McGuire MP Series User manual

MP-Series
Dock Leveler
Owner’s/User’s Manual
Printed in U.S.A.
Copyright ©2016
Manual No. 4111-0019
May 2015
July 2016
MCGUIRE • Division of Systems, Inc. • W194 N11481 McCormick Drive • Germantown, WI 53022
800.624.8473 • fax: [phone] • www.wbmcguire.com • [email protected]

Page
Safety
Recognize Safety Information ............................................................. 1
General Operational Safety Precautions ............................................ 1
Operational Safety Precautions........................................................... 2
Maintenance Safety Precautions......................................................... 4
Safety Decals......................................................................................... 5
Owner’s/User’s Responsibilities ........................................................ 6
Introduction
General Information.............................................................................. 7
Dock Leveler Stock Specifications ..................................................... 7
Component Identification..................................................................... 8
Installation
Prepare Pit ............................................................................................. 9
Prepare Dock Leveler .......................................................................... 10
Install Dock Leveler ............................................................................ 12
Operation
Theory .................................................................................................. 17
Operating Instructions ....................................................................... 18
Ramp Loading/Unloading Instructions ....................................... 19
End Loading/Unloading Instructions........................................... 20
Maintenance
Service Dock Leveler Safely .............................................................. 21
Periodic Maintenance ......................................................................... 22
Adjustments
Adjust Lift Arm Spring and Lip Assist Spring Tension .................. 24
Adjust Lip Stop Bolt ........................................................................... 26
Troubleshooting
Troubleshooting.................................................................................. 27
Parts
Hold-Down Mechanism ...................................................................... 29
Frame Components ............................................................................ 30
Platform Components ........................................................................ 32
Toe Guard/Weather Seal—Optional .................................................. 36
Miscellaneous
Customer Information ........................................................................ 37
Warranty................................................................................ Back Cover
Table of Contents

1
Manual No. 4111-0019
May 2015
July 2016
SAFETY
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.
Recognize Safety Information
The use of the word DANGER signifies the presence
of an extreme hazard or unsafe practice which will
result in death or serious injury.
Safety-Alert Symbol
The Safety- Alert Symbol is a graphic representation
intended to convey a safety message without the
use of words. When you see this symbol, be alert to
the possibility of death or serious injury. Follow the
instructions in the safety message panel.
The use of the word WARNING signifies the
presence of a serious hazard or unsafe practice
which could result in death or serious injury.
NOTICE is used to address practices not related to
physical injury.
The use of the word CAUTION signifies possible
hazard or unsafe practice which could result in
minor or moderate injury.
Safety instruction(or equivalent) signs indicate
specific safety-related instructions or procedures.
General Operational Safety
Precautions
Read and understand the Owner’s/User’s Manual and
become thoroughly familiar with the equipment and its
controls before operating the transport vehicle restraint.
Never operate a transport vehicle restraint while a
safety device or guard is removed or disconnected.
Never remove DANGER, WARNING, or CAUTION
signs, Placards or Decal’s on the equipment unless
replacing them.
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2Manual No. 4111-0019
May 2015
July 2016
SAFETY
Stay clear of dock leveling device when transport
vehicle is entering or leaving area.
Do not move or use the dock leveling device if
anyone is under or in front of it.
Keep hands and feet clear of pinch points. Avoid
putting any part of your body near moving parts.
Failure to follow these instructions will result in
death or serious injury.
Chock/restrain all transport vehicles, Never remove
the wheel chocks until loading or unloading is
finished and transport driver has been given
permission to drive away.
Do not use a broken or damage dock leveling
device. Make sure proper service and maintenance
procedures have been performed before using.
Make sure lip overlaps onto transport vehicle bed at
least 4 in. (102 mm).
Keep a safe distance from both side edges.
Failure to follow these instructions could result in
death or serious injury.
Operational Safety PrecautionsOperational 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.

3
Manual No. 4111-0019
May 2015
July 2016
SAFETY
Operational Safety Precautions
Do not use dock leveling device if transport vehicle
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.
Failure to follow these instructions could result in
death or serious injury.

4Manual No. 4111-0019
May 2015
July 2016
SAFETY
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 recom-
mended and good safety practice to use an addi-
tional 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. Failure to follow these instructions
will result in death or serious injury.
Maintenance Safety Precautions
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 will result in
death or serious injury.
1.50"
3.00"
Decal Size: 1.5 x 3
File Name: 1751-0736 Rev A
Arc Flash and
Shock Hazard
PPE [Personal Protection
Equipment] Required
De-energize equipment before
working on or inside. Do not
open cover without appropriate
PPE. Refer to NFPA 70E for
PPE requirements. This panel
may contain more than one
power source.
Hazardous Voltage
Will Result in Death
or Serious Injury
1751-0736 Rev A
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.
Failure to follow these instructions could result in
death or serious injury.
ALWAYS stand clear of dock leveler lip when
working in front of the dock leveler.
Failure to follow these instructions could result in
death or serious injury.
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 could result in
death or serious injury.
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. Failure to follow these
instructions could result in death or serious injury.

5
Manual No. 4111-0019
May 2015
July 2016
SAFETY
Safety Decals
Every 90 days (quarterly) inspect all safety labels and tags
to ensure they are on the dock leveler and are easily leg-
ible. If any are missing or require replacement, please call
1-800-643-5424 for replacements.
2.40"
5.06"
Control Box Size:
Decal Size: 5.06 x 2.40
File Name: 1751-0727
CRUSH HAZARD
Maintenance prop must
support leveler behind bar.
Do not force maintenance
prop forward of bar to
support lip. Refer to
owner’s/user’s manual for
proper use. Failure to
comply will result in
death or serious injury.
DANGER
1751-0727
3.25"
9.12"
Unsupported dock leveler
ramps can lower unexpectedly.
Before allowing vehicle to leave
the dock always:
Ensure that no equipment,
material or people are on the
dock leveler.
Return the dock leveler to its
stored position at dock level.
Failure to follow posted instructions will result in death or serious injury.
SAFETY INFORMATION
Call 262.255.1510 for replacement placards, warning labels, or owner’s/user’s manuals.
Operation
1. Read and follow all instructions and
warnings in the 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 the 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 that truck bed supports
extended lip or the leveler frame
supports the ramp before driving on
ramp.
7. Stay clear of hinges and front and
sides of moving dock leveler.
8. Never use damaged or
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 on
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.
Control Box Size:
Decal Size: 9.12 x 3.25
File Name: 1751-0730
DANGER
Control Box Size:
Decal Size: 13 x 2
File Name: 1751-0329
DO NOT
FORK THIS SIDE
Control Box Size:
Decal Size:6x2
File Name: 1751-0330 REV A
FORK
HERE
1.02"
8.72"
Control Box Size:
Decal Size: 8.72 x 1.02
File Name: 1751-0788
CRUSH HAZARD
Do not work under dock leveler unless this maintenance prop has been secured in the
upright position. See owner’s/user’s manual for proper procedures. Failure to comply
will result in death or serious injury.
DANGER
1751-0788
2.40"
5.05"
Control Box Size:
Decal Size: 5.05 x 2.40
File Name: 1751-0789
CRUSH HAZARD
Open the pin latch and insert
through the maintenance
prop housing and prop
completely. Close the pin latch
to secure prop. Use every
time dock leveler is serviced.
Failure to comply will result
in death or serious injury.
DANGER
1751-0789
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. Refer to
owner’s/user’s manual for proper maintenance
procedures. Failure to comply will result in death
or serious injury.
DANGER
1751-0726
2.36"
5.92"
Control Box Size:
Decal Size: 5.92 x 2.36
File Name: 1751-0726
1751-0727
1751-0730 (x2)
1751-0788
1751-0789
1751-0726
1.43"
5.93"
Control Box Size:
Decal Size: 5.93 x 1.40
File Name: 1751-0728
CRUSH HAZARD
Do not remove main springs until leveler is safely supported by
maintenance prop. Main springs contain stored energy. Be sure
springs are fully unloaded and ends are loose before removal. Refer
to owner’s/user’s manual for proper maintenance procedure. Failure
to comply will result in death or serious injury.
DANGER
1751-0728
1751-0728
(decal placed in same position on both sides)
(decal placed in same position on both sides)
(decal placed in same position on both sides)
1751-0329 (x2)
1751-0330 (x2)
1751-0731
1751-0726 Rev B
File Name: 1751-0726 Rev B
Decal Size: 5.92 x 2.36
CRUSH HAZARD
DO NOT ENTER PIT unless dock leveler is
securely 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.
File Name: 1751-0727 Rev A
Decal Size: 5.06 x 2.40
CRUSH HAZARD
Maintenance prop must
support leveler behind bar.
Do not force maintenance
prop forward of bar to
support lip. Refer to
owner’s/user’s manual for
proper use. Failure to
comply will result in
death or serious injury. 1751-0727 Rev A
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.
Call 262.255.1510 for replacement placards, warning labels, or owner’s/user’s manuals.
File Name: 1751-0730 Rev B
Decal Size: 9.12 x 3.25
MAINTENANCE/SERVICE
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.
1. Read and follow all instructions,
w a r n i n g s a n d m a i n t e n a n c e
sched ules in the o wner‘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.
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 c hock tra iler whe els or
en gag e tr uck r es tra int b ef ore
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.
•
•
•
1751-0730 Rev B
File Name: 1751-0329 Rev A
Decal Size: 13 x 2
DO NOT
FORK THIS SIDE
1751-0329Rev A
File Name: 1751-0330 REV C
Decal Size: 5.375 x 1.75
FORK
HERE
1751-0330 Rev C
1.43"
5.93"
Control Box Size:
Decal Size: 5.93 x 1.40
File Name: 1751-0728 Rev B
1751-0728 Rev B
CRUSH HAZARD
Do not remove main springs until leveler is securely supported by a
suitable lifting device. Main springs contain stored energy. Be sure springs
are fully unloaded and ends are loose before removal. Failure to comply
will result in death or serious injury. Refer to owner’s/user’s manual for
proper maintenance procedure.
2.40"
5.05"
Decal Size: 5.05 x 2.40
File Name: 1751-0731 Rev A
CRUSH HAZARD
Open the pin latch and insert
through the maintenance
prop housing and prop
completely. 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 Rev A
1751-0729
Decal Size: 8.72 x 1.02
Material: Ritrama 3-1190 (3.5 mil thick) calendered vinyl
02 hi-tack permanent acrylic adhesive
Ritrama 3-7146 (1.0 mil thick) clear polyester laminate
File Name: 1751-0729 Rev A
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

6Manual No. 4111-0019
May 2015
July 2016
OWNER’S/USER’S RESPONSIBILITIES
1) The manufacturer shall provide to the initial purchaser and make the following information readily available
to the owners/users and their agents, 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.
2) 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. The owners/users shall
provide application information to the manufacturer to receive recommendations on appropriate equipment
specifications and capacity.
3) The Owner/User must see all nameplates, placards, decals, instructions and posted warnings are in place
and legible and shall not be obscured from the view of the operator or maintenance personnel for whom such
warnings are intended for. Contact manufacturer for any replacements.
4) Dock leveling devices may become hazardous if the manufacturer’s instructions regarding modifications or
adjustments are not followed. Modifications or alterations of dock leveling devices shall only be done made
with prior written approval from the original manufacturer. These changes shall be in conformance with all
applicable provisions of the MH30.1 standard and shall also satisfy all safety recommendations of the original
equipment manufacturer of the particular application.
5) The owner/user should recognize the inherent dangers of the interface between the loading dock and the
transport 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, operating
conditions and the manufacturer’s specific instructions provided with the dock leveling device. Maintaining,
updating and retraining 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.
6) An operator training program should consist of, but not necessarily be limited to, the following:
a) Select the operator carefully. Consider the physical qualifications, job attitude and aptitude
b) Assure that the operator reads and fully understands the complete manufacturer’s owners/users manual.
c) Emphasize the impact of proper operation upon then operator, other personnel, material being handled,
and equipment. Cite all rules and why they are formulated.
d) Describe the basic fundamentals of the dock leveling device and components design as related to safety,
e.g., mechanical limitation, stability, functionality, ect.
e) Introduce the equipment. Show the control locations and demonstrate functions. Explain how they work
when used properly and maintained as well problems when they are used improperly.
f) Assure that the operator understands the capacity rating, nameplate data, placards and all precautionary
information appearing on the dock leveling device.
g) Supervise operator practice of equipment.
h) Develop and administer written and practical performance tests. Evaluate progress during and at
completion of the course.
i) Administer periodic refresher courses. These may be condensed versions of the primary course and
include on-the-job operator evaluation.
7) Loading dock safety equipment should never be used outside of its vertical working range, or outside the
manufacturer’s rated capacity. It shall also be compatible with the loading equipment and other conditions
related to dock activity. Please consult the manufacturer if you have any questions as to the use, vertical

7
Manual No. 4111-0019
May 2015
July 2016
INTRODUCTION
General Information
MP-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)
Capacity (CIR*)
25,000 lb (11 340 kg)
30,000 lb (13 608 kg)
35,000 lb (15 876 kg)
40 000 lb (18 144 kg)
45 000 lb (20 412 kg)
55 000 lb (22 680 kg)
* CIR (Comparative Industry Rating)
Call McGuire for your specific needs.
Dock Leveler Stock Specifications
Congratulations on your choice of a McGuire dock
leveler. This manual covers the MP-series mechanical
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. To obtain
maximum performance and longest possible use,
a simple program of preventive maintenance is
recommended.
Once again, thank you and congratulations on your
purchase of a McGuire mechanical dock leveler.
working range or capacity of the equipment. Only properly trained and authorized personnel should
operate the equipment.
8) It is recommended that when the transportation vehicle is positioned as close as practical to the dock
leveling device and in contact with both bumpers, there shall be a minimum of 4.00 inches (100mm)
overlap between the front edge of the lip and the edge of the floor or sill of the transport vehicle at all
times during the loading and unloading process.
9) When goods are transferred between the loading dock and the transport vehicle, this vehicle shall
have the brakes and wheel chocks or positive restraints that provide the equivalent protection of wheel
chocks shall be engaged. 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.
10) Manufacturer’s recommended maintenance and inspection of all dock leveling devices shall be
performed in conformance with the following practices: A planned Maintenance schedule program must
be followed, only trained and authorized personnel shall be permitted to maintain, repair, adjust and
inspect dock leveling devices, and only the use of original equipment manufacturer parts, manuals,
maintenance instructions, labels, decals and placards or their equivalent. Written documentation of
maintenance, replacement parts or damage should be kept. In the event of damage, notification to the
manufacturer is required.
11) Loading dock devices that are structurally damaged or has experienced a sudden loss of support while
under load, such as might occur when a transport vehicle is pulled out from under the dock leveling
device, shall be removed from service, inspected by a manufacturer’s authorized representative, and
repaired or replaced as needed or recommended by the manufacturer before being placed back in
service.

8Manual No. 4111-0019
May 2015
July 2016
INTRODUCTION
Component Identification
1 — Lip
2 — Lip Maintenance Prop
3 — Platform
4 — Bell Crank
5 — Lip Assist Spring
6 — Hold Down Release Ring
7 — Ratchet Pawl & Bar
9 — Hold Down
10 — Platform Maintenance Prop
11— Main Base Frame
12 — Safety Leg Assy.
13 — Lip (Snubber) Spring
14 — Lip Shock Absorber
15— Safety Leg Pull Chain
16 — Lift Arm Assembly
17 — Lift (Main) Spring
18 — Prop. Pin and Clip
19 — Working Range Toe Guards

9
Manual No. 4111-0019
May 2015
July 2016
INSTALLATION
Before lowering the dock leveler into the pit, the
following must be performed:
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:
• 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 (crisscross) 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.
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)
DO NOT remove the shipping bands around the
dock leveler lip until instructed to do so.
Only trained installation professionals with the
proper equipment should install this product. Failure
to follow these instructions could result in death or
serious injury.
Post safety warnings and barricade the work area at
dock level and ground level to prevent unauthorized
use of the equipment before installation has been
completed.
Failure to follow the installation instructions could
result in damage to equipment, the facilities, and/or
death or serious injury.
Prepare Pit
B
D
C
A

Turn to page 11 for front pick up.
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.
NOTICE
DO NOT overtighten the lifting bracket hardware.
Overtightening can damage the weather seal, if
equipped.
10 Manual No. 4111-0019
May 2015
July 2016
INSTALLATION
McGuire dock levelers are designed with installation
in mind. Each unit is shipped with lifting brackets (A)
fastened to the platform side joists.
Prepare Dock Leveler
A— Lifting Bracket (2 used) B — Shipping Bands
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 could result in
death or serious injury.
NOTE: A third sling may be used to
install the unit as needed.
A
B

11
Manual No. 4111-0019
May 2015
July 2016
INSTALLATION
1. Remove any bumpers that may be banded, or
bolted to the frame of the dock leveler.
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.
REAR PICK UP FRONT PICK UP
4. Remove wood blocks that are attached to the leveler
frame before putting the dock leveler into the pit.
5. To pick up the unit from the rear, slide forks into the
fork slots and under the cross member. Shown below.
6. To pick up the unit from the front, move forks closer
together and slide over the frame and under the cross
member. It may be necessary to unband the unit to gain
access to the front, by lifting the lip up then sliding the
forks under the cross member.
Decks not shown for clarity.

12 Manual No. 4111-0019
May 2015
July 2016
INSTALLATION
A— Distance (Leveler Frame
Height)
B— Shim Locations (Under
Rear Vertical Supports,
4-5 Places TYP)
C— Shim Locations (Under
Lip Keepers, Lifter Arm
and Prop)
D— Dock Floor
E— Rear Pit Curb Angle
F— String
G— Rear Hinge Frame Angle
H— Distance (Dock Floor-to-
Pit Floor)
J— Distance (Top of Shim
Stack-to-Dock Floor)
K— Shim Stack
L— Dock Leveler Frame
M — Pyramid (Preferred)
N— Stepped (Acceptable)
P— Offset (Not Acceptable)
Q — Straight (Not Acceptable)
R — Shim between lip keeper
curb angle when required.
Install Dock Leveler
D E F G
L
K
J
H
R
M
N
P
Q
Shim
Stacking Methods

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 frame rail and to
provide a shelf for a fillet weld.
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.
13
Manual No. 4111-0019
May 2015
July 2016
INSTALLATION
NOTE: McGuire dock levelers are designed with a
nominal 1/2 in. (12.7 mm) shimming distance
to allow for pit inconsistencies.
1. Determine height of shim stack (K) for each shim
location (B) by performing the following:
a. Measure leveler frame height distance (A).
b. Measure dock floor-to-pit floor distance (H)
at each shim location (B). Write down the
dimensions obtained at each location.
c. Subtract distance (A) from distance (H) to obtain
the shim height. Repeat for each shim location.
5. Using an appropriate lifting device connected to the
lifting brackets, lower dock leveler into the pit so
rear hinge frame angle (G) is tight against rear pit
curb angle (E) 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. Add shims at front shim locations (C) so front of
dock leveler will stay level with dock floor when
leveler is resting fully on shims.
4. Put a 1/4 in. (6.6 mm) thick shim at locations (C)
(under lip keepers/maintenance prop and safety
legs). Make sure shims are larger than frame front
flat so pyramid or stepped stacking method can be
used.
NOTE: A 1/4 in. (6.6 mm) thick shim at locations (C)
is used only as a starting point. The final shim
stack height will be determined after the dock
leveler is lowered into the pit.
2. Using the results obtained in step 1, create the
individual shim stacks on the pit floor at locations
(B). Build each shim stack (K) using the pyramid
method (M) (preferred) or stepped method (N) 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 (P) or straight method (Q).
NOTE: To assist in obtaining an accurate measurement
of distance (J), use a string (F) 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 (J) [top of shim stack (K)
to dock floor]. Distance (J) must equal the dock
leveler height (A).
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 could result in
death or serious injury.

14 Manual No. 4111-0019
May 2015
July 2016
INSTALLATION
A— Front of Dock Pit
B— Dock Leveler Frame
C— Side Pit Curb Angle
D— Gap [3/4 in. (19 mm)
Minimum]
E— Pry Locations
F— Rear Hinge Frame
Angle
G— Rear Pit Curb Angle
H— Flare Bevel Weld, Typical
(To Fit Spacing)
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.
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. Make sure the leveler is in the cross-
traffic (stored) position with lip resting on lip
keepers.
11. 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.
12. If leveler cannot be squared and made level
as instructed in steps 8 – 10, contact Technical
Services.

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Manual No. 4111-0019
May 2015
July 2016
INSTALLATION
14. Remove shipping bands at this time. Allow platform
to float. Add/Remove shims as necessary to bring
platform level/flush with floor.
17. Pull and hold the release ring (located in recess at
rear of platform) until the platform is fully raised.
Check for binding as platform rises.
18. Slowly walk out onto the platform to lower the
platform. Allow the platform to lower to the cross-
traffic position. Check for binding as platform
lowers.
19. If binding occurs, reposition leveler and/or add
or remove shims as necessary. Raise and lower
platform again. If platform still binds, contact
Technical Services for further instructions.
20. Check that the leveler is flush with the dock floor
and that the platform lip contacts both lip keepers
evenly.
NOTE: The illustration on the previous page shows a
typical weld pattern. The weld pattern will vary
slightly depending on size of dock leveler.
13. With the rear hinge frame angle (F) tight against
the rear pit 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.
Alternate welding locations to distribute heat.
Welding sequentially from one end to the other
may cause warping or distortion.
15. Weld front of dock leveler frame (B) to shims
located under the keepers, then weld the shims
to the front pit curb steel.
16. Disconnect lifting device and chains from the lifting
brackets.
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 could result in
death or serious injury.
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.
ALWAYS stand clear of dock leveler lip when
working in front of the dock leveler.
Failure to follow these instructions could result in
death or serious injury.
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
lifespan of the affected components.
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 follow
these instructions could result in death or serious
injury.

16 Manual No. 4111-0019
May 2015
July 2016
INSTALLATION
21. Pull the release ring (A) to raise platform. Engage
the platform maintenance prop (B) in the service
(upright) position and lock the maintenance
prop at this position using an OSHA approved
locking device, supplied by others Engage lip
maintenance prop(C).
A— Platform Release Ring B— Platform Maintenance
Prop
C —Lip prop support D — Prop Pin and Clip E —Safety Leg Pull
Chain
25. Remove the lifting brackets from the platform side
joists.
26. Disengage the platform maintenance prop.
27. Slowly walk out onto the platform to lower the
platform until it is at the cross-traffic (stored)
position.
28. Check operation of dock leveler by cycling the
leveler at least four times.
• When the platform is at full height, lip will be fully
extended.
• Lip will begin to drop after the unit begins to
lower to truck bed.
29. Check below-dock position by walking platform
down before lip folds completely.
• Lip will be over lip keepers.
• Platform safety legs will be resting on frame.
30. Check full below-dock position by walking the
platform down. Pull and hold safety leg chain (E)
before lip folds completely.
31. If the lip does not extend fully or lip folds too quickly,
see appropriate symptom in the Troubleshooting
section.
32. Install the dock bumpers as required, clean
weld splatter and touch up with spray paint.
22. Install shims under lift arm at locations using the
pyramid shimming method. (Page 12)The lift arm
pivot must be solidly shimmed the entire length
of the lift arm pivot. Make sure the lift arm pivot is
level from side-to-side.
23. Finish weld all shims using a fillet weld.
• Weld all shims within each shim stack to each
other, then weld the shim stack to the leveler
frame.
• Weld the front leveler frame shim stacks to the
front pit curb steel if not done previously.
24. When all welding has been completed, remove all
slag then paint all the welds and shims.
Make sure the platform is properly supported in the
raised position before entering the pit to finish weld
the shims. Failure to follow these instructions could
result in death or serious injury.

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Manual No. 4111-0019
May 2015
July 2016
OPERATION
Theory
The MP-series mechanical dock leveler uses large
lift springs (18) to apply force to lift arm (17). The lift
arm pushes against the underside of the platform (3),
rolling on the cam (not pictured) forcing the platform to
rise. The force of the spring tension is just enough to
lift the weight of the platform and extend lip.
The ratchet pawl disengages only when the platform
release ring (6) is pulled AND held. Spring tension
from pawl spring causes the ratchet pawl to engage
the ratchet bar when the release ring is let go.
When the platform rises to approximately 2 – 3 inches
(51 – 76 mm) from its full raised height, the lip snubber
spring (13) and a chain pulls the lip bell crank (4)
down. This, in conjunction with the lip assist spring (5),
causes the lip linkage to push the lip out and up. The
lip assist spring also helps control the amount of time
required for the lip to fully fold.
To lower the platform, the operator walks out onto the
platform. The platform will lower until the extended lip
rests on the truck bed. If the lip did not fully extend or
there is no truck at the dock, the platform will lower
until one of the following conditions occur:
• Lip is resting on lip keepers (cross-traffic position).
• Lip did not fully fold causing the platform to rest on
safety legs (below-dock position).
• Lip did not fully fold and safety legs are retracted,
causing the platform to rest on the safety stops (full
below-dock position).
The hold-down ratchet assembly will keep the platform
at the desired position until the platform release ring is
pulled again.
To actuate the dock leveler platform, the operator
pulls and holds the platform release ring (6) located
in the recess at the rear of the platform. This causes
ratchet pawl (7) to disengage from ratchet bar (8).
With the ratchet pawl disengaged, spring tension from
lift springs (18) forces the platform to rise.
NOTE: Ratchet pawl (7) and bar (8) are part of the
hold-down mechanism (9)
1 — Lip
2 — Lip Maintenance Prop
3 — Platform
4 — Lip Bell Crank
5 — Lip Assist Spring
6 — Hold Down Release Ring
7— Ratchet Pawl & Bar
9 — Hold down
10 — Platform Maintenance Prop
11— Main Base Frame
12 — Safety Leg Assy.
13 — Snubber Spring
14 — Gas Shock
15 — Safety Leg Below Dock
Control
16— Safety Leg Retract Pull Ring
17 — Lift Arm
18 — Lift Springs
When activating the leveler, always pull swiftly AND
hold the platform release ring until the platform is at
the full raised position. Releasing the ring while the
platform is still raising may result in damage to the
equipment

18 Manual No. 4111-0019
May 2015
July 2016
OPERATION
The dock leveler operation 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.
Operating Instructions
Stay clear of dock leveler when transport vehicle
carrier is entering or leaving dock area.
DO NOT move or use the dock leveler if anyone is
under or in front of leveler.
Keep hands and feet clear of pinch points. Avoid
putting any part of your body near moving parts.
Failure to follow these instructions will result in
death or serious injury.
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 could result in
death or serious injury.
The MP 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 could result in
death or serious injury.
12 in. (305 mm)
12 in. (305 mm)
When activating the leveler, always pull swiftly AND
hold the platform release ring until the platform is at
the full raised position. Releasing the ring while the
platform is still raising may result in damage to the
equipment