McGuire CentraAir Dock Leveler Owner's / User's Manual

CentraAir®
PATENT PENDING
Dock Leveler
Owner’s / User’s Manual
MCGUIRE • Division of Systems, Inc. • W194 N11481 McCormick Drive • Germantown, WI 53022
800.624-8473 • fax: 262.255-5917 • www.wbmcguire.com • [email protected]
Printed in U.S.A.
Copyright © 2015
Manual No. 4111-0038
May 2015
Table of Contents
Page
Safety
Recognize Safety Information .............................................................
General Operational Safety Precautions ............................................
Operational Safety Precautions...........................................................
Maintenance Safety Precautions .........................................................
Safety Decal’s........................................................................................
Owner’s User’s Responsibilities .........................................................
1
1
2
4
5
6
Introduction
General Information ..............................................................................
Dock Leveler Stock Specifications .....................................................
Component Identification .....................................................................
Theory ...................................................................................................
7
7
8
8
Installation
Prepare Pit ............................................................................................. 9
Prepare Dock Leveler .......................................................................... 10
Install Dock Leveler ............................................................................. 11
Install Control Panel and Wiring ........................................................ 16
Put New Leveler Into Service.............................................................. 17
Operation
Operating Instructions ........................................................................ 18
Ramp Loading/Unloading Instructions ........................................ 19
End Loading/Unloading Instructions ........................................... 20
Maintenance
Service Dock Leveler Safely ............................................................... 21
Periodic Maintenance .......................................................................... 22
Adjustments
Adjust Lip Latch and Lip Actuator Springs ...................................... 24
Adjust Lip Stop .................................................................................... 26
Troubleshooting
Troubleshooting ................................................................................... 28
Parts
Electrical ............................................................................................... 30
Control Box .......................................................................................... 31
Air Control Valves ................................................................................ 32
Below Dock Control ............................................................................. 33
Pit Extension Kit .................................................................................. 34
Bellows Regulator................................................................................ 39
Frame and Platform ............................................................................. 40
Lip Activation ....................................................................................... 42
Weather Seal, ...................................................................................... 43
Miscellaneous
Customer Information ......................................................................... 44
Customer Information ......................................................................... 45
Warranty................................................................................ Back Cover
SAFETY
Recognize Safety Information
General Operational Safety
Precautions
Safety-Alert Symbol
The Safety-Alert Symbol identifies NOTICE safety
messages on equipment, safety signs, in manuals,
or elsewhere. When you see this symbol, be alert
to the possibility of personal injury or death. Follow
the instructions in the safety message.
Read and understand the Owner’s/User’s manual and
become thoroughly familiar with the equipment and its
controls before operating the dock leveler
Never operate a dock leveler while a safety device or
guard is removed or disconnected.
The use of the word DANGER signifies the
presence of an extreme hazard or unsafe practice
which will most likely result in severe injury or
death.
The use of the word WARNING signifies the
presence of a serious hazard or unsafe practice
which may result in serious injury or death.
The use of the word CAUTION signifies possible
hazard or unsafe practice which could result in
personal injury.
NOTICE
The use of the word NOTICE is to draw attention
to a procedure that needs to be followed to prevent
machine damage.
Never remove DANGER, WARNING, or CAUTION
signs or Decal’s on the equipment unless replacing
them.
on
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Do not start the equipment until all unauthorized
personnel in the area have been warned and have
moved outside the operating zone.
Remove any tools or foreign objects from the operating
zone before starting.
Keep the operating zone free of obstacles that could
cause a person to trip or fall.
4111-0038 — May 2015
1
SAFETY
Operational Safety Precautions
Learn the safe way to operate this equipment. Read and understand the
manufacturer's instructions. If you have any questions, ask your supervisor.
Stay clear of dock leveling device when transport
vehicle is entering or leaving area.
Chock/restrain all transport vehicles. Never remove
the wheel chocks until loading or unloading is
finished and transport vehicles driver has been
given permission to drive away.
Do not move or use the dock leveling device if
anyone is under or in front of it.
Do not use a broken or damaged dock leveling
device. Make sure proper service and maintenance
procedures have been performed before using.
Keep hands and feet clear of pinch points. Avoid
putting any part of your body near moving parts.
Make sure lip overlaps onto transport vehicles bed
at least 4 in. (102 mm).
Keep a safe distance from both side edges.
2
4111-0038 —May 2015
SAFETY
Do not use dock leveling device if transports
vehicles bed is too high or too low.
Do not overload the dock leveling device.
Do not operate any equipment while under the
influence of alcohol or drugs.
Do not leave equipment or material unattended on
dock leveling device.
4111-0038 — May 2015
3
SAFETY
Maintenance Safety Precautions
ALWAYS disconnect electrical power source and
ground wire before welding on dock leveler.
DO NOT ground welding equipment to any hydraulic
or electrical components of the dock leveler. Always
ground to the dock leveler frame.
Hydraulic and electrical power must be OFF when
servicing the equipment. For maximum protection,
use an OSHA approved locking device to lock
out all power sources. Only the person servicing
the equipment should have the key to unlock the
device.
Failure to follow these instructions may result in
damage to dock leveler and/or serious personal
injury or death.
DO NOT grind or weld if hydraulic fluid or other
flammable liquid is present on the surface to be
ground or welded
DO NOT grind or weld if uncontained hydraulic fluid
or other flammable liquid is present. Stray sparks
can ignite spills or leaks near the work area. Always
clean up the oil leaks and spills before proceeding
with grinding or welding.
Always post safety warnings and barricade the
work area at dock level and ground level to prevent
unauthorized use of the unit before maintenance is
complete.
Always keep a fire extinguisher of the proper type
nearby when grinding or welding.
Failure to follow these instructions may result in
serious personal injury or death.
ALWAYS stand clear of dock leveler lip when
working in front of the dock leveler. Failure to do this
may result in serious personal injury or death.
A maintenance prop permanently attached and
hinged to the unit with means for lock out/tag out
requirements (per OSHA 1910.147) is included
with each pit style dock leveler. In addition, it is
recommended and good safety practice to use an
additional means to support the dock platform and
lip anytime when physically working in front of or
under the dock leveler. This additional means may
include, but not limited to a boom truck, fork truck,
stabilizing bar or equivalent.
4
4111-0038 —May 2015
SAFETY
Safety Decal’s
Every 90 days (quarterly) inspect all safety labels and tags to
ensure they are on the dock leveler and are easily legible. If any
are missing or require replacement, please call 1-800-643-5424
for replacements.
DANGER
CRUSH HAZARD
Maintenance prop must
support leveler behind bar.
Do not force maintenance
prop forward of bar to
support lip. Failure to
comply will result in death or
serious injury. Refer to
owner’s/user’s manual for
proper use.
1751-0727
1751-0727 Rev A
1751-0730 (x2)
DANGER
SAFETY INFORMATION
Unsupported dock leveler
ramps can lower unexpectedly.
Before allowing vehicle to leave
the dock always:
!
Ensure no equipment,
material or people are on
dock leveler.
!
Return dock leveler to its
stored position at dock level.
Failure to follow posted instructions will result in death or serious injury.
OPERATION
1. Read and follow all instructions and
warnings in owner’s/user’s manual.
2. Use of dock leveler restricted to
trained operators
3. Always chock trailer wheels or
engage truck restraint before
operating dock leveler or beginning to
load or unload.
4. Never use hands or equipment to
move ramp or lip
5. Before activating dock leveler:
¥ Ensure trailer is backed in against
bumpers.
¥ Remove any end loads if required.
¥ Check trailer alignment to avoid lip
interference. If lip does not lower to
trailer bed, reposition vehicle.
6. Ensure truck bed supports extended
lip or leveler frame supports the ramp
before driving on ramp.
7. Stay clear of hinges and front and
sides of moving dock leveler.
8. N e v e r u s e d a m a g e d o r
malfunctioning dock leveler. Report
problems immediately to supervisor.
MAINTENANCE/SERVICE
1. Read and follow all instructions,
warnings and maintenance
schedules in the owner’s/user’s
manual.
2. Maintenance/Service of dock leveler
restricted to trained personnel.
3. Place barriers on the driveway and
dock floor to indicate service work is
being performed.
4. DO NOT ENTER PIT unless dock
leveler is securely supported by
maintenance prop.
5. If electrically powered turn off and use
OSHA lockout/tagout procedures.
Call 262.255.1510 for replacement placards, warning labels, or owner’s/user’s manuals.
(decal placed in same position on both sides)
1751-0329 (x2)
DO NOT
FORK THIS SIDE
(decal placed in same position on both sides)
FORK
HERE
1751-0330 (x2)
(decal placed in same position on both sides)
1751-0729
DANGER
CRUSH HAZARD
Do not work under dock leveler unless this maintenance prop has been secured in the upright
position. Failure to comply will result in death or serious injury. See owner’s/user’s manual for proper
procedures.
1751-0729 Rev A
DANGER
CRUSH HAZARD
1751-0731
Rotate prop to maintenance
position. Open the pin latch
and insert through the
maintenance prop housing.
Close the pin latch to secure
prop. Use every time dock
leveler is serviced. Failure to
comply will result in death
or serious injury.
1751-0731
DANGER
1751-0726
CRUSH HAZARD
DO NOT ENTER PIT unless dock leveler is
safely supported by maintenance prop. Place
barriers on driveway and dock floor to indicate
service work being performed. Failure to comply
will result in death or serious injury. Refer to
owner’s/user’s manual for proper maintenance
procedures.
1751-0726 Rev A
4111-0038 — May 2015
5
OWNER’S/USER’S RESPONSIBILITIES
1. The owner/ user should recognize the inherent dangers of the interface between the loading dock and the
transportation vehicle. The owner/ user should, therefore, train and instruct all operators in the safe operation and use of the loading dock equipment in accordance with manufacturer’s recommendations and
industry standards. Effective operator training should also focus on the owner’s/user’s company policies
and operating conditions. Maintaining, updating and re training all operators on safe working habits and
operation of the equipment, regardless of previous experience, should be done on a regular basis and
should include an understanding and familiarity with all functions of the equipment. Owner’s/user’s shall
actively maintain, update and retrain all operators on safe working habits and operations of the equipment.
2. The manufacturer shall provide to the initial purchaser all necessary information regarding Safety Information, Operation, Installation and Safety Precautions, Recommended Initial and Periodic Inspections
Procedures, Planned Maintenance Schedule, Product Specifications, Troubleshooting Guide, Parts Break
Down, Warranty Information, and Manufacturers Contact Information, as well as tables to identify the
grade(slope) for all variations of length or configuration of the dock leveling device and information identifying the maximum uncontrolled drop encountered when sudden removal of support while in the working
range of the equipment.
3. It is recommended that when the transportation vehicle is positioned correctly in the dock opening and in
contact with both bumpers, there shall be a minimum of 4.00 inches (100mm) overlap of the leveling device
and the transportation vehicle at all times during the loading and unloading process.
4. The Owner/User must review all name plates, placards, decals, instructions and posted warnings and
place the same in view of the operator or maintenance personnel for whom such warnings are intended
for. Contact manufacturer for any replacements.
5. Manufacturer’s recommended periodic maintenance and inspection procedures in effect at the date of
shipment shall be followed at all times. Written documentation of maintenance, replacement parts or damage should be retained. In the event of damage notification to the manufacturer is required.
6. Loading dock equipment that has been structurally damaged or has experienced a sudden loss of main
support while under load (such as what might occur when a transport vehicle pulls out from under the
leveling device) shall be removed from service, inspected by a manufacturer’s authorized representative,
and repaired or replaced as needed before being placed back in service.
7. Any modifications or alterations of loading dock equipment shall only be done with prior written approval
from the manufacturer and the same shall be at least as safe as the original equipment was prior to the
modification and shall also satisfy all safety requirements of the manufacturer for the particular application
of the leveling device.
8. When industrial moving devices are being used in the loading or unloading of product from the transportation vehicle, this vehicle shall have the brakes and wheel chocks applied appropriately or all other positive
restraining device shall be fully utilized. It is recommended that transport vehicles with air-ride suspension systems shall have its air exhausted prior to performing loading and unloading operation to minimize
transport vehicle bed drop.
9. Loading dock safety equipment should never be used outside of its intended use, vertical working range,
or capacity. Please consult the manufacturer if you have any questions as to the use, vertical working
range or capacity of the equipment. Only properly trained and authorized personnel should operate the
equipment.
10. When selecting loading dock safety equipment, it is important to consider not only present requirements
but also future plans and any possible adverse conditions, environmental factors or usage.
6
4111-0038 —May 2015
INTRODUCTION
General Information
Dock Leveler Stock Specifications
CentraAir® Series dock levelers are available in the
following sizes, weight capacities, and options:
Width:
6 ft (1828.8 mm)
6-1/2 ft (1981.2 mm)
7 ft (2133.6 mm)
Length
6 ft (1828.8 mm)
8 ft (2438 mm)
10 ft (3048 mm)
Congratulations on your choice of a McGuire dock
leveler. This manual covers the CentrAir® dock
leveler.
Designed by McGuire to be a marvel of simplicity and
efficiency, your dock leveler, when properly installed,
will provide many years of trouble-free performance
with an absolute minimum of maintenance. Its
revolutionary air bellows system efficiently controls
and operates every function. To obtain maximum
performance and longest possible use, a simple
program of preventive maintenance is recommended.
Capacity (CIR*)
25,000 lb (11
30,000 lb (13
35,000 lb (15
40,000 lb (18
45,000 lb (20
50,000 lb (22
340
608
876
144
412
680
kg)
kg)
kg)
kg)
kg)
kg)
* CIR (Comparative Industry Rating)
All docks are available in 115V Controls, pneumatic
push button or lanyard.
The CentraAir® dock leveler comes equipped
with an electrical control panel, which allows push
button operation of the dock leveler functions. Each
CentraAir® leveler unit and control panel has been
factory pre wired and tested to ensure satisfactory
operation.
To illustrate which connections are to be made in the
field at installation, electrical drawings are included
with each order or by contacting Technical Services.
Once again, thank you and congratulations on your
purchase of a McGuire CentraAir® dock leveler.
4111-0038 — May 2015
7
INTRODUCTION
Component Identification
A
E
O
N
C
R
B
M
Q
D
G
P
L
K
J
F
I
A — Lip
B — Lip Assist Rod
C —Lip Linkage Assembly
D — Lip Latch Assembly
E — Lip Maintenance Prop Pivot
F — Lip Actuator Chain Spring
G — Lip Actuator Chain
H — Lip Actuator Chain Adjustment Link
(not shown)
I — Lip Keepers (2 used)
J — Air Bellows
K — Main Frame
L — Maintenance Prop
M —Toe Guard (2 used)
N —Raise Button
O —Safety Legs
P —Air Control Valve
Q —Lanyard
R —Filter/Regulator
THEORY
The MA dock leveler uses Compressed Air with a lanyard lip out and up.
or (single push button) operation for ease of use.
The lip assist spring (not shown) also helps keep the lip
The dock leveler can be operated three different ways. extended. When the lip is fully extended, the lip latch
1) Depress RAISE button (N) on the control panel. This cable engages the lip latch assembly, locking the lip in
activates an electric solenoid (P). The solenoid allows the extended position. The dock leveler has reached its
compressed air into the air bellows causing the platform full height when the lip is fully extended.
to rise. Releasing the RAISE button allows the platform
to lower.
To lower the platform, release the lanyard (Q) or RAISE
button (N).
2) RAISE button (N) on the control panel. Allows allows
compressed air into the air bellows causing the platform The platform will lower until the extended lip rests on the
to rise. Releasing the RAISE button allows the platform transport vehicle bed. If the lip did not fully extend or
to lower.
there is no transport vehicle at the dock the platform will
lower until one of the following conditions occur:
• Lip is resting in lip keepers (cross-traffic position).
• Leveler went to the below-dock position, lip folds
automatically, leveler rests on the safety legs
(below dock position).
The regulator(R) supplies 95 psi to the bellows. (J)
• Leveler went to the below dock position with operator
When the platform rises to with in 2-3 in. (51-76. mm)
holding the safety leg retract cable (not shown),
of its full raised height, the lip spring (F) and lip actuator
safety legs are retracted, lip folds automatically
chain (G), causes the lip linkage assembly to push the
causing dock to rest in the full below dock position.
3)Pull up and hold the Lanyard chain in the rear of the
unit until platform and lip are fully extended. Releasing
the chain allows the platform to lower.
8
4111-0038 —May 2015
INSTALLATION
Prepare Pit
A
10"
14"
C
B
7"
7"
E
E
D
A—Distance (Pit Width)
(Front and Rear)
B— Distance (Dock Floor-to-Pit
Floor) (All Four Corners)
C— Distance (Pit Length)
(Both Sides of Pit)
D— Distance (Pit Corner-to-Corner) (Top,
Bottom, and Both Sides)
Before lowering the dock leveler into the pit, the
following must be performed:
Post safety warnings and barricade the work area at
dock level and ground level to prevent unauthorized
use of the dock leveler before installation has been
completed.
Failure to follow the installation instructions can
result in damage to dock leveler, the facilities, and/
or serious personal injury or death.
1. Remove all debris from the pit and sweep the pit
clean.
2. Check the entire dock leveler pit for proper
construction according to approved/certified pit
drawings. Make sure pit is square by making the
following measurements:
•
Only trained installation professionals with the
proper equipment should install this product.
NOTICE
DO NOT remove the shipping bands around the
dock leveler lip until instructed to do so.
Measure pit width distance (A) at both front
and rear of pit.
• Measure dock floor-to-pit floor distance (B) at
all four corners.
• Measure pit length distance (C) at both sides.
• Measure corner-to-corner (criss cross) distance
(D) at both sides. Take measurements at dock
floor level and at pit floor level.
If any measurement is off by more than 1/8 in.
(3.18 mm), contact Technical Services before
proceeding.
When Required:
3. Make sure the field junction box for the dock leveler
(E) is at the correct location per pit diagrams.
4. Make sure the conduit for the air lines(E) are at
the correct location per the pit diagram
4111-0038 — May 2015
9
INSTALLATION
Prepare Dock Leveler
NOTICE
DO NOT remove the shipping bands (B) around
the platform lip and leveler frame at this time. The
shipping bands are needed to hold the leveler
together during the installation process.
A
1. Remove any control panel and bumpers that
may be banded to the frame of the dock leveler.
DO NOT remove the shipping bands (B) around
the platform lip and leveler frame at this time.
NOTICE
B
A— Lifting Bracket (2 used)
B — Shipping Bands
McGuire dock levelers are designed with installation
in mind. Each unit is shipped with lifting brackets (A)
fastened to the platform side joists.
The dock leveler is heavy. Use a lifting device and
chains with the appropriate lifting capacity and
reach.
Always use the lifting brackets provided with the unit
whenever lowering or lifting a dock leveler into or
out of a pit.
Failure to follow these instructions may result in
damage to dock leveler and/or serious personal
injury or death.
DO NOT over tighten the lifting bracket hardware.
Over tightening can damage the weather seal, if
equipped.
NOTE: Overall width of platform and lifting brackets
(A) must be kept to a minimum to prevent
interference between the lifting brackets and
the pit walls as the dock leveler is lowered
into the pit.
2. Make sure the mounting hardware of lifting brackets
(A) is snug. The brackets should pivot relatively
freely on the mounting cap screw. DO NOT over
tighten.
3. Attach lifting chains to lifting brackets (A) and to
a lifting device (i.e., hoist or fork truck) having the
appropriate lifting capacity and reach.
4. Remove wood blocks that maybe attached to the
leveler frame before putting the dock leveler into
the pit.
5. Raise the leveler to allow the leveler sit on the
maintenance prop.
Remove 3 plastic ties, 2 Rear, 1 Front before lowering into
pit
CFM Leveler #s Recommended Compressor Size
7.3
3-6
1.5 HP 20 GAL @ 90 PSI
17.5
6 & up
5 HP 60 GAL @100 PSI
Compressor pump MUST be filled with
appropriate oil prior to initial start up.
Refer to manufactures manual for proper
maintenance procedure.
1751-1037
10
4111-0038 —May 2015
INSTALLATION
Shim
Stacking Methods
Install Dock Leveler
M
N
O
P
R
E
C
D
S
A— Distance (Leveler Frame
Height)
B— Shim Locations (Under
Rear Vertical Supports)
C— Shim Location (Under
Lip Keepers)
D— Shim Locations (Under
Maintenance Prop)
E— Shim Locations (Under
Lip Spring)
F— Dock Floor
G— Rear Pit Curb Angle
H— String
I— Rear Hinge Frame Angle
J— Distance (Dock Floor-toPit Floor)
4111-0038 — May 2015
K— Dock Leveler Frame
M — Pyramid (Preferred)
N— Stepped (Acceptable)
O— Offset (Not Acceptable)
P — Straight (Not Acceptable)
R— Shim Location (Bellows
Mounting Plate, Both
sides)
S — Shim between lip keeper
curb angle when required.
F
J
G
H
I
A
K
B
11
INSTALLATION
NOTE: McGuire dock levelers are designed with a
nominal 1/2 in. (12.7 mm) shimming distance
to allow for pit inconsistencies.
4. For all CentraAir® models, put a 1/4 in. (6.6 mm)
thick shim at locations (C, D, B, R) .
1. Determine height of shim stack (L) for each shim
location (B) by performing the following:
NOTE: A 1/4 in. (6.6 mm) thick shim at locations (C
and D) is used only as a starting point. The
final shim stack height will be determined after
dock leveler is lowered into the pit.
a. Measure leveler frame height distance (A).
b. Measure dock floor-to-pit floor distance (J)
at each shim location (B). Write down the
dimensions obtained at each location.
c. Subtract distance (A) from distance (J) to obtain
the shim height. Repeat for each shim location.
NOTICE
The minimum size of the shim that contacts the
leveler frame (i.e., the top shim of each shim stack)
must be at least 4-1/2 x 4-1/2 in. (114.3 x 114.3 mm)
to support the full width of the hoist cylinder / storage
prop weldment.
Use the thickest shim stock possible for stability and
weld penetration purposes. DO NOT use multiple
layers of 1/8 in. (3.18 mm) or thinner shim stock.
2. Using the results obtained in step 1, create the
individual shim stacks on the pit floor at locations
(B). Build each shim stack (L) using the pyramid
method (N) (preferred) or stepped method (P) with
the top shim having a minimum size of 4-1/2 x 4-1/2
in. (114.3 x 114.3 mm) and each successive lower
shim being larger so the shims can be welded
together using a fillet weld. DO NOT use offset
method (Q) or straight method (R).
The dock leveler is heavy. Use chains and a
lifting device with the appropriate lifting capacity
and reach. Failure to do so may result in damage
to dock leveler and/or serious personal injury or
death.
5. Using an appropriate lifting device connected to the
lifting brackets, lower dock leveler into the pit so
rear hinge frame angle (H) is tight against rear pit
curb angle (F) across full width of the leveler frame.
6. Allow rear of dock leveler to rest on the rear shims
while keeping the front of the dock leveler level with
the dock floor.
7 For all MA models, add shims at front shim
locations (C and D) so front of dock leveler will stay
level with dock floor when leveler is resting fully on
shims.
NOTE: To assist in obtaining an accurate measurement
of distance (K), use a string (G) pulled tight
across the pit opening, directly over the shim
locations.
3. Verify that each shim stack is at the correct height
by measuring distance (K) [top of shim stack (L)
to dock floor]. Distance (K) must equal the dock
leveler height (A).
12
4111-0038 —May 2015
INSTALLATION
B
A
C
C
D
D
E
F
G
A— Front of Dock Pit
B— Dock Leveler Frame
3/8 in.
(9.5 mm)
6 in.
(152 mm)
C— Side Pit Curb Angle
D— Gap [3/4 in. (19 mm)
Minimum]
8 With rear hinge frame angle (F) tight against rear
pit curb angle (G), perform/check the following:
• Pry between the platform and rear hinge frame
angle at locations (E) to make sure rear edge of
platform is parallel to the rear hinge frame angle
(F).
• Gap (D) must exist equally along both sides of
leveler so weather seal (if equipped) will not
bind during dock leveler operation.
4111-0038 — May 2015
H
E— Pry Locations
F— Rear Hinge Frame
Angle
G— Rear Pit Curb Angle
H— Flare Bevel Weld, Typical
(To Fit Spacing)
9. If gap (D) cannot be obtained equally at both sides
of leveler, grind or add material at the rear edge of
rear hinge frame angle (F) as needed.
10. Allow the dock leveler to rest fully on the shim
stacks. Check that a smooth and level transition
exists between the dock floor and the dock leveler
platform. Add or remove shims as necessary until
a smooth transition is obtained.
11. If leveler cannot be squared and/or made level
as instructed in steps 8 — 10, contact Technical
Services.
13
INSTALLATION
12. With the leveler square in the pit and flush with
the surrounding dock, remove the banding on the
lip of the leveler.
13. Lift Leveler with appropriate machinery.
Two people are required to engage the maintenance
prop: one person to operate the lifting device, the
other person to engage the maintenance prop.
14. Slowly raise the platform. Check for binding as
platform is being raised.
15. If binding occurs, lower the platform. Reposition
leveler and/or add or remove shims as necessary.
Slowly raise platform again. If platform still binds,
contact Technical Services for further instructions.
16. All CentraAir® models - Once leveler is flush,
square and does not bind:
a. Install shims under maintenance prop (C)
where prop attaches to leveler frame. Make
sure prop is solidly shimmed.
b. Using appropriate machinery, raise the dock
to the fully open position.
c. Raise maintenance prop to the service
(upright) position and lock prop in this position
using an OSHA approved locking device.
DO NOT use the maintenance prop to support the
raised platform until the maintenance prop has been
properly shimmed and welded. The shims must be
welded to each other, the leveler frame, and to the
front pit curb steel. Failure to do this may result in
serious personal injury or death.
NOTICE
DO NOT weld before disconnecting all electrical
components.
DO NOT weld before removing air bellows.
Failure to follow these instructions may result
damage to these components from stray sparks and
weld splatter.
17. Remove air bellows from the leveler by unbolting
the bellows from the frame and the deck or wrap
bellows with fire proof blanket to protect from weld
sparks and splatter.
14
4111-0038 —May 2015
INSTALLATION
NOTICE
DO NOT grind or weld if hydraulic fluid or other
flammable liquid is present on the surface to be
ground or welded.
DO NOT grind or weld if uncontained hydraulic fluid
or other flammable liquid is present. Stray sparks
can ignite spills or leaks near the work area. Always
clean up the oil leaks and spills before proceeding
with grinding or welding.
Always keep a fire extinguisher of the proper type
nearby when grinding or welding.
Failure to follow these instructions may result in
serious personal injury or death.
NOTICE
DO NOT connect the dock leveler electrical wiring
and ground connections until all welding has been
completed.
DO NOT ground welding equipment to any hydraulic
or electrical components of the dock leveler. Always
ground welding equipment to the dock leveler frame,
NEVER to the platform.
Failure to follow these instructions may damage the
motor, wiring, and/or control panel.
Shim
Stacking Methods
DO NOT weld continuously along the full length of
the rear hinge frame angle. This can put unnecessary
stress on the leveler components, causing the
leveler to malfunction and shorten the life span of
the affected components.
NOTE: The illustration on page 13 shows a typical
weld pattern. The weld pattern will vary slightly
depending on size of dock leveler.
18. With the rear hinge frame angle (F) tight
against the rear pit curb angle and flush
with the curb angle (G), weld the rear hinge
frame angle (F) to the rear pit curb angle (G)
using a 3/8 in. (9.5 mm) flare bevel skip weld
— each weld being 6 in. (152 mm) long.
Start at each end with a 6 in. (152 mm) long
weld. Space all the other welds out evenly
leaving approximately 6 in. (152 mm) space
between each weld.
19. All model levelers: Install shims at locations (B,
p.11) using the pyramid or stepped shimming
method. Make sure the platform is level from sideto-side as well as from front-to-back and flush with
dock floor.
20. Weld front of dock leveler frame (B) to shims
located under the keepers, then weld the shims to
the front pit curb steel.
21. Finish weld all shims using a fillet weld.
N
• Weld all shims within each shim stack to each
other, then weld the shim stack to the leveler
frame.
P
• Weld the front leveler frame shim stacks to the
front pit curb steel.
Q
22. When all welding has been completed, paint all
the welds and shims.
R
Make sure the platform is properly supported in the
raised position before entering the pit to finish weld
the shims. Failure to do this may result in serious
personal injury or death.
* For left/right orientation of dock leveler, see inside back cover of
this manual.
4111-0038 — May 2015
15
INSTALLATION
Install Control Panel and Wiring or Air Lines
A
The electrical power must be OFF prior to electrical
installation. For maximum protection, use an OSHA
approved locking device to lock out all power
sources. Only the person installing the equipment
should have the key to unlock the power source.
D
B
C
Failure to follow these instructions may result in
serious personal injury or death.
DO NOT make any final electrical connections until
all welding has been completed. Failure to do this
may result in serious personal injury or death.
All electrical work — including the installation of
the disconnect panel, control panel, and final
connections to the pit junction box — must be
performed by a certified electrician and conform to
all local and applicable national codes.
Pneumatic Controls
A— Disconnect Panel (Provided by others)
B— Control Panel
C— Distance, 48 in. (14 630 mm)
D— Placard
Electric Controls
1. Mount the push button control panel (B) so bottom
of control panel-to-dock floor distance (C) is 48 in.
(1219.2 mm).
1. Mount the push button control panel (B) so bottom
of control panel-to-dock floor distance (C) is 48 in.
(1219.2 mm).
2. Install pneumatic air lines to control panel.
2. Install electrical disconnect panel (A) if not already
installed.
3. Re-install the air bellows, and connect pneumatic
air line.
4. After all pneumatic connections in the pit have
been made, raise the leveler, disengage the
maintenance prop and allow the platform to lower.
5. Install the Placard(s) (D), in close proximity to the
control box and in plain sight.
3. Install and connect the control wiring.
4. Re-install the air bellows, and connect air line.
5. Connect the dock leveler power cable to coil.
Refer to the electrical drawings supplied with the
dock leveler.
6. After all electrical connections in the pit have
been made, raise the leveler, disengage the
maintenance prop and allow the platform to lower.
7. Install the Placard(s) (D), in close proximity to the
control box and in plain sight.
16
4111-0038 —May 2015
INSTALLATION
Put New Dock Leveler Into Service
1. Disconnect the external lifting device and chains
from the lifting brackets.
2. Check that the leveler is flush with the dock floor
and that the platform lip contacts both lip keepers
evenly.
If an excessive transition exists between the dock
floor and leveler and/or lip does not contact both
lip keepers evenly, contact Technical Services for
further instructions.
7. When the platform lowers to the full below-dock
position, the lip will fold. Pull lanyard ring (or
depress and hold the RAISE button) until the
platform rises just enough to clear the lip keepers,
then release the lanyard ring (or RAISE button)
to allow the platform to lower to the cross-traffic
(stored) position (lip engages lip keepers).
8. Perform steps 5 – 7 at least four times make sure
the leveler functions properly and there is no
binding.
3. Install the dock bumpers as required.
4. Turn the main electrical power ON.
Always stand clear of platform lip when working in
front of the dock leveler. Serious personal injury or
death may result.
5. Pull lanyard cable and hold until leveler platform
is fully raised.
OR
Raise the leveler platform fully by depressing and
holding the RAISE button.
6. Release lanyard cable as is no transport vehicle
present at the dock, the platform will lower to the
full below-dock position as the lip folds.
OR
Release the RAISE button to lower the platform. As
long as there is no transport vehicle present at the
dock, the platform will lower to the full below-dock
position as the lip folds.
NOTE: If a transport vehicle is present, the platform
will lower until the lip rests on the transport
vehicle bed. (See Operating Instructions in
Operation section.)
4111-0038 — May 2015
Two people are required to engage the maintenance
prop: one person to operate the lifting device, the
other person to engage the maintenance prop.
9. Raise the platform fully. Hold the platform at this
position by pulling the lanyard ring (or RAISE
button) and move the maintenance prop to the
service (upright) position. Release the lanyard ring
(or RAISE button) to allow the platform to lower
until it is resting on the maintenance prop.
10. With the maintenance prop supporting the
platform, remove the lifting brackets
11. With toe-guards, support the toe guards, remove
the cotter pin used in shipping and carefully
release the toe guards.
12. Pull lanyard ring (or depress and hold the RAISE
button) until the maintenance prop drops to its
stored position. Release the lanyard ring (or
RAISE button) and allow the platform to lower
fully. Check operation of toe-guards.
13. When the platform lowers to the full below-dock
position, the lip will fold. Pull lanyard ring (or
depress and hold the RAISE button) until the
platform rises just enough to clear the lip keepers,
then release the lanyard ring (or RAISE button)
to allow the platform to lower to the cross-traffic
(stored) position (lip engages lip keepers).
17
INSTALLATION
Overhead Air Supply Above Door Pneumatic Supply Kit #6106-0016
See Page 21
Supply From Regulator 1/2 or larger Verify Systems
Valve
1/2 NPT to 3/8 tube
Provide by Systems
Pilot Supply
Control Box to
To Air Bellows
1/2 line Provided by Others
3/8 line Installed at Factory
3/8 line Provide By Systems
18
4111-0038 —May 2015
INSTALLATION
Underground Air Supply New Construction Kit# 6101-0018
See Page 21
Pilot Supply
Control Box to
To Air Bellows
Valve
End run ,Tee NOT
Required.
Supply From Regulator
1/2 line Provided by Systems
3/8 line Installed at Factory
3/8 line Provide By Systems
4111-0038 — May 2015
19
INSTALLATION
Lanyard Air Supply
See Page 21
To Air Regulator
To Air Bellows
Electric/ Pneumatic Controls
See Page 21
To Control Panel Air Regulator
To Air Bellows
To Air Regulator
3/8 line Installed at Factory
3/8 line Provide By Systems
20
4111-0038 —May 2015
4111-0038 — May 2015
T
KI
6106-0013
6106-0014
6106-0015
6106-0016
6106-0017
6106-0018
60'
30'
30'
60'
60'
R
pneumatic push button
operation
electric pushbutton
operation
lever operated valve
Underground air supply
New construction
6106-0018
6106-0017
6106-0017
Kit #
10
5
1
1
TBD
1
1
TBD
1
1
The amount of 1/2" tubing varies by job. It is based on the door
centerline and the distance to the compressor feed line fitting.
1
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6106-0015
BE
M
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pneumatic push button
operation
6106-0016
6106-0014
electric pushbutton
operation
electric pushbutton operation 6106-0013
pneumatic push button
operation
6106-0014
lever operated valve
6106-0013
lever operated valve
Kit #
Kit #
Overhead air supply
New construction
Overhead air supply
Retrofit
MISC PARTS REQUIRED FOR INSTALLATION OF CentraAir£ DOCK LEVELERS
INSTALLATION
21
OPERATION
Operating Instructions
Stay clear of dock leveler when transport vehicle is
entering or leaving dock area.
12 in. (305 mm)
DO NOT move or use the dock leveler if anyone is
under or in front of leveler.
12 in. (305 mm)
Keep hands and feet clear of pinch points. Avoid
putting any part of your body near moving parts.
Failure to follow these instructions may result in
severe personal injury or death.
Only trained personnel should operate the dock
leveler.
DO NOT use a broken or damaged dock leveler.
Make sure proper service and maintenance
procedures have been performed on leveler before
using.
Transport vehicle wheels must be chocked unless
the vehicle restraint is used. Never remove the
wheel chocks until loading/unloading is finished and
transport vehicle driver has been given permission
to leave.
Make sure platform lip rests on the transport vehicle
bed with at least 4 in. (102 mm) of overlap.
Maintain a safe distance from side edges of leveler
during the loading/unloading process.
Failure to follow these instructions may result in
22
The CentraAir®hydraulic dock leveler is designed to
compensate for a maximum ± 12 in.* (305 mm) of
height difference between the loading dock and the
transport vehicle bed. DO NOT use the dock leveler
if the transport vehicle bed is more than 12 in. (305
mm) higher or lower than the dock floor.
*service height may vary with design specifications
DO NOT overload the dock leveler.
DO NOT operate any equipment while under the
influence of alcohol or drugs.
DO NOT leave equipment or material unattended on
the dock leveler.
Failure to follow these instructions may result in
personal injury and/or damage to equipment.
The dock leveler operating instructions are divided
into the two methods of loading and unloading:
• For ramp loading and unloading, see Ramp
Loading/Unloading Instructions on page 19.
• For end loading and unloading, see End Loading/
Unloading Instructions on page 20.
4111-0038 —May 2015
OPERATION
Operating Instructions—Continued
Below Dock Loading/Unloading Instructions
Ramp Loading/Unloading Instructions
NOTE: If end unloading is required, see End
Loading/Unloading Instructions on page 20.
NOTE: If end unloading is required, see End
Loading/Unloading Instructions on page 20.
7. Check to make sure transport vehicle is positioned
squarely against dock bumpers.
For ramp loading or unloading, the MA dock
leveler can be operated by pulling the lanyard
chain (or RAISE button on the control panel
(A).
8. Instruct driver to remain at the dock until the
loading or unloading process has been completed.
9. Chock the transport vehicle wheels or use vehicle
restraint if present.
1. Check to make sure transport vehicle is positioned
squarely against dock bumpers.
10. Raise the platform by pulling lanyard ring (B) (or
depressing the RAISE button (A)) to fully raise the
leveler and extend the lip.
2. Instruct driver to remain at the dock until the loading
or unloading process has been completed.
11. Walk out on the leveler, Pull and Hold the release
ring (see picture below) until the platform lowers
onto the transport vehicle. Make sure there is
a minimum of 4” of lip overlapping the transport
vehicle.
3. Chock the transport vehicle wheels or use the
vehicle restraint if available.
A-RAISE Button
A
B
B-LANYARD Cable
4. Extend the platform lip onto transport vehicle as
follows:
Loading/Unloading Completed - Reset Leveler
a. Raise the platform by pulling lanyard ring (B) (or
depressing and holding RAISE button (A)).
A—RAISE Button
A
b. Pull lanyard ring (B) (or Hold the RAISE button)
until the lip is fully extended, then release the
lanyard ring (or RAISE button (A)). The platform
will lower until the lip is resting on the transport
vehicle bed.
c. Make sure that the lip is fully extended and
supported on the transport vehicle along the
entire width of the platform with at least 4 in. (102
mm) of lip contacting the transport vehicle bed.
B
B-LANYARD Cable
12. When loading or unloading is finished, raise the
platform by pulling lanyard ring (B) (or depressing
and holding RAISE button (A).
13. Pull lanyard ring (B) (or hold the RAISE button
(A)) until the lip folds enough to clear the transport
vehicle bed, then release the RAISE button. The
lip will fold and the platform will return to the crosstraffic position.
5. Proceed with loading or unloading the transport
vehicle.
6. If below dock loading is necessary, see steps 7-11.
If not, proceed to step 12.
4111-0038 — May 2015
14. Remove chocks from transport vehicle wheels or
release the vehicle restraint if used.
15. Indicate to driver that transport vehicle may leave
the dock.
23
OPERATION
Operating Instructions—Continued
End Loading/Unloading Instructions
NOTE: If ramp loading is required, see Ramp
Loading/Unloading Instructions on page 19.
End loading or unloading can be done with
the dock at the cross-traffic position or belowdock position, depending on the height of the
transport vehicle bed.
1. Check to make sure transport vehicle is positioned
squarely against dock bumpers.
2. Instruct driver to remain at the dock until the loading
or unloading process has been completed.
3. Chock the transport vehicle wheels or use the
vehicle restraint if available.
6. Pull lanyard ring (or depress the Raise button) to
position the platform high enough to clear the lip
keepers, but not high enough to extend the lip.
7. Walk out on the leveler, pull and hold the safety leg
retract pull ring (located in the recess at the front of
the platform). This will cause the lip to extend away
from the lip keepers and the cross traffic safety
legs to fold to allow the leveler to lower to the below
dock position.
8. When the platform lip clears the lip keepers,
continue to hold the pull chain as the leveler lowers
to the below-dock service position. The platform
will drift down to the full below-dock position.
9. Proceed with loading/unloading.
End Loading/Unloading — Platform at Cross-Traffic Position.
4. If transport vehicle bed is at or above dock floor
level, leave leveler at the cross-traffic position and
proceed with loading or unloading.
NOTE: When end unloading is finished and access to
the rest of the transport vehicle is still required,
the platform lip will need to be extended.
See Ramp Loading/Unloading Instructions on
page 19 for further instructions.
10. When the loading or unloading is finished, return
the dock leveler platform to the cross-traffic
(stored) position.
End Loading/Unloading — Platform Too High
Use Below-Dock Position.
5. If transport vehicle bed is below the dock floor
level, perform steps 6 –12.
11. Pull the lanyard ring (B) (or depress the RAISE
button (A)) until the lip clears the lip keepers.
Release lanyard ring (or RAISE button), leveler
will return to the stored or cross traffic position.
12. Remove chocks from transport vehicle wheels or
release the vehicle restraint if used.
13. Indicate to the driver that the transport vehicle
may leave the dock.
End Loading/Unloading — Platform at Below-Dock Position.
24
4111-0038 —May 2015
MAINTENANCE
Service Dock Leveler Safely
E
D
A
C
B
A— Maintenance Prop
B —Tag Out Device
C —Lock out Device
When service under the dock leveler is required,
always lock all electrical disconnects in the OFF
position after raising the platform and engaging the
maintenance prop. Failure to do this may result in
serious personal injury or death.
Always stand clear of the dock leveler lip when
working in front of the dock leveler.
The maintenance prop MUST be in the service
position when working under the dock leveler.
For maximum protection, use an OSHA approved
locking device to lock the maintenance prop in
the service position. Only the person servicing
the equipment should have the key to unlock the
maintenance prop.
Unless the dock leveler is equipped with a tethered
remote, two people are required to engage the
maintenance prop: one person to operate the unit,
the other person to engage the maintenance prop.
Failure to follow these instructions may result in
serious personal injury or death.
D— Lip Prop
E —Valve,Air Supply
Always post safety warnings and barricade the
work area at dock level and ground level to prevent
unauthorized use of the dock leveler before
maintenance is complete. Failure to do this may
result in serious personal injury or death.
Whenever performing maintenance under the
dock leveler platform, support the platform with the
maintenance prop (A). Position the maintenance prop
behind front header plate while staying clear of the lip.
The lip will fold down after the platform has rested on
the maintenance prop. The Lip Prop may be used to
keep the lip extended (D). Additional supports should
be used to prevent the lip from collapsing if working
under the leveler. Lock the maintenance prop in the
service (upright) position using an OSHA approved
lockout/tag out device* (B&C).
Whenever servicing the dock leveler, lock the electrical
power disconnect in the OFF position. Use only an
OSHA approved lockout/tag out device* (B).
Only the person servicing the equipment should have
the capability to remove the lockout/tag out devices.
The Tag out devices* must inform that repairs are in
process and clearly state who is responsible for the
lockout condition.
* Refer to OSHA regulation 1910.146.
* Refer to OSHA regulation 1910.147.
4111-0038 — May 2015
25
MAINTENANCE
Periodic Maintenance
A
B
C
E
D
G
A— Lip Hinge Area
B— Lip Maintenance Prop Pivot
Recommend 95 Psi
Inlet
C— Lip Link Pivots
D— Platform Pivots
E— Lip Assist Pin
G— Safety leg linkage pivots
Clockwise increase PSI
Adjusting knob Counter Clockwise decrease PSI
Lubricator: Gentle turn clock wise
untill it stops then turn back 1/2 turn
for factory setting.
Supply line to dock leveler
Fill line with Kill Frost
or equivalent (may not
be on every unit.)
Clean Filter as needed
Drain water as needed
26
4111-0038 —May 2015
MAINTENANCE
Regular maintenance must be performed on a weekly
and quarterly schedule. Follow all safety precautions.
Weekly Maintenance
(A)— Check Kill frost level. (may be required more
frequently depending on usage)
(B)— Drain water (may be required more frequently
depending on usage and compressor size).
(C)— Verify Line Pressure is at 95 psi.
• Operate the dock leveler through the complete
operating cycle to maintain lubrication.
NOTE: To thoroughly inspect the platform hinge area,
put the platform in the full below-dock position.
• Inspect the platform pivots and the lip hinge areas.
The hinge areas must be kept free of dirt and debris.
Build-up of foreign material in the hinge areas will
cause abnormal operation.
• Inspect the area under the platform, around and
under the air bellows. Build-up of foreign material
in this area may damage air bellows components,
causing abnormal operation.
NOTICE
Failure to properly lubricate the dock leveler will
cause abnormal operation of the leveler.
Quarterly Maintenance
• Perform Weekly Service Items
• Lubricate the following areas with light weight
machine oil:
(D)— Lip hinge area unless equipped with grease
fittings (apply oil to the top of the entire length
of lip hinge when platform is at the full belowdock position and lip is folded).
(E)— Platform hinge area (apply oil to top of all
platform hinges when platform is at the full
below-dock position).
(F)— Lip lifter and lift cylinder pin.
NOTE: Apply grease to lip hinge grease fittings if
equipped.
• Lubricate the following areas with light-weight
machine oil:
(G)— Lip maintenance prop pivot
(H)— Lip link pivots
(I)— Safety leg linkage pivots
• Lubricate the following areas with white lithium
grease (if equipped with grease fittings):
(J)— Lip hinge area (inject grease into all the lip
hinge grease fittings).
(K)— Platform hinge area (inject grease into all the
platform hinge grease fittings).
(L)— Lip assist pin.
• Regulator:
(M)— Check Kill frost level. (may be required more
frequently depending on usage)
A maintenance prop permanently attached and
hinged to the unit with means for lock out/tag out
requirements (per OSHA 1910.147) is included
with each pit style dock leveler. In addition, it is
recommended and good safety practice to use an
additional means to support the dock platform and
lip anytime when physically working in front of or
under the dock leveler. This additional means may
include, but not limited to a boom truck, fork truck,
stabilizing bar or equivalent.
4111-0038 — May 2015
(N)— Drain water (may be required more frequently
depending on usage and compressor size).
(O)— Verify Line Pressure is at 95 psi.
27
ADJUSTMENTS
Adjusting the Latch and Lip Actuator Spring Tension
When service under the dock leveler is required,
always lock all electrical disconnects in the OFF
position after raising the platform and engaging the
maintenance prop. Failure to do this may result in
serious personal injury or death.
Always post safety warnings and barricade the
work area at dock level and ground level to prevent
unauthorized use of the dock leveler before
maintenance is complete. Failure to do this may
result in serious personal injury or death.
A
B
Always stand clear of the dock leveler lip when
working in front of the dock leveler.
The maintenance prop and lip maintenance prop
MUST be in the service position when working
under the dock leveler. For maximum protection,
use an OSHA approved locking device to lock the
maintenance prop in the service position. Only the
person servicing the equipment should have the key
to unlock the maintenance prop.
Unless the dock leveler is equipped with a tethered
remote, two people are required to engage the
maintenance prop: one person to operate the unit,
the other person to engage the maintenance prop.
Failure to follow these instructions may result in
serious personal injury or death.
A— Lip Latch Spring
Adjustment
28
B— Lip Actuator Spring
Adjustment
4111-0038 —May 2015
ADJUSTMENTS
Adjusting Lip Latch Spring Tension
Adjusting Lip Actuator Spring Tension
This adjustment is set at the factory and should not
require additional adjustment.
This adjustment is set at the factory and should not
require additional adjustment.
Unlike mechanical levelers, the lip will not immediately
begin to fold as the platform returns to the stored
position.
Unlike mechanical levelers, the lip will not immediately
begin to fold as the platform returns to the stored
position.
After the platform is fully raised, and the lip extends,
the lip latch is designed to hold the lip in the extended
position until the platform drifts down to the below dock
position.
The leveler lip remains extended as the platform
drifts down to the below dock position. The lip will
automatically fold when the platform when the dock is
resting on the safety legs in the below dock position
If the lip does not remain extended check proper
engagement of the lip latch.
1. Check air bellows and hoses for possible leaks.
NOTE: Use two-turn increments when adjusting lip
assist spring. Check lip operation after each
adjustment. Repeat until proper operation is
obtained.
2. If the lip does not fully extend additional spring
tension may be needed.
Adjust spring tension as follows:
NOTE: Use two-turn increments when adjusting lip
assist spring. Check lip operation after each
adjustment. Repeat until proper operation is
obtained.
1. Loosen jam nut (A).
Adjust spring tension as follows:
2. To increase spring tension, turn nut (B) clockwise.
1. Loosen jam nut (A).
3.
2. To increase spring tension, turn nut (B) clockwise.
To decrease spring tension, turn nut (B)
counterclockwise.
3.
4. Tighten jam nut.
Recheck operation of platform and lip. Readjust lip
latch spring tension and lip assist spring tension until
proper operation is obtained.
4111-0038 — May 2015
To decrease spring tension, turn nut (B)
counterclockwise.
4. Tighten jam nut.
Recheck operation of platform and lip. Readjust lift
spring tension and lip assist spring tension until proper
operation is obtained.
29
ADJUSTMENTS
Adjust Lip Stop Bolt
Always post safety warnings and barricade the
work area at dock level and ground level to prevent
unauthorized use of the dock leveler before
maintenance is complete. Failure to do this may
result in serious personal injury or death.
A
B
Always stand clear of the dock leveler lip when
working in front of the dock leveler. Failure to do this
may result in serious personal injury or death.
C
E
The platform maintenance prop MUST be in the
service position when working under the dock
leveler. For maximum protection, use an OSHA
approved locking device to lock the maintenance
prop in the service position. Only the person
servicing the equipment should have the key to
unlock the maintenance prop.
Failure to follow these instructions may result in
serious personal injury or death.
Check that lip (E) is fully resting on the lip keepers
(D) and at the lowest part of the keeper cradle. If lip is
not resting properly in keepers, perform the following
adjustment.
D
A— Platform Frame
B— Jam Nut
C— Stop Bolt
D — Lip Keeper
E — Lip
4. Tighten jam nut.
5. Disengage lip maintenance prop.
6. Walk platform down to cross-traffic (stored) position.
1. Fully raise platform. Manually raise the lip and
engage lip maintenance prop.
7. Check lip position in both keepers. Repeat
procedure if necessary.
2. Loosen jam nut (B).
3. Adjust stop bolt (C) as necessary.
• Turn stop bolt “in” (clockwise) to allow lip to fold
closer to platform frame (A).
• Turn stop bolt “out” (counterclockwise) to hold
lip further away from platform frame (A).
30
4111-0038 —May 2015
NOTES
This page intentionally left blank
4111-0038 — May 2015
31
TROUBLESHOOTING
TROUBLESHOOTING
Troubleshooting
When service under the dock leveler is required,
always lock all electrical disconnects in the OFF
position after raising the platform and engaging the
maintenance prop. Failure to do this may result in
serious personal injury or death.
Always post safety warnings and barricade the
work area at dock level and ground level to prevent
unauthorized use of the dock leveler before
maintenance is complete. Failure to do this may
result in serious personal injury or death.
Always stand clear of the dock leveler lip when
working in front of the dock leveler.
The maintenance prop MUST be in the service
position when working under the dock leveler.
For maximum protection, use an OSHA approved
locking device to lock the maintenance prop in
the service position. Only the person servicing
the equipment should have the key to unlock the
maintenance prop.
Unless the dock leveler is equipped with a tethered
remote, two people are required to engage the
maintenance prop: one person to operate the unit,
the other person to engage the maintenance prop.
Failure to follow these instructions may result in
serious personal injury or death.
Before performing the detailed troubleshooting procedures, check the following items first:
• Check all fuses inside the control panel(s). Replace
any blown fuse(s) with a fuse of equal specification.
32
• Make sure the correct voltages are present at the
proper locations inside the control panel(s).
4111-0038 —May 2015
TROUBLESHOOTING
Symptom
Possible Cause
Low Air pressure
No voltage to solenoid
Solution
Minimum 80 Psi required at regulator, if lower check
air supply.
Check breakers if ok check voltage at control box and
solenoid
Platform does not rase
Lanyard Cable Adjustment Check Cable adjustment
Incorrect Air Line
Connections
Verify pilot and Main supply air line connections are
correct at control box.
Air bladder or connecting air Check air bladder and air line repair or replace as
lines punctured
needed
Damaged or restricted air
lines
Replace damaged air line or remove restriction
Platform rises slowly
Low Air pressure
Dock leveler binding
Check for visible obstructions that could cause
binding. Remove obstructions. If no obstructions
found, call Poweramp® Technical Services.
See Platform Rises Slowly
See Platform Rises Slowly
See Periodic Maintenance in the Maintenance
section.
Platform does not rise to
full height.
Low Air pressure
Platform DOES rise to
full height, but lip DOES
NOT extend or extend
fully.
Lip extends but does
not remain extended as
leveler drops.
4111-0038 — May 2015
Minimum 80 Psi required at regulator, if lower check
air supply.
Lip actuator spring needs
additional tension.
Lip latch spring needs
additional tension.
Minimum 80 Psi required at regulator, if lower check
air supply.
Inspect lip actuator chain, repair or replace as
needed.
See Adjustment Section: Lip Latch Spring.
• Increase tension as needed to keep latch
engaged.
• Clean any debris from lip latch area.
• Lubricate as instructed in maintenance section.
33
Electrical
Controls 9-V0-800-0-E
34
4111-0038 —May 2015
Control Box
4.00”
A
C
B
6.00”
4.00”
F
Main Supply
A
Pilot Supply
0.5 FLA Amp Draw
Item
Quantity
Part Number
A
1
9-V0-800-0-B
B
1
1751-0818
Decal (English)
C
1
1751-0736
Decal,Arc Flash
4111-0038 — May 2015
Description
Push Button Controller,
35
PARTS
H
D E
A
G
L
C
J
F
B
I
Item
Quantity
Part Number
A
B
C
D
E
F
G
H
I
J
K
L
1
1
1
2
2
A/R
1
1
1
1
A/R
1
5265-0001
8103-0001
5402-0009
2101-0008
2101-0143
R980-0001
8581-0158
9512-0261
9301-0236
9301-0237
8581-0152
0521-0178
Description
Cable Assembly (Includes Pull Ring)
Weight Assembly
Lanyard Arm
Bolt ¼” x 2” Lg
Lock Nut ¼”
⅜ Nylon Air Line
Valve Operator, Mechanical
Lanyard Control Bracket
Fitting, Straight
Fitting, Elbow
Clamp, Air Line (Not Shown)
Down Speed Control
I
D
A B
C
E
G
H
Item
Quantity
Part Number
A
B
C
D
E
F
G
H
I
2
2
1
1
1
A/R
1
1
1
2101-0008
2101-0143
4305-0580
8581-0157
0521-0178
8581-0152
9301-0236
9301-0237
8581-0159
36
Description
Bolt ¼” x 2” LG (not Shown)
Lock Nut ¼” (not Shown)
Harness
Valve Operator, Electrical ---REF--Valve, Down Speed
Clamp, Air line (not Shown)
Fitting, Straight
Fitting, Elbow
Coil, Solenoid valve
4111-0038 —May 2015
PARTS
D
A B
K
E
C
Item
Quantity
Part Number
Description
A
B
C
D
E
F
1
1
1
1
1
A/R
0521-0048
0521-0178
9301-0236
9301-0261
9301-0237
8581-0152
Brass Reducer 1/4 NPT to 3/8 NPT
Breather / Muffler
Fitting 3/8 NPT to 3/8 Tube
Fitting 1/8 NPT to 3/8 Straight
Fitting 3/8 NPT to 3/8 Swivel Elbow
Clamp, Air line (not Shown)
G
1
8583-0070
Valve Assemble
Below Dock Control
G H I
E F
A
B
Item
Quantity
A
B
E
F
1
1
1
1
DPLA-0343
DPLA-0353
DOTH-2074
DOTH-2160
Below Dock Control Assy.
Below Dock Pull Chain
Cap Screw, Lip Stop -11 UNC
Nut,Hex 5/8-11 UNC
G
H
1
1
DPLA-0360
DOTH-2060
Rod, Push
Bolt Shoulder
I
1
DOTH-2131
Lock Nut
4111-0038 — May 2015
Part Number
Description
37
Control Box
E
B
D
Main Supply
Pilot Supply
A
C
Item
Quantity
Part Number
Description
A
2
9301-0249
3/8 Bulkhead fitting
B
1
1751-0893
Decal (English)
C
1
8581-0163
Valve,Air 2 Position 3 Way (Includes Knob)
D
2
9301-0248
3/8 Male Elbow
E
1
2756-0002
Push Button Controller, (9-V0-800-0-E) McGuire DECAL
B
A
Item
Quantity
Part Number
A
1
B
1
9301-0241
9301-0244
9301-0260
38
Description
Elbow 3/8
Tee 3/8
Tee 1/2
4111-0038 —May 2015
PARTS
F E
C D
B
A
Item
Quantity
Part Number
Description
A
1
5811-0002
Air Bellows
B
1
9514-0160
Top Mounting Weldment
C
1
9512-2090
Pin, 49/64 X 10-¾ Lg.
D
2
2101-0045
Cotter Pin
E
8
2101-0273
3/8-16 UNC x 1” Lg.
F
8
2101-0258
G
1
0521-0035
Washer
Air Line Connection W/ 9301-0237 Ftg
B
A
E
F
95 PSI
Recommend for
best performance
D
C
Item
Quantity
Part Number
Description
A
1
8581-0154
Filler/Regulator
Oil lubricator
B
1
8581-0153
C
A/R
R980-0001
D
A/R
R981-0001
Kil Frost
E
2
9301-0236
Fitting Straight
F
1
9301- 0237
Fitting, Elbow
4111-0038 — May 2015
Nylon Air Line
39
PARTS
Frame and Platform
A
N
M
B
I
J
P
C
E F G
D
H
L
K
O
40
4111-0038 —May 2015
PARTS
Frame and Platform
1
2
Item
Quantity
A
B
1
1
C
2
D
Part Number
Description
1
See Table A
9515-____2
DPLA-2101
DPLA-2102
DPLA-2103
DKIT-9179
Lip, Welded Assembly
Platform, Welded Assembly
Pin, Lip Hinge 6’W
Pin, Lip Hinge 6.5’W
Pin, Lip Hinge 7’W
Toe Guard Assembly 6 Foot (Both Sides and Hardware)
E
F
G
H
2
4
2
1
DKIT-9180
DKIT-9181
2101-0039
2101-0163
2101-0011
8435-____1
Toe Guard Assembly 8 Foot (Both Sides and Hardware)
Toe Guard Assembly 10 Foot (Both Sides and Hardware)
Nylon Lock Nut, 5/16-18 UNC
Washer, 5/16 in., Flat
Cap Screw, 5/16-18 UNC x 1 in.
Frame,
I
J
P
2
2
2
K
1
L
M
N
1
1
2
O
2
DOTH-2373
DOTH-2355
2101-0079
9224-0030
9224-0031
9224-0079
9201-0009
1751-0010
2101-0046
8432-1129
8432-1130
8432-1131
PIn Cotter
Pin, Clevis
Washer, Flat
Maintenance Prop “39½
Maintenance Prop “43½
Maintenance Prop “47½
Prop Pin & Clip
Decal, Model / Serial ID
Cotter Pin, ¼ x 1¼ in.
Lip Keeper 16” Lip
Lip Keeper 18” Lip
Lip Keeper 20” Lip
Provide dock leveler serial number, platform size, and lip size when calling or faxing orders.
Provide length and width of inspection plate opening when calling or faxing orders.
* For left/right orientation of dock leveler, see inside back cover of this manual.
LIPS
A
6.0 FOOT
25K
30K
35K
40/45K
55K
1
16
0595-5300
0595-5309
0595-5318
0595-5327
0595-5336
1
18
0595-5301
0595-5310
0595-5319
0595-5328
0595-5337
20
0595-5302
0595-5311
0595-5320
0595-5329
0595-5338
1
6.5 FOOT
1
16
0595-5303
0595-5312
0595-5321
0595-5330
0595-5339
1
18
0595-5304
0595-5313
0595-5322
0595-5331
0595-5340
1
20
0595-5305
0595-5314
0595-5323
0595-5332
0595-5341
7.0 FOOT
1
16
0595-5306
0595-5315
0595-5324
0595-5333
0595-5342
1
18
0595-5307
0595-5316
0595-5325
0595-5334
0595-5343
1
20
0595-5308
0595-5317
0595-5326
0595-5335
0595-5344
4111-0038 — May 2015
41
PARTS
Lip Activation
Located on Deck
Located on Lip
R
J
S G M
P
Q
H I
E D
G F
T U
S
O
A
B
K L M G
C
Item
Quantity
A
B
1
1
C
1
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
1
1
2
2
1
1
1
1
1
5
1
1
1
1
1
1
2
2
42
Part Number
9513-0092
2101-0221
9511-0156
9514-0114
9513-0097
2101-0051
2101-0004
2101-0103
2101-0222
2101-0223
9514-0091
5775-0004
2101-0220
2101-0079
2101-0045
0941-0006
DPLA-2128
DOTH-2416
DOTH-2421
DPLA-0341
DOTH-2061
DOTH-2131
Description
Lip Assist Rod Complete 34” Lg (Includes Nuts)
Washer
Spring, Lip STD
Spring, Lip HD
Lip Latch Plate
Bolt,½ x 2½ Lg
Washer
Nut, ½ Lock Nut
Bolt, Shoulder x ½ x 1¾
Nut, Nylon lock ”
Prop, Lip Maintenance Kit (includes all hardware)
Lip Latch Assembly (Includes Spring and Cable)
Bolt, ½ x 1 Lg.
Washer, ½
Cotter Pin ⅛ 1.00 LG
Snubber Spring
Chain
Lap Link 3/16
Cold Shut 5/16
Linkage Bar
Bolt Shoulder
Nut, Lock Nut
4111-0038 —May 2015
PARTS
Weather Seal
E
D
Weather Seal Kits
Item
Quantity
Part Number
A
B
1
1
0195-0021
0195-0033
C
Description
Brush Kit Includes Seal and Track, 1-1/2 in. 82" Lg. (Both Sides)
Rubber Kit Includes Seal and Track, 1-1/2 in. 82" Lg. (Both Sides)
Individual Replacement Seals
Item
Quantity
Part Number
C
D
E
1
1
1
0195-0021
0195-0033
0192-0146
Description
Brush Refill, 1-1/2 in. 82" Lg.
Rubber Refill, 1-1/2 in. 82" Lg.
Replacement Channel
* Provide dock leveler serial number and size of platform when calling or faxing orders.
*Provide width of weather strip when replacing existing seals
4111-0038 — May 2015
43
PLACARD
! DANGER
•
•
•
O P E R AT I N G
INSTRUCTIONS
Read
and
follow
all
instructions, warnings, and
maintenance schedules in
the manual and on placards.
Operation and servicing of
dock leveler is restricted to
authorized personnel.
Always chock transport vehicle wheels or engage vehicle restraint
and set parking brakes before operating dock leveler or beginning
to load or unload.
Before activating dock leveler, ensure lip avoids contact with
transport vehicle sides and cargo. If lip does not lower to transport
vehicle bed, reposition transport vehicle.
(QVXUH WKH WUDQVSRUW YHKLFOH ÀRRU VXSSRUWV H[WHQGHG OLS RU WKH
leveler frame (lip keepers or below dock endload supports) supports
the ramp before driving on ramp.
Stay clear of hinges and front and sides of moving dock leveler.
Never use hands or equipment to move the ramp or lip.
Never use damaged or malfunctioning dock leveler. Report problems
immediately to supervisor.
Always store dock leveler and remove people, material, and
equipment from ramp before vehicle leaves the dock.
DO NOT ENTER PIT unless dock leveler is securely supported by
the maintenance prop.
Disconnect power and follow proper lockout/tagout procedures for
the dock leveler before entering the dock leveler pit or doing any
repair or inspection under the dock leveler.
•
•
•
•
•
•
•
•
FAILURE TO FOLLOW THESE INSTRUCTIONS COULD
RESULT IN DEATH OR OTHER SERIOUS INJURY.
Scan to view our owner’s/user’s
manuals online.
www.DockSystemsInc.com
1.800.643.5424
Call for additional placards, or manuals, or with questions
regarding proper use, maintenance, and repair of dock leveler.
Item
Quantity
Part Number
A
1
1751-0874
44
1751-0874 Rev A
POWERED DOCK LEVELERS
NORMAL OPERATION
1. Raise the platform by depressing and
holding the RAISE button.
2. Hold the RAISE button until the lip is fully
H[WHQGHGWKHQUHOHDVHWKH5$,6(EXWWRQ
The platform will lower until lip is resting on
the transport vehicle.
STORING LEVELER
1. Depress the RAISE button until the lip is
completely folded. When the lip is folded,
release the RAISE button. The platform will
ORZHUUHWXUQLQJWRWKHFURVVWUDI¿FSRVLWLRQ
BELOW DOCK ENDLOADING
•
(HYDRAULIC ONLY) Depress and hold
the RAISE button until the leveler is fully
UDLVHG$VWKHOLSVWDUWVWRH[WHQGUHOHDVH
the RAISE button. The leveler will lower
to the below dock position provided the
OLS H[WHQVLRQ DOORZV WKH OLS WR FOHDU WKH OLS
keepers.
• (AIR POWERED ONLY) Depress and hold
the RAISE button until the leveler is 12”
above dock level. Pull the below dock level
chain until the leveler passes the below
dock position.
• (HYDRAULIC WITH INFINITE LIP
CONTROL) If equipped, raise the platform
by depressing and holding the RAISE
button. When the lip is just above the lip
keepers, simultaneously depress and
hold the RAISE button and the LIP OUT
EXWWRQXQWLOOLSKDVH[WHQGHGEH\RQGWKHOLS
keepers. Release both buttons.
NOTE: If equipped, depressing E-STOP button will stop platform from lowering.
Description
Placard, CA
4111-0038 —May 2015
MISCELLANEOUS
Customer Information
A
NOTE: Refer to illustration for left/right orientation of
dock leveler.
Dock Leveler Information
The model/serial number decal (A) is located
on the right platform joist near the front (lip)
of dock leveler.
Model ___________________________________
When you receive your MA-Series dock leveler, write
down the dock leveler model and serial number in
the form provided. This will help ensure safe keeping
of the numbers in the event the model/serial number
decal (A) becomes lost or damaged.
McGuire, Job No. ______________________
Also, write down McGuire job number, the company
that installed the dock leveler, and the original
owner’s name. This will all help to identify the specific
dock leveler if more information is required.
Address _________________________________
Serial No. ________________________________
Original Owner Information
Name ___________________________________
________________________________
Installer Information
When ordering, use part numbers and description
to help identify the item ordered. Do not use “item”
numbers. These are only for locating the position of
the parts. Always give dock leveler MODEL NUMBER
and/or SERIAL NUMBER.
For service, call or contact:
Name ___________________________________
Address _________________________________
_________________________________
Date of Installation ________________________
Systems, Inc.
P.O. Box 309
Germantown, WI 53022
Phone: (800) 624-8473
Fax: (262) 255-5917
E-mail: [email protected]
4111-0038 — May 2015
45
STANDARD PRODUCT WARRANTY
SYSTEMS, INC. warrants that its products will be free from defects in design, materials and workmanship
for a period of one (1) year from the date of shipment. All claims for breach of this warranty must be
made within 30 days after the defect is or can with reasonable care, be detected. In no event shall any
claim be made more than 30 days after this warranty has expired. In order to be entitled to the benefits
of this warranty, the product must have been properly installed, maintained and operated in accordance
with all manufacturer’s recommendations and/or specified design parameters and not otherwise
have been subject to abuse, misuse, misapplication, acts of nature, overloading, unauthorized repair
or modification, application in a corrosive environment or lack of maintenance. Periodic lubrication,
adjustment and inspection in accordance with all manufacturers’ recommendations are the sole
responsibility of the Owner/User.
In the event of a defect, as determined by SYSTEMS INC., covered by this warranty, SYSTEMS INC.
shall remedy such defect by repairing or replacing any defective equipment or parts, bearing the cost
for the parts, labor and transportation. This shall be exclusive remedy for all claims whether based on
contract, negligence or strict liability.
WARRANTY LIMITATIONS
THE ABOVE WARRANTIES ARE IN LIEU OF ANY OTHER WARRANTIES, WHETHER EXPRESSED
OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. SYSTEMS INC. AND ITS SUBSIDIARIES SHALL
NOT IN ANY EVENT BE LIABLE TO ANYONE, INCLUDING THIRD PARTIES, FOR INCIDENTAL,
CONSEQUENTIAL OR SPECIAL DAMAGES OF ANY KIND INCLUDING BUT NOT LIMITED TO,
BREACH OF WARRANTY, LOSS OF USE, LOSS OF PROFIT, INTERRUPTION OF BUSINESS OR
LOSS OF GOODWILL.
PRODUCT SPECIFIC WARRANTY
“CENTRAAIR®” SERIES LEVELER
In addition to the “Standard Product Warranty” provided with all McGuire Products, Systems Inc.,
guarantees materials, components and workmanship to be free of defects for the following extended
periods:
• Structural Warranty – For a period of five (5) years from the date of shipment, product will
carry a prorated structural warranty. This warranty specifically applies to; the deck section,
lip section, frame, rear hinge assembly and front hinge assembly only. This warranty covers
structural repairs to or replacement of dock leveler in Systems Inc sole discretion and expense
including reasonable labor, materials, freight and travel. If Systems Inc determines replacement
is necessary, it will provide the original purchaser with a credit toward the purchase of the new
replacement Systems Inc. product in the amount equal to the original purchase price of the
warranted product F.O.B. point of manufacture, discounted on a ten year straight line basis by
the number of years of use prior to replacement.
• Pneumatic Warranty – For a period of four (4) years from the expiration of the Standard Product
Warranty, Systems will provide replacement component parts from defective lifting system. This
warranty specifically covers material and freight only and applies to; Bellows, hoses and valves.
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