Customer Information ......................................................................... 45
Warranty ................................................................................ Back Cover
e
PRECAUTIONS
Recognize Precautionary Information
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 DANGER signifies the
presence of an extreme hazard or unsafe practice
which will most likely result in death or severe
injury.
General Operational Precautions
Read and understand the Owner’s/User’s Manual and
become thoroughly familiar with the equipment and its
controls before operating the equipment.
Never operate equipment while a safety device or
guard is removed or disconnected.
Never remove DANGER, WARNING, or CAUTION
signs, Placards or Decals on the equipment unless
replacing them.
The use of the word WARNING signifies the
presence of a serious hazard or unsafe practice
which could result in death or serious injury.
The use of the word CAUTION signifies possible
hazard or unsafe practice which could result in
minor or moderate injury.
The use of the word NOTICE indicates information
considered important, but not hazard-related, to
prevent machine or property damage.
Indicates a type of safety sign, or separate panel on
a safety sign, where safety-related instructions or
procedures are described.
n
o
Z
g
n
i
t
a
r
e
p
O
n
o
Z
g
n
i
t
a
r
e
p
O
Figure 1
Do not start the equipment until all unauthorized
personnel in the area have been warned and have
moved outside the operating zone (Figure 1).
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.
e
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to
cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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.
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.
Chock/restrain all transport vehicles. Never
remove the wheel chocks or release the
restraining device until loading or unloading is
finished, and transport driver has been given
permission to drive away.
Do not use a broken or damaged dock leveling
device or restraining device. Make sure proper
service and maintenance procedures have been
performed before using.
2
Make sure lip overlaps onto transport vehicle bed
at least 4 in. (102 mm).
1. If restraint is unable to secure transport
vehicle’s RIG, use wheel chocks to secure
wheel chocks are removed. Manual reset
of BY-PASS is accomplished by pressing
the RELEASE button or turning switch to
OPERATING
PRECAUTIONS
DANGER
DANGER
• Read and follow all instructions, warnings, and maintenance schedules in
the manual and on placards.
• Vehicle restraint operation and servicing is restricted to authorized
personnel.
1. Before using the vehicle restraint:
• Remove any debris, snow, or ice that may obstruct vehicle restraint
operation.
• Alert personnel in the area of potential vehicle restraint operation and
ensure area is clear.
• Operate the vehicle restraint through one complete cycle inspecting
it for proper operation and light sequence. Advise maintenance
personnel of any damage or improper operation immediately. Remove
all malfunctioning or damaged vehicle restraints from service using
approved lockout/tagout procedures.
2. Before attempting to restrain a transport vehicle:
• Verify that transport vehicle is positioned squarely against dock
bumpers.
• Inspect the transport vehicle’s rear impact guard (RIG). Damaged or
missing RIGs, lift gates, plates or other obstructions may not allow the
vehicle restraint to securely capture the RIG. Wheel chocks must be
used whenever the ability for the vehicle restraint to capture the RIG is
in question. (NOTE: The transport vehicle’s suspension and load
condition will affect trailer height.)
3. After activating vehicle restraint:
• Verify that the transport vehicle’s RIG has been restrained successfully.
In the event this cannot be determined, use wheel chocks in addition
to restraint.
• If equipped with a light communication system, load and unload on
GREEN light only.
4. Maintenance or service must be performed by authorized personnel only.
Follow approved lockout/tagout procedures.
FAILURE TO FOLLOW THESE INSTRUCTIONS WILL RESULT IN
DEATH OR OTHER SERIOUS INJURY.
INSTRUCTIONS
VEHICLE RESTRAINTS
ENGAGE RESTRAINT
1. Open overhead door and visually check that
transport vehicle is positioned squarely against
dock bumpers and has a RIG bar. Inside light
is RED and outside light is GREEN.
2. Press the ENGAGE button to activate restraint.
3. Once RIG has been secured, inside light is
GREEN and outside light is RED
RELEASE RESTRAINT
button. When safely stored, inside light is RED
and outside light is GREEN.
BY-PASS
transport vehicle at the dock.
2. Turn switch to BY-PASS. Inside light is GREEN
and outside light is RED.
3. Loading/unloading may proceed with caution.
BY-PASS RESET
1. When loading or unloading is completed and
(RETURN TO NORMAL OPERATION)
Scan to view our owner’s/user’s manuals online.
www.LoadingDockSystems.com
1.800.643.5424
Call for additional placards, or manuals, or with questions
regarding proper use, maintenance, and repair of dock leveler.
WARNING: CANCER AND REPRODUCTIVE HARM
www.P65Warnings.ca.gov
NORMAL. Lights change to RED inside and
GREEN outside.
Use for PowerHook, PowerHold, HoldTite and TPR series
5
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.
2) 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 restraining
device 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 restraining 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. Owners/users shall
actively maintain, update and retrain all operators
on safe working habits and operations of the
equipment.
3) When selecting a restraining device, 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.
4) 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.
5) Modifications or alterations of restraining devices
shall be made only with prior written approval
from the original manufacturer. These changes
shall be in conformance with all applicable
provisions of the MH30.3 standard and shall
also satisfy all safety recommendations of the
original equipment manufacturer of the particular
application.
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 the operator, other personnel, material
being handled, and equipment. Cite all rules
and why they are formulated.
d) Describe the basic fundamentals of the
restraining device and components design as
related to safety, e.g., mechanical limitation,
stability, functionality, etc.
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
nameplate data, placards and all
precautionary information appearing on the
restraining 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) It is recommended that the transport vehicle
is positioned as close as practical to the dock
leveling device and in contact with both bumpers.
When an industrial vehicle is driven on or off a
transport vehicle during loading and unloading
operations, the transport vehicle parking brakes
shall be applied and wheel chocks or a restraining
device that provides equal or better protection of
wheel chocks shall be engaged. Also, whenever
possible, air-ride suspension systems should
have the air exhausted prior to performing said
loading and unloading operations.
8) When goods are transferred between the loading
dock and a trailer resting on its support legs/
landing gear instead of a tractor fifth wheel
or converter dolly, it is recommended that an
adequate stabilizing device or devices shall be
utilized at the front of the trailer.
9) In order to be entitled to the benefits of the
standard product warranty, the dock safety
equipment 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.
10) Manufacturer’s recommended maintenance
and inspection of all restraining 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 restraining
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) Restraining devices that are structurally damaged
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.
This manual provides current information on the TPR
UniLock® vehicle restraint. Due to ongoing product
improvement, some parts may have changed, along
with operation and troubleshooting methods. This
manual describes these changes where applicable.
The TPR UniLock is the only trailer-postioned vehicle
restraint that can automatically remove “RIG Wedge”
pressure. RIG Wedge is caused when the trailer
is pushed forward during loading/unloading and
the trailer’s Rear Impact Guard (RIG) applies so
much pressure to the restraint’s hook that the truck
driver must reverse the trailer in order to release
the restraint. The UniLock has an advanced cam
design that first rotates the hook away from the RIG
to remove the pressure, and then rotates down to a
stored position.
The UniLock vehicle restraint also has an internal
safety mechanism that locks the restraint’s hook in
place when pressure is applied, maintaining a secure
engagement. This makes it universally effective on
any obstructed Rear Impact Guard (RIG), including
intermodal trailers with cover plates that prevent the
restraint’s hook from latching on top of the RIG.
The UniLock is designed to withstand a pulling force
in excess of 32,000 lbs, and has a service range of 4”
to 10” horizontally from the face of the dock bumpers
and 9” to 30” vertically above drive approach. The
integral motor, gear and brake assembly is specifically
designed for the UniLock. The UniLock vehicle
restraint is highly adaptable to new or existing loading
docks.
To illustrate which connections are to be made in the
field at installation, electrical drawings are included
with each order or by contacting Systems, LLC
Technical Services.
Call Systems, LLC to discuss available options to
meet your specific needs.
Technical Service at 800-643-5424 or techservices@loadingdocksystems.com
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.
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.
Only trained installation professionals with the
proper equipment should install this product.
DO NOT connect the vehicle restraint electrical
wiring and ground connections until all welding has
been completed.
DO NOT ground welding equipment to any electrical
components of the vehicle restraint. Always ground
welding equipment to the vehicle restraint base,
NEVER to the moving components.
Failure to follow these instructions may damage the
motor, wiring, and/or control panel.
Do not install the UniLock vehicle restraint directly
onto a concrete block or brick dock face; contact
Systems, LLC to purchase a suitable Z-bracket.
Minimum 4” thick bumpers are required at all
positions where a UniLock vehicle restraint is
installed. DO NOT install on docks without minimum
4” thick bumpers. For thicker bumpers, consult the
factory.
Install roller track plate onto dock face at specified
location by using the fifteen (15) concrete anchors
provided, in conjunction with welding to pit steel or a
leveler frame. If required, roller track can be trimmed
up to a maximum of 5” from the bottom.
The roller track plate must be plumb with the dock
face. If not, use and weld (6) shims 2” wide x 255/8” long. Shims must be the full length of the roller
track mounting plate. If shims are over 1/2” thick, use
longer anchors. If shims need to be 1” thick or more,
contact Systems, LLC Technical Services.’
Some levelers are slightly recessed within the pit and
thus require a shim to be inserted between the roller
track plate and the leveler front subframe and welded
in place.
Note: Some mechanical dock levelers have an
adjusting nut access hole in the leveler front
subframe. If the UniLock vehicle restraint roller track
interferes with the access hole, the track plate must
be cut to allow access.
Note: Fifteen (15) concrete anchors are provided
with each UniLock vehicle restraint. An anchor must
be installed in each roller track plate hole except for
those plug-welded to embedded steel.
1. Place roller track at desired location, spaced 5/8”
above the drive.
2. Using the roller track as a guide, drill holes of
5/8” diameter and minimum of 4-5/8” deep at all
locations where roller track is not overlapping
curb steel. Clean out holes.
3. Insert anchors and drive them flush with roller
track plate, making sure that the threaded wedge
is inserted first. Do not disassemble anchors prior
to installation.
4. Once all anchors are installed, torque to 60 ft-lbs.
Welding Instructions
Note: If the installation being worked on is a retrofit
or replacement, make sure that the power source
has been tagged and locked out according to OSHA
regulations and approved local electrical codes, then
remove the motor and limit switch connections from
the control harness located in the outside junction
box.
1. Disconnect power and ground leads to dock
leveler (if equipped).
2. Plug weld all holes that are in contact with
embedded steel. All fifteen (15) holes must
be either plug welded or anchored. Minimum
electrode must be 1/8” 7018 or better.
12
3. Weld across top of roller track plate to curb steel
or leveler frame with 3” long 1/4” fillet welds.
4. Once all welding has been completed, reconnect
power and ground leads to dock leveler (if
equipped).
Do not install the UniLock vehicle restraint directly
onto a concrete block or brick dock face; contact
Systems, LLC to purchase a suitable Z-bracket.
Minimum 4” thick bumpers are required at all
positions where a UniLock vehicle restraint is
installed. DO NOT install on docks without minimum
4” thick bumpers. For thicker bumpers, consult the
factory.
Install roller track plate onto dock face at specified
location by welding to an embedded steel plate,
in conjunction with welding to pit steel or a leveler
frame, and using provided concrete anchors in the
remaining three (3) holes. If required, roller track can
be trimmed up to a maximum of 5” from the bottom.
The roller track plate must be plumb with the dock
face. If not, use and weld (6) shims 2” wide x 255/8” long. Shims must be the full length of the roller
track mounting plate. If shims are over 1/2” thick, use
longer anchors. If shims need to be 1” thick or more,
contact Systems, LLC Technical Services.’
Some levelers are slightly recessed within the pit and
thus require a shim to be inserted between the roller
track plate and the leveler front subframe and welded
in place.
Note: If the installation being worked on is a retrofit
or replacement, make sure that the power source
has been tagged and locked out according to OSHA
regulations and approved local electrical codes, then
remove the motor and limit switch connections from
the control harness located in the outside junction
box.
1. Disconnect power and ground leads to dock
leveler (if equipped).
2. Place roller track at desired location, spaced 5/8”
above the drive.
3. Plug weld all holes that are in contact with
embedded steel. All fifteen (15) holes must be
either plug welded or anchored.
4. Weld the sides of the roller track plate to the
embed mounting plate with 4” long, 1/4” llet
welds.
5. Weld across top of roller track plate to curb steel
or leveler frame with 3” long 1/4” fillet welds.
6. Once all welding has been completed, reconnect
power and ground leads to dock leveler (if
equipped).
7. Clean and touch up all welds once complete.
Anchor Installation
Note: Some mechanical dock levelers have an
adjusting nut access hole in the leveler front
subframe. If the UniLock vehicle restraint roller track
interferes with the access hole, the track plate must
be cut to allow access.
14
Note: Fifteen (15) concrete anchors are provided
with each UniLock vehicle restraint. An anchor must
be installed in each roller track plate hole except for
those plug-welded to embedded steel.
1. Using the roller track as a guide, drill holes of
5/8” diameter and minimum of 4-5/8” deep at all
locations where roller track is not overlapping
curb steel. Clean out holes.
2. Insert anchors and drive them flush with roller
track plate, making sure that the threaded wedge
is inserted first. Do not disassemble anchors prior
to installation.
3. Once all anchors are installed, torque to 60 ft-lbs.
Make sure that the power source has been locked
out and tagged according to OSHA regulations and
approved local electrical codes.
DO NOT connect the vehicle restraint electrical
wiring and ground connections until all welding has
been completed.
DO NOT ground welding equipment to any electrical
components of the vehicle restraint. Always ground
welding equipment to the vehicle restraint base,
NEVER to the moving components.
Failure to follow these instructions may damage the
motor, hydraulics, wiring, and/or control panel.
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.
Where indicated, all components must be connected
to a SAFETY EARTH GROUND that conforms to
the 1999 National Electrical Code Section 250-50
section (a) or section (c) for a grounding electrode
system.
A
B
C
Figure 11
A— Disconnect Panel
B— Control Panel
(provided by others)
C— Distance, 48 in. (1219 mm)
1. Mount the push-button control panel (B) so
bottom of control panel-to-dock floor distance (C) is
48 in. (1219 mm). See Figure 11.
2. Install electrical disconnect panel (A) if not already
installed. Disconnect panel supplied by others.
3. Install and connect the control wiring.
4. Connect the control wiring to the field wires in the
restraint junction box. Refer to the electrical diagrams
supplied with the vehicle restraint. See pages 32-33
for wiring troubleshooting if needed.
5. Seal the conduit in any location where the conduit
crosses over temperature zones that could produce
condensation.
Optional: Install spacers between the wall and
enclosure to provide temperature insulation and air
flow. If the conduit could fill with water, a drip leg
may be needed.
6. Install placard (see page 18).
17
INSTALLATION
Placard Installation Instructions
Owner/Users are responsible for the installation and placement of product
Make sure placard is in plain view of dock leveler and/or vehicle restraint
Suggested placement of placard is near control box attached to electrical conduit by using nylon tie. If there is no control box present, mount placard
Placard Installation Instructions
• Owner/Users are responsible for the installation and placement of product
placards.
placards.
• Make sure placard is in plain view of dock leveler and/or vehicle restraint
operations.
operations.
• Suggested placement of placard is near control box attached to electrical
conduit by using nylon cable tie. If there is no control box present, mount placard
on wall to the immediate left of leveler at eye level.
on wall to the immediate left of leveler at eye level.
Nylon Tie
C
Conduit
D
C
D
A
Control Box
A
(Placard placement shown
B
Placard
B
as example only.)
(Placard placement shown as reference only.)
A - Control BoxB - PlacardC - Nylon Cable TieD - Conduit
Stay clear of dock leveler and vehicle restraint
when transport vehicle is entering or leaving dock
area.
DO NOT move or use the dock leveler or restraint
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.
Only trained personnel should operate the dock
leveler and vehicle restraint.
DO NOT use a broken or damaged dock leveler
or vehicle. Make sure proper service and
maintenance procedures have been performed on
the equipment before using.
OPERATION
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.
Once the vehicle restraint has been activated, the
dock attendant must visually inspect to assure that
the restraint hook has properly engaged the Rear
Impact Guard (RIG) bar.
1. Check that the transport vehicle is positioned
squarely against both dock bumpers.
• Inside light - RED
• Outside light - GREEN
2. Push ENGAGE button to activate restraint.
• Inside lights - AMBER
• Outside light - RED
3. Restraint will ENGAGE on transport vehicle RIG.
• Inside light - GREEN
• Outside light - RED
4. Visually inspect restraint for proper engagement.
5. Position dock leveler onto transport vehicle.
6. When loading or unloading is complete, return
dock leveler to the stored position.
7. Push RELEASE button to store restraint.
• Inside lights - AMBER
• Outside light - RED
Operation - Auto Re-Engage
Note: Auto Re-Engage requires an iDock Control
System. Units without an iDock Control System do
not have this functionality.
After restraint has been engaged with successful
capture of RIG bar, these restraints will automatically
attempt to re-engage if they leave the working zone:
• When restraint hook is lowered to the stored
position without pressing the RELEASE button,
the controls will automatically attempt to reengage the hook one (1) time.
• If hook successfully captures the RIG bar
again, the light communication will remain the
same.
• If hook is unable to return to the working
zone after one (1) attempt, the hook will
automatically return to the stored position,
and the iDock Control System will alert
the operator that the restraint is no longer
engaged with a Bypass Mode prompt. See
“Operation - Unsuccessful Engage.
A— Tag Out Device B —Lock Out Device C — Maintenance Prop D— Header
When working with electrical or electronic controls,
make sure that the power source has been tagged (A)
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.
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 is not limited to a
boom truck, fork truck, stabilizing bar or equivalent.
and locked out (B) according to OSHA regulations*
and approved local electrical codes (see Figure 16).
Whenever maintenance is to be performed under
the dock leveler platform, support the platform with
maintenance prop (C). Position the maintenance
prop behind front header plate (D) while staying clear
of the lip. The lip will fold down after the platform
has rested on the maintenance prop. Lock the
maintenance prop in the service (upright) position
using an OSHA approved lockout device* (B) and
tag out device* (A). See Figures 17 and 18.
A
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.
24
Only the person servicing the equipment should have
the capability to remove the lockout devices. The tag
out devices* must inform that repairs are in process
and clearly state who is responsible for the lockout
condition.
A hard hat or other applicable head protection
should always be worn when working under or
around a dock leveler.
Always stand clear of platform lip when working in
front of the dock leveler.
* Refer to OSHA regulations 1910.146. Confined Space and 1910.147. Lockout/Tagout
• Verify that all inside and outside signal lights and
alarm (if equipped) work correctly.
Weekly Maintenance
• Operate the vehicle restraint through the complete
operating cycle to maintain lubrication.
• Remove debris around UniLock vehicle restraint
and in roller track.
• Verify carriage assembly is able to move up and
down freely with no binding or obstruction.
• Inspect motor and spring covers.
• Inspect latch barrier blocks for wear or damage;
replace as needed.
• Inspect latch plates and retaining ring on pivot pin
for damage or wear.
• Inspect latch plates and verify they rotate without
binding or obstructions. DO NOT lubricate the latch plates.
• Complete Weekly Maintenance.
• Inspect the following for damage/abnormal wear:
• Check welds for cracks.
• Check motor mount bolts.
• Pivot pins and mounting holes.
• Check J-box for water damage.
• Control box and conduit for damage.
• Light bulbs and lenses.
• Bumpers for more than 1” of wear. Replace
worn, loose, damaged or missing bumpers.
• Lubricate the rollers at the fittings located on the
top and bottom axle with a synthetic oil-base moly
grease with a temperature range of –40° to 170° F.
• Lubricate the hook weldment at the tting with a
synthetic oil-base moly grease with a temperature
range of –40° to 170° F.
• Remove retaining ring, remove pivot pin and latch
plates, clean off dirt debris and other foreign matter
from the assembly and mating surfaces. Reinstall
parts; verify parts are moving freely without binding
or obstruction. DO NOT lubricate the latch plates.
• Inspect warning decals and placards. Replace if
damaged or missing
• Inspect chain tension, verify 1/8-1/4 inch of play.
• Lubricate drive chain and limit switch mounting
bracket between drive sprocket and cam with a
synthetic oil-base moly grease with a temperature
range of –40° to 170° F.
• Verify brake torque is greater than 42 ft-lbs and
less than 58 ft-lbs at the hook shaft, while rotating the
hook from ENGAGED (45 deg) to STORED.
• Check that all concrete anchor bolts are torqued
to 60 ft-lbs.
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 is not limited to a boom truck, fork
truck, stabilizing bar or equivalent.
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.
A hard hat or other applicable head protection
should always be worn when working under or
around a dock leveler.
Always stand clear of platform lip when working in
front of the dock leveler.
Drive Chain Adjustment
If the hook is dropping from the engaged to stored
position with very little effort, or seems like it is binding
and takes an unusually high amount of effort, a brake
torque adjustment may be required.
Verify brake torque is greater than 42 ft-lbs and less
than 58 ft-lbs at the hook shaft, while rotating the
hook from ENGAGED (45 deg) to STORED (see
Figures 19 and 20):
1. Loosen brake adjuster locknut while holding the
adjuster screw to prevent inadvertent adjustment.
2. Turn adjuster screw clockwise to increase brake
torque as needed.
3. Tighten adjuster locknut while holding the adjuster
screw to prevent inadvertent adjustment.
4. Verify brake torque is greater than 42 ft-lbs and
less than 58 ft-lbs at the hook shaft, while rotating
the hook from ENGAGED (45 deg) to STORED;
readjust as required.
Inspect the drive chain periodically for dirt and chain
slack. Open the motor enclosure and clean the chain
with solvent. After cleaning, spray with a high quality
chain spray type lubricant.
The drive chain should not have more than 1/4” slack
(see Figures 19 and 20). To tighten chain:
1. Open motor enclosure and loosen the four (4)
motor mounting bolts.
2. Pry the motor assembly forward, in the slotted
holes, until the chain is tight with proper alignment
between sprockets.
3. Hold in this position and tighten the four (4) motor
mounting bolts to 96 in-lbs in 10 in-lb increments.
Adjust Dock Leveler and Vehicle Restraint Interlock
Dock Leveler & Vehicle Restraint Interlock
Options
There are two options to interlock the dock leveler
and vehicle restraint*:
• Restraint Engage before Leveler Operate (RELO)
Interlock: Dock leveler can be interlocked with
a vehicle restraint to prevent the leveler from
operating until the restraint has engaged the
transport RIG (Rear Impact Guard) when the
OPERATION MODE is NORMAL and has NOT
been switched to BYPASS MODE.
• Leveler Stored before Restraint Release (LSRR)
Interlock: Vehicle restraint is interlocked with
the dock leveler so that the restraint cannot be
operated until the leveler is stored in the cross
traffic position (lip fully folded, inside the keepers,
and the platform level with the dock floor).
Interlocking is overridden when the OPERATION
MODE is in BYPASS. This allows the independent
operation of the leveler (the restraint cannot be
operated in BYPASS MODE).
Pressing the restraint RELEASE button when in
BYPASS mode will return the leveler to NORMAL
operating mode.
Special interlocking options are available upon
request. Call Systems, LLC to discuss interlock
options to meet your specific needs.
*Dock levelers equipped with Auto-Return-To-Dock
have limited interlocking options. Auto-ReturnTo-Dock feature is not available for dock levelers
equipped with combination dock leveler/vehicle
restraint control panels.
Adjust Dock Leveler and Vehicle Restraint Interlock
1. The dock leveler should be in the cross traffic
position before beginning tests.
ADJUSTMENTS
2. Back a transport vehicle with RIG bar into dock. A
test fixture may be used to simulate the RIG bar.
Use care to avoid damage to the equipment or harm
to the operator.
3. Press the RAISE button. The dock leveler should
NOT raise. If the leveler did not raise, proceed with
step 4. If the leveler did raise, loosen U-bolts (A)
and adjust microswitch mounting plate forward so
that switch feeler arm (B) is engaged by leveler lip
when stored. See Figure 21.
4. Momentarily press the ENGAGE button. The vehicle
restraint automatic engage cycle will be activated
and the restraint will engage the transport vehicle
RIG bar.
5. Raise the dock by pressing the RAISE button until
the lip is fully extended. Release the RAISE button.
The leveler will drop to the floor of the transport
vehicle. If a RIG test fixture is used it should allow
the leveler to drop to the full below-dock position
without the contact between the lip and test fixture.
B
A
Figure 21
6. Press the RELEASE button. The vehicle restraint
should NOT disengage from the transport vehicle
RIG bar or test fixture. If the vehicle restraint did
NOT engage, proceed with step 7. If the vehicle
restraint DID disengage, loosen U-bolts (A) and
adjust microswitch mounting plate backward so that
switch feeler arm (B) is not engaged by leveler lip in
below-dock position. See Figure 21.
IMPORTANT: If adjustments are required in this
step, make sure that the interlocking described in
step 3 is still in effect after step 6 adjustments are
complete.
7. Press the RAISE button. The dock leveler will
raise. The leveler lip will fold as the platform raises.
When the lip is fully folded, release the RAISE push
button. The leveler will descend to the cross traffic
position.
8. Momentarily press the RELEASE button. The
vehicle restraint will return to the stored position.
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.
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 is not limited to a
boom truck, fork truck, stabilizing bar or equivalent.
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.
SymptomPossible CauseSolution
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.
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.
A hard hat or other applicable head protection
should always be worn when working under or
around a dock leveler.
Always stand clear of platform lip when working in
front of the dock leveler.
• Make sure the correct voltages are present at the
proper locations inside the control panel(s).
UniLock vehicle restraint
lights do not ash, and
the hook does not raise.
UniLock vehicle restraint
lights are ashing, but
the hook does not raise
or lower to full extent.
Power source malfunction.Check for blown fuse at branch circuit disconnect.
Incorrect wiring.Verify electrical schematics.
Chain is loose or broken.Adjust or replace as required.
Low incoming voltage.Verify incoming power at L1 and L2.
Drive motor faulty.Check motor, repair or replace.
Incorrect wiring.Verify wiring per electrical schematic.
Incorrect brake torque.Brake torque should greater than 42 ft-lbs.
NOTE: Refer to Figure 26 for orientation of vehicle
restraint and Figure 27 for example of decals.
The model/serial number decal is located on the
right side panel of the restraint.
When you receive your new equipment, write down the
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, B) becomes lost or
damaged.
Also, write down Systems, LLC’s order number, the
company that installed the equipment, and the original
owner’s name. This will all help to identify the specific
equipment if more information is required.
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
SYSTEMS, LLC 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 LLC, covered by this warranty, SYSTEMS LLC 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 LLC 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.
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.