where it passes through the slot in the body. The FSC lever should be within 1/8 in. (3 mm) of the NEU-

TRAL-PARK position. If this distance is greater than 1/8 in. (3 mm), turn the adjustment bolt down slightly and recheck switch operation.

When finished adjusting, tighten the jam nut and reconnect the spark plug wires.

FSC Friction Adjustment Test

1. Place the FSC lever in the full FORWARD position, and pull both steering levers fully back; the FSC lever should not move. If the FSC lever moves back the friction needs to be increased.

2. With the steering levers held back, move the

FSC lever back from the FORWARD position.

With a proper amount of friction adjusted, the

FSC le ver should move back with a slight amount of re sistance (friction). If the FSC lever movement is “stiff”, the friction needs to be decreased.

3. The FSC friction is increased or decreased by tightening or loosening the friction adjustment nut.

Loosen or tighten the nut and check the control function until the conditions of both steps 1 and 2 (above) are met.

FSC Friction

Adjustment Nut

FSC Friction Adjustment Nut

65

Maintenance Instructions

Blade Clutch (PTO)

Clutch Engagement/Belt Tension

The clutch engagement and PTO belt tension are adjusted using the clutch actuator link. After installing new PTO belts, after 10 hours and every 100 hours thereafter, check and adjust for the clutch spring assembly bolt head dimension as shown in the PTO

Clutch Engaged illustration. If the clutch actuator link or clutch spring assembly have been disassembled, first reset them to their factory preset lengths (as shown in the PTO Clutch Disengaged illustration) and then proceed with adjustment as follows.

Clutch Actuator

Link

ADJUSTMENTS

Adjust the length of the clutch actuator link to achieve a clutch spring assembly bolt head clearance of

1/4 in. to 5/16 in. (6.35 mm to 7.94 mm) with the clutch engaged. To adjust length: remove ball joint from clutch arm and shorten the clutch actuator link to increase this measurement, or lengthen the clutch actuator link to decrease this measurement. If adjustments are needed more frequently than every

100 hours to maintain dimensions, it may suggest problems with pulley wear or belt misalignment.

Ball Joint

Clutch Spring Assembly

(Spring Compressed)

Clutch Engagement

Arm

1/4 in. to 5/16 in.

(6.35 mm to 7.94 mm)

Safety

Switch

Blade Clutch

Engaged

Clutch Arm

Blade Clutch

Idler Pulley

Front of Mower

PTO Clutch Engaged

66

Maintenance Instructions

6-1/2 in.

*

(165.1 mm)

Knuckle Joint

2-1/8 in.

*

(53.98 mm)

Clutch Actuator

Link

6 in.

*

(152.4 mm)

Clutch Spring Assembly

(Spring Uncompressed)

*NOTE: Factory preset dimensions. Reset to these dimensions prior to adjustment if components have been disassembled.

PTO Clutch Disengaged

Clutch Disengagement/Brake Action

WARNING

It is important to check and maintain blade brake action for safe operation of the machine.

The declutched or disengaged position of the blade clutch idler pulley is adjustable and is set to give belt release without excessive slack and to apply the blade brake. The blade brake is activated by the brake band connected to the clutch engagement arm. The brake is designed to stop the blades within five (5) seconds after disengaging the clutch.

ADJUSTMENTS

Use the following procedures to check and adjust clutch disengagement and brake action:

Step 1 - Idler Pulley Maximum Travel Adjustment

Loosen the brake band adjustment nut allowing clutch pivot stop arm and stop bolt to make contact

(refer to Blade Brake Band Adjustment illustration).

1. To check the pulley travel, first engage the clutch, then measure the distance the pulley travels as the clutch is disengaged and the stop arm contacts the stop bolt.

2. Adjust the pivot stop bolt to give 1 in. to 1-1/8 in.

(25 mm to 29 mm) pulley travel from “clutch engaged” to “clutch disengaged”.

NOTE: This adjustment will prevent excessive pulley travel that can cause belts to develop too much slack, causing possible belt derailment upon disengagement.

1 in. to 1-1/8 in.

(25 mm to 29 mm)

CLUTCH DISENGAGED

CLUTCH ENGAGED

Idler Pulley

Clutch Pivot

Stop Bolt

Brake Engagement

Arm

Clutch Idler Pulley Travel

Clutch Pivot

Stop Arm

67

Maintenance Instructions

Step 2 - Blade Brake Band Adjustment

After the maximum pulley travel is set, adjust the working travel of the clutch idler pulley by adjusting the brake band nut and make the following adjustment as needed:

1. Adjust the blade brake band, using the adjustment nut until pulley travel is approximately

5/8 in. to 3/4 in. (16 mm to 19 mm) from engaged to disengaged.

NOTE: As blade brake band/drum wears, pulley travel will increase and it will be necessary to adjust the blade brake band nut to maintain these dimensions.

CLUTCH DISENGAGED

CLUTCH ENGAGED

5/8 in. to 3/4 in.

(16 mm to 19 mm)

ADJUSTMENTS

2. After adjustments are complete, check blade brake action as described in CHECKING/SER-

VICING the Blade Brake Action in this section.

If blades do not stop within five (5) seconds, check the following: a. Make sure clutch and brake linkage are working freely (no binding).

b. Check the brake band lining for wear.

c. Check the brake drum on the pulley. If excessive wear is present, it will be necessary to replace worn parts.

Tilt-Up Deck Adjustable Stop

When the carrier frame hinge joint is properly adjusted, the deck lock levers should move in and out of the engaged and disengaged positions freely.

All four (4) hitch pins used for height adjustment should sit flush on the washers above the deck pin bushing. On a level surface, if any pin is sticking up (likely the front pins), tighten the opposite side or loosen the same side to lower the pin. Adjustments are made by loosening the jam nut and tightening or loosen

Deck Mount Pivot Brack ets. Retighten the jam nut when the adjustment is complete.

Clutch Idler Pulley Travel Adjustment

Jam Nut

Blade Brake

Band

Set Screw

Tilt-Up Deck Adjustable Stop

68

Blade Brake

Band Adjustment Nut

Chassis Mount

(Ref)

Blade Brake Band Adjustment

MAINTENANCE AND SERVICE RECORD SHEET

DATE SERVICE ENGINE

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MAINTENANCE AND SERVICE RECORD SHEET

DATE SERVICE ENGINE

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70

LIMITED WARRANTY

FOR

WALKER MODEL B18

RIDER MOWERS

1. WHAT THIS WARRANTY COVERS, AND FOR HOW LONG:

Walker Manufacturing company will, at its option, repair or replace, without charge, any part covered by this warranty which is found to be defective in material and/or workmanship within one (1) year* after date of sale to the original retail purchaser unless the product is used for rental purposes, in which case this warranty is limited to ninety (90) days. At Walker’s request, customer will make the defective part available for inspection by Walker and/or return the defective part to Walker, transportation charges prepaid. All parts and components of the Walker Mower are covered by this warranty except the following components which are warranted separately by their respective manufacturers:

Briggs & Stratton Engine

Battery

The available warranties covering these items are furnished with each mower. Walker does not assume any warranty obligation, liability or modification for these items, which are covered exclusively by the stated warranty of the respective manufacturers noted above.

* Extended warranties are offered for the following powertrain components:

A two (2) year or 2000 hour (whichever comes first) warranty is offered for Hydro-Gear ZT3100 Hydrostatic transaxle; covers full cost of replacement up to 1000 hours of use, and after 1000 hours warranty coverage is prorated against

2000 hours.

2. WHAT THIS WARRANTY DOES NOT COVER:

A. This warranty does not cover defects caused by depreciation or damage caused by normal wear, accidents, improper maintenance, improper use or abuse of the product, alterations, or failure to follow the instructions contained in the

Operator’s Manual for operation and maintenance.

B. The customer shall pay any charges for making service calls and/or for transporting the mower to and from the place where the inspection and/or warranty work is performed.

3. HOW TO OBTAIN SERVICE UNDER THIS WARRANTY:

Warranty service can be arranged by contacting the dealer where you purchased the mower or by contacting Walker Manufacturing Company, 5925 East Harmony Road, Ft. Collins, CO 80528. Proof of the date of purchase may be required to verify warranty coverage.

4. WARRANTY LIMITATION:

A. THERE IS NO OTHER EXPRESS WARRANTY. ANY WARRANTY THAT MAY BE IMPLIED FROM THIS PURCHASE

INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IS HEREBY LIMITED TO THE

DURATION OF THIS WARRANTY AND TO THE EXTENT PERMITTED BY LAW ANY AND ALL IMPLIED

WARRANTIES ARE EXCLUDED. Some states do not allow limitations on how long an implied warranty lasts, so the above limitations may not apply to you.

B. WALKER WILL NOT BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES AND/OR

EXPENSES IN CONNECTION WITH THE PURCHASE OR USE OF THE MOWER.

Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation(s) or exclusion(s) may not apply to you.

C. Only the warranty expressed in this limited warranty shall apply and no dealer, distributor, or individual is authorized to amend, modify, or extend this warranty in any way. Accordingly, additional statements such as dealer advertising or presentations, whether oral or written, do not constitute warranties by Walker, and should not be relied upon.

D. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

71

WALKER MFG. CO.

• 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970) 221-5614

FORM NO. 110917 PRINTED IN USA www.walkermowers.com © 2017 WALKER MFG. CO

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