RITE-HITE DOK-LOK VBR-300M User manual

Vehicle Restraint
Owner’s Manual
This Manual Covers Restraints Built After Serial Numbers:
VB3001000 and up
PRINTED IN U.S.A.
RITE-HITE PRINT SHOP
PUBLICATION NO. 1168
AUGUST 2016
VBR-300M Dok-Lok®
MADE IN U.S.A.

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
2 Pub. No. 1168 - August 2016

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
Pub. No. 1168 - August 2016 3
Table Of Contents
Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
FCC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Owner Responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Denition and Function . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
INTRODUCTION
The VBR-300MNL DOK-LOK vehicle restraint by Rite-Hite®is intended to provide a safer workplace for workers in
shipping and receiving dock areas. The VBR-300MNL DOK-LOK vehicle restraint is a manually activated restraint device
that, when properly installed and operated, retains a secure connection between the truck and dock. Signal lights, warning
horn and signs provide instructions to the truck driver and DOK-LOK vehicle restraint operator that a safe condition exists.
The DOK-LOK vehicle restraint is operated by lifting or lowering the barrier with an operating bar.
PRODUCT SPECIFIC WARRANTY
RITE-HITE Company, LLC and its a󰀩liates (collectively “RITE-HITE”) warrants to the owner (“Owner”) that the
VBR-300MNL Dok-Lok®Vehicle Restraints by Rite-Hite®sold to the Owner will be free of defects in design, materials and
workmanship (ordinary wear and tear excepted) for a period of 1 year parts and labor.
IMPORTANT
Read and understand contents of this manual prior to installation or operation of this equipment.
For best results, have this product serviced by your authorized Rite-Hite®representative.
NOTICE TO USER
Your local Rite-Hite® representative provides a Planned Maintenance Program (P.M.P.) which can be tted to your specic
operation. Call your local representative or Rite-Hite®at 414-355-2600.
The Rite-Hite products in this manual are covered by one or more of the following U.S. patents: 5882167, 6065172,
6070283, 6085375, 6092970, 6106212, 6116839, 6190109, 6276016, 6311352, 6318947, 6322310, 6360394, 6368043,
6431819, 6488464, 6524053, 6726432, 6773221, 6832403, 6880301, 7032267, 7062814, 7213285, 7216391, 7363670,
7380305, 7503089, 7533431, 7546655, 7584517, 7681271, 7823239, 7841823, 7877831, 7914042, 8006811, 8065770,
8141189, 8191194, 8286757, 8287223, 8303235, 8307956, 8443474, 8464384, 8464846, 8465245, 8497761, 8499897,
8544130, 8547234, 8590087, 8590673, 8616826, 8657551, 8662535, 8678736, 8690087, 8905198, 9010501, 9096170,
9096397, 9126775, 9139384, 9145273, 9150367, 9174811, 9227799, 9230419 and pending U.S and foreign patent
applications. RITE-HITE®, THINMANTM, SAFE-T-LIP®, HYDRACHEK®, WHEEL-LOKTM, DOK-LOK®, DUAL-DOK®,
SAFE-T-STRUTTM, DOK-COMMANDER®, JUMBOTM, HYDRA-RITETM, SAFE-T-GATE®, RITE-VUTM LIGHT
COMMUNICATION SYSTEM and SMOOTH TRANSITION DOK SYSTEMTM, are trademarks of Rite-Hite®.

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
4 Pub. No. 1168 - August 2016
FIGURE 1 - LOCKOUT/TAGOUT
LOCKOUT/TAGOUT PROCEDURES
The Occupational Safety and Health Administration requires that, in addition to posting safety warnings and barricading
the work area, the power supply has been locked in the OFF position or disconnected. It is mandatory that an approved
lockout device is utilized. An example of a lockout device is illustrated. The proper lockout procedure requires that the
person responsible for the repairs is the only person who has the ability to remove the lockout device.
In addition to the lockout device, it is also a requirement to tag the power control in a manner that will clearly note that
repairs are under way and state who is responsible for the lockout condition. Tagout devices have to be constructed and
printed so that exposure to weather conditions or wet and damp locations will not cause the tag to deteriorate or become
unreadable.
RITE-HITE®Corporation does not recommend any particular lockout device, but recommends the utilization of an
OSHA approved device (refer to OSHA regulation 1910.147). RITE-HITE®Corporation also recommends the review
and implementation of an entire safety program for the Control of Hazardous Energy (Lockout/Tagout). These
regulations are available through OSHA publication 3120.
This is the highest level statement. Failure to
follow the listed instructions will most likely result
in severe injury or death.
The statements used with this level of
warning deal with a safe operating
procedure. If the procedure is ignored, the
possibility of personal injury may exist.
IMPORTANT is used to draw attention
to a procedure that needs to be followed to prevent
machine or property damage.
When working with electrical or electronic controls,
make sure that the power source has been locked
out and tagged according to OSHA regulations and
approved local electrical codes.
SAFETY WARNINGS
This is a statement of serious hazard. Failure
to follow the listed instructions could place the
individual at risk of serious injury or death.

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
Pub. No. 1168 - August 2016 5
FCC COMPLIANCE
FCC COMPLIANCE
NOTE: This equipment has been tested and found to
comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference when the equipment
is operated in a commercial environment. This
equipment generates, uses, and can radiate
radio frequency energy and, if not installed
and used in accordance with the instruction
manual, may cause harmful interference to radio
communications. Operation of this equipment
in a residential area is likely to cause harmful
interference in which case the user will be required
to correct the interference at his or her own
expense.
NOTE: Changes or modications not expressly approved
by the party responsible for compliance could void
the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following to conditions: (1) This
device may not cause harmful interference, and (2) this
device must accept any interference received, including
interference that may cause undesirable operation.

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
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OWNER RESPONSIBILITY
1. The owner should recognize the inherent danger of
the interface between dock and transport vehicle. The
owner should, therefore, train and instruct operators
in the safe use of dock equipment in accordance with
the information provided below. The manufacturer shall
publish, provide to the initial purchaser, and make the
following information readily available to owners:
• Installation instructions
• Recommended initial and periodic inspections
procedures
• Maintenance procedures
• Operating instructions
• Descriptions or specications for replaceable or
repairable parts
• Tables identifying the grade (slope) for all variations
of length or conguration of the dock equipment,
and
• Information identifying the maximum uncontrolled
drop encountered upon sudden removal of support
while within the working range of the equipment.
It shall be the responsibility of the owner to verify that
the material listed in this section has been received
and that it is made available for the instruction
and training of presonnel entrusted with the use or
maintenance of the dock equipment.
2. When a transport vehicle is parked at a loading dock, it
is important that the vehicle is relatively perpendicular
to the dock face and in close contact with at least one
of the dock bumpers.
3. Nameplates, cautions, instructions, and posted
warnings shall not be obscured from the view of
operating or maintenance personnel for whom such
warnings are intended.
4. Manufacturer’s recommended periodic maintenance
and inspection procedures in e󰀨ect at date of
shipment shall be followed, and written records of the
performance of these procedures should be kept.
5. As with any piece of machinery, dock equipment
requires routine maintenance, lubrication, and
adjustments. Your local Rite-Hite representative o󰀨ers
owners the option of a Planned Maintenance Program
(P.M.P.). As part of this service, your local Rite-
Hite representative will do all routine maintenance,
lubrication, and adjustments.
6. Dock equipment that is structurally damaged shall be
removed from service, inspected by a manufacturer’s
authorized representative, and repaired as needed
before being placed back in service.
7. The manufacturer shall make available replacement
nameplates, caution/instruction labels, and operating/
maintenance manuals upon request of the owner. The
owner shall see that all nameplates, caution/instruction
markings or labels are in place and legible, and that
the appropriate operating/maintenance manuals are
provided to users.
8. Modications or alterations of dock equipment shall
be made only with written permission of the original
manufacturer. These changes shall also satisfy all
safety recommendations of the original equipment
manufacturer for the particular application of the dock
equipment.
9. In order to be entitled to the benets of the standard
product warranty, the dock equipment must have been
properly installed, maintained and operated within its
rated capacities and/or specic design parameters,
and not otherwise abused.
10. It is recommended that trailers equipped with air
ride suspensions should remove the air from the
suspension to minimize trailer bed drop, prior to
loading or unloading.
11. When industrial trucks are driven on and o󰀨 transport
vehicles during the loading and unloading operation,
the brakes on the transport vehicle shall be applied
and wheel chocks or a positive restraining device shall
be engaged.
12. It is recommended that an adequate stabilizing device
or devices be employed at the front of the trailer in all
cases where a trailer is being loaded or unloaded with
the trailer resting on its support legs (landing gear)
rather than a tractor fth wheel or a converter dolly.
13. In selecting dock equipment, it is important to consider
not only present requirements but also future plans or
adverse environments.

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
Pub. No. 1168 - August 2016 7
DEFINITION AND FUNCTION FEATURES
The VBR-300ALP DOK-LOK vehicle restraint is a manually
activated, ground stored restraint device used to secure trucks
and semi-trailers with an intact Rear Impact Guard (R.I.G.) to the
face of a loading dock. This is achieved by securing the R.I.G.
with a steel barrier positioned by a gas spring. This prevents
forward movement of the truck/trailer that may create an unsafe
void between the face of the dock and the rear end of the truck/
trailer as a forklift travels from the loading dock onto the trailer; or
to create an obstruction noticeable to the truck driver, should the
driver accidentally try to pull the truck/trailer away while it is being
serviced.
The proper or improper activation of the barrier is monitored by:
• VISUAL CONTROL
— One set of ashing green or red lights located at the
inside of the building for the forklift operator, and one
set located outside of the building for the truck driver. In
addition to the lights, there are three instruction signs.
• AUDIO CONTROL
— A horn will sound at the inside of the building, warning
the forklift operator if there is no R.I.G. present, or if the
engagement is improper. In this case, the trailer must
be secured by other means (wheel chocks, etc.) prior to
servicing trailer.
Prerequisite for proper barrier engagement is that the trailer is
parked rmly against a 4” (trade standard) thick dock bumper.
The activation/deactivation is solely controlled from the inside of
the building by momentarily depressing either the Lock (raise)
button or the Unlock (lower) button.
The normal mode of the barrier is in the lower STORED
position, showing a ashing red light (trailer not secured) at the
inside of the building and a ashing green light (trailer free to
move to or away from the loading dock) at the outside of the
building.
Once the trailer is parked, the dock attendant will lift the barrier
with the operating bar. This will raise the barrier to engage the
R.I.G. As soon as the R.I.G. is properly locked, there will be
simultaneous light change — the inside will change from red to
green ashing (trailer secured) and the outside will change from
green to red ashing (do not move trailer). After the service is
completed, the dock attendant will have to lower the barrier with
the operating bar to its stored position and press the UNLOCK
button to change the lights. A proper barrier engagement is
achieved when the barrier raises unobstructed to secure the
horizontal cross member of the R.I.G. Assembly. An improper
barrier engagement is if the horizontal cross member of the
R.I.G. is missing, obstructed or it is bent or located so far toward
the rear axle of the trailer that it will prevent the free passage of
the barrier. In either case, the lights will stay in a non-serviceable
mode and a horn will sound. At this point, the trailer must be
secured by other means (example: wheel chocks) in order to
become serviceable.
Refer to Figure 2, page 8 for locations of these features:
R.I.G.
Acronym used for the Federally mandated rear impact guard
located on the rear of over the road trailers to prevent accidental
underride by automobiles.
ROLLER TRACK ASSEMBLY
Mounted to the loading dock wall to guide the barrier assembly
in a vertical plane and transmit the creep or pull out force from a
trailer to the loading dock wall.
BARRIER ROLLER ASSEMBLY
Comprised of a steel roller housing, a pre-lubricated needle
bearing to allow easy movement of the barrier assembly.
GAS SPRING
Keeps barrier assembly in constant contact with the R.I.G.
R.I.G. SENSOR
Detects when the barrier is secured to the R.I.G.
BARRIER ASSEMBLY
Secures R.I.G. to prevent trailer from rolling/creeping away from
the dock.
BASE COVER
Protects the barrier assembly, oat mechanism, hydraulic hoses
and lift cylinder from debris.
TRACK COVER WITH INTEGRAL LIP GUIDE
Keeps debris out of the roller track. Integral lip guide is used to
guide the lip past the roller track assembly in a below dock end
load condition.
CONTROL BOX, OUTSIDE LIGHT BOX AND SIGNAGE
Combination of these components is used to provide audio/visual
communications to the dock attendant and trailer driver.
OPERATING BAR AND BRACKET
Used to position the barrier assembly from inside of building.
Bracket provides storage for Operating Bar while not in use.

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
8 Pub. No. 1168 - August 2016
VBR-300ALP
control
box
FIGURE 2 - VBR-300MNL DOK-LOK VEHICLE RESTRAINT FEATURES

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
Pub. No. 1168 - August 2016 9
• Before loading or unloading a vehicle at your
loading dock while using a DOK-LOK vehicle
restraint, always visually inspect to be sure
that the barrier blocks the R.I.G. assembly. If
a condition occurs that cannot be remedied
by backing the trailer rmly against the dock
bumpers, secure the trailer by other means.
• Be sure that the area around the R.I.G. assembly
is free of plates or other obstructions.
• Always operate the DOK-LOK vehicle restraint
from the top of the dock.
• Inspect all restraint lights daily to make certain
they work properly.
• Perform maintenance on restraints in
accordance with Maintenance section in this
manual.
• DOK-LOK vehicle restraints should be operated
only by authorized personnel who have read
and understand the Owner’s Manual.
• Call your local representative or Rite-Hite at
[phone] with any questions.
FAILURE TO FOLLOW THESE PROCEDURES COULD
ALLOW UNEXPECTED TRAILER / LOADING DOCK
SEPERATION RESULTING IN DEATH OR SERIOUS
INJURY!
Stored Position / Restraint UNLOCKED
Barrier is in the STORED position. Inside light is ashing
red alerting forklift operator unsafe condition exists.
Outside light is ashing green alerting truck driver it is safe
to back in.
OPERATING PROCEDURES
Outside Lights
OUTSIDE LIGHT
STATUS
Inside Lights
CONTROL BOX
STATUS
RESTRAINT POSITION
RED
GREEN
OUTSIDE LIGHTS
Checkoutside lights when
bothLEDs are o.
UNLOCK
LOCK
HORN OVERRIDE
DOK-LOK®
DO NOT ENTER TRAILER
ENTER TRAILER
Visually inspect before loading/
unloading vehicle. DOK-LOK
hook must secure rear impact
guard. See warnings on side
panel.
Additional warning labels,
manuals and other information
are available by calling:
1-800-456-0600
If red light is on and/or horn
sounds, DOK-LOK is not
properly engaged.
Check operation of DOK-LOK.
Vehiclemay not be against dock.
R.I.G. may not be compatible.
Hook travel may be obstructed.
Before using "HORN OVERRIDE,"
secure vehicle by other means.
FIGURE 3 - STORED POSITION

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
10 Pub. No. 1168 - August 2016
Restraint Locking, LOCK Button Pressed
Trailer has backed into loading dock and is parked rmly
against dock bumpers. Operator lifts barrier by hooking
beneath the barrier pull out bar with the operating bar.
Inside light is ashing red and horn is pulsing, alerting the
operator that an unsafe condition exists and barrier is in
transit. Outside light is ashing red alerting truck driver not
to move. If R.I.G. cannot be captured, go to Hook Fault
State.
Restraint LOCKED
Once the R.I.G. is obstructed by the barrier, a LOCKED
condition exists. Inside light is ashing green alerting the
forklift operator a safe condition exists. Outside light is
ashing red alerting truck driver not to move.
If during loading/unloading the inside light turns red and
the horn sounds, go to Hook Fault State.
Operating Bar
OUTSIDE LIGHT
STATUS
CONTROL BOX
STATUS
RESTRAINT POSITION
Outside Lights
Inside Lights
RED
GREEN
OUTSIDE LIGHTS
Checkoutside lights when
bothLEDs are o.
UNLOCK
LOCK
HORN OVERRIDE
DOK-LOK
®
DO NOT ENTER TRAILER
ENTER TRAILER
Visually inspect before loading/
unloading vehicle. DOK-LOK
hook must secure rear impact
guard. See warnings on side
panel.
Additional warning labels,
manuals and other information
are available by calling:
1-800-456-0600
If red light is on and/or horn
sounds, DOK-LOK is not
properly engaged.
Check operation of DOK-LOK.
Vehiclemay not be against dock.
R.I.G. may not be compatible.
Hook travel may be obstructed.
Before using "HORN OVERRIDE,"
secure vehicle by other means.
FIGURE 4 - RESTRAINT LOCKING
Visually inspect to ensure that the DOK-LOK barrier
obstructs the R.I.G. of the trailer being serviced
before operating the dock leveler.
OUTSIDE LIGHT
STATUS
CONTROL BOX
STATUS
RESTRAINT POSITION
Outside Lights
Inside Lights
RED
GREEN
OUTSIDE LIGHTS
Checkoutside lights when
bothLEDs are o.
UNLOCK
LOCK
HORN OVERRIDE
DOK-LOK®
DO NOT ENTER TRAILER
ENTER TRAILER
Visually inspect before loading/
unloading vehicle. DOK-LOK
hook must secure rear impact
guard. See warnings on side
panel.
Additional warning labels,
manuals and other information
are available by calling:
1-800-456-0600
If red light is on and/or horn
sounds, DOK-LOK is not
properly engaged.
Check operation of DOK-LOK.
Vehiclemay not be against dock.
R.I.G. may not be compatible.
Hook travel may be obstructed.
Before using "HORN OVERRIDE,"
secure vehicle by other means.
FIGURE 5 - RESTRAINT LOCKED

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
Pub. No. 1168 - August 2016 11
Restraint UNLOCKING, UNLOCK Button
Pressed
Barrier travels from the LOCKED position to the STORED
position. Inside light is steady red alerting the operator that
an unsafe condition exists and hook is in transit. Outside
light is ashing red alerting truck driver not to move. If horn
sounds go to FAULT state, otherwise go to STORED.
FAULT State From LOCKING State
Barrier cannot obstruct the R.I.G. This could be due to a
R.I.G. that is located too far toward the rear axle, bent,
obstructed or missing. Inside light is ashing red and horn
is pulsing, alerting the forklift operator that the trailer is not
locked. Outside light is ashing red alerting the truck driver
not to move.
If the trailer is parked rmly against the dock bumpers
go to HORN OVERRIDE state. If not, press UNLOCK to
clear the fault, have trailer back up and repeat Restraint
LOCKING.
FAULT State From UNLOCKING State
Barrier cannot retract to the STORED position. The barrier
could be caught on the R.I.G. or another part of the trailer.
Inside light is ashing red and horn is pulsing, alerting the
forklift operator that the trailer is not locked. Outside light is
ashing red alerting the truck driver not to move.
Make sure trailer is parked rmly against the dock
bumpers. If not, press LOCK to entrap R.I.G., have trailer
back up and repeat Restraint UNLOCKING.
OUTSIDE LIGHT
STATUS
CONTROL BOX
STATUS
RESTRAINT POSITION
Operating Bar
Outside Lights
Inside Lights
RED
GREEN
OUTSIDE LIGHTS
Checkoutside lights when
bothLEDs are o.
UNLOCK
LOCK
HORN OVERRIDE
DOK-LOK
®
DO NOT ENTER TRAILER
ENTER TRAILER
Visually inspect before loading/
unloading vehicle. DOK-LOK
hook must secure rear impact
guard. See warnings on side
panel.
Additional warning labels,
manuals and other information
are available by calling:
1-800-456-0600
If red light is on and/or horn
sounds, DOK-LOK is not
properly engaged.
Check operation of DOK-LOK.
Vehiclemay not be against dock.
R.I.G. may not be compatible.
Hook travel may be obstructed.
Before using "HORN OVERRIDE,"
secure vehicle by other means.
FIGURE 6 - RESTRAINT UNLOCKING
OUTSIDE LIGHT
STATUS
CONTROL BOX
STATUS
RESTRAINT POSITION
Outside Lights
Inside Lights
RED
GREEN
OUTSIDE LIGHTS
Checkoutside lights when
bothLEDs are o.
UNLOCK
LOCK
HORN OVERRIDE
DOK-LOK®
DO NOT ENTER TRAILER
ENTER TRAILER
Visually inspect before loading/
unloading vehicle. DOK-LOK
hook must secure rear impact
guard. See warnings on side
panel.
Additional warning labels,
manuals and other information
are available by calling:
1-800-456-0600
If red light is on and/or horn
sounds, DOK-LOK is not
properly engaged.
Check operation of DOK-LOK.
Vehiclemay not be against dock.
R.I.G. may not be compatible.
Hook travel may be obstructed.
Before using "HORN OVERRIDE,"
secure vehicle by other means.
FIGURE 7 - FAULT STATE

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
12 Pub. No. 1168 - August 2016
HORN OVERRIDE State, HORN OVERRIDE
Button Pressed after Securing Trailer by
Alternate Means
An alternate means of securing the truck must be used
(i.e. wheel chocks). Inside lights are ashing red and green
alerting the forklift operator the trailer is secured by other
means. Outside light is ashing red alerting the truck driver
not to move.
To return to STORED, press the HORN OVERRIDE button
followed by the UNLOCK button.
OUTSIDE LIGHT
STATUS
CONTROL BOX
STATUS
RESTRAINT POSITION
Outside Lights
Inside Lights
RED
GREEN
OUTSIDE LIGHTS
Checkoutside lights when
bothLEDs are o.
UNLOCK
LOCK
HORN OVERRIDE
DOK-LOK
®
DO NOT ENTER TRAILER
ENTER TRAILER
Visually inspect before loading/
unloading vehicle. DOK-LOK
hook must secure rear impact
guard. See warnings on side
panel.
Additional warning labels,
manuals and other information
are available by calling:
1-800-456-0600
If red light is on and/or horn
sounds, DOK-LOK is not
properly engaged.
Check operation of DOK-LOK.
Vehiclemay not be against dock.
R.I.G. may not be compatible.
Hook travel may be obstructed.
Before using "HORN OVERRIDE,"
secure vehicle by other means.
FIGURE 8 - HORN OVERRIDE STATE
Before operating “HORN OVERRIDE”, secure trailer
by other means.

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
Pub. No. 1168 - August 2016 13
MAINTENANCE
When working with electrical or electronic controls,
make sure that the power source has been locked
out and tagged according to OSHA regulations and
approved local electrical codes.
Post safety warnings and barricade work area, at dock
level and at ground level, to prevent unauthorized
use of the dock position.
A safe work place requires all lights and the horn to
be working properly. DO NOT use DOK-LOK vehicle
restraint if parts are broken or missing.
Maintenance may be required more frequently at
loading docks exposed to harsh environments
(extreme climates, corrosive chemicals, frequency
of usage, etc.). Consult Rite-Hite if these conditions
exist for accelerated maintenance requirements.
NOTE: If a leveler is installed at the VBR DOK-LOK
vehicle restraint location, it may be necessary to
raise the leveler before performing maintenance.
Raise the leveler, insert and secure the
SAFE-T-STRUT, and LOCKOUT/TAGOUT the
power source.
NOTE: Your local Rite-Hite representative provides a
Planned Maintenance Program (P.M.P.) which can
be tted to your specic operation. Call your local
representative.
DAILY
1. Remove debris around VBR-300 DOK-LOK vehicle
restraint.
2. Verify inside, outside lights and horn are working.
3. Replace damaged or missing light bulbs and lenses.
4. Repair, remount, or replace outside and inside signs
as required.
5. Inspect dock bumpers. Four inches (4”) of protection is
required. Worn, torn, loose or missing bumpers must
be replaced.
180 Days
1. Perform all Daily maintenance.
2. Grease rollers at tting located on the barrier.
Use Mobilith SHC220 No. 2 grease (or equivalent
temperature range lithium based grease). Seven
(7) to eight (8) pumps should be used for rst 180
Day maintenance. Two (2) to three (3) pumps at
subsequent 180 Day maintenance intervals.
FIGURE 9 - MAINTENANCE AND LUBRICATION
3. Inspect hydraulic hoses and power unit for signs of
leakage. Check oil uid level.
4. Inspect outside junction and light box. They should be
rigidly mounted. If loose or damaged, inspect all wires
and wire connections.
5. Check that all concrete anchor bolts are torqued to
60 ft-lbs.
6. Inspect switch wires from vehicle restraint to junction
box. Look for kinks, crushed areas, etc.
7. Perform operational test after all maintenance repairs
and adjustments are complete.

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
14 Pub. No. 1168 - August 2016
Problem Probable Cause Solution
1. DOK-LOK barrier does not raise/
lower.
a. Debris in roller track/base.
b. Defective gas spring.
c. Rollers need lubrication.
a. Clean debris from roller track and base.
b. Check if gas spring has enough force to
lift the barrier.
c. Lubricate barrier rollers.
2. DOK-LOK barrier drops causing
lights to change and/or horn to
sound while trailer is being serviced.
a. Defective gas spring. a. Check if gas spring has enough force to
keep barrier in contact with R.I.G.
3. DOK-LOK lights are out. a. Bulbs burnt out, loose or missing
c. Incorrect wiring.
d. Power source malfunction.
a. Check all bulbs and replace as
required.
c. Verify wiring per Electrical Schematic.
d. Check power source including building
circuit breaker and 1A fuse on power
module.
Gas spring should continue
to lift the barrier once the
barrier reaches this position.
Note: If barrier does not raise
see problem #1 in the
troubleshooting section.
FIGURE 10 - GAS SPRING VERIFICATION
TROUBLESHOOTING
GENERAL DIAGNOSTIC INFORMATION VBR-300ALP

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
Pub. No. 1168 - August 2016 15
LED STATUS CHART

MICROCONTROLBOARD POWERBOARD
VBR‐300MANUA
L
INPUTS OUTPUTS OUTPUTS
VERTICALBARRIERRESTRAINT FIELD PUSHBUTTONS 12VDC RELAY 115/230VA
C
DOK‐LOKLIMITSWITCH1[SW1]
DOK‐LOKLIMITSWITCH2[SW2]
UNLOCKINTERLOCK[UNLKITL]
LOCKPUSHBUTTON
UNLOCKPUSHBUTTON
HORNSILENCEPUSHBUTTON
INSIDEREDLIGHT[ISR]
INSIDEGREENLIGHT[ISG]
CORNER‐VUREDLIGHT[CVURD]
CORNER‐VUGREENLIGHT[CVUGRN]
LEVELER‐VUREDLIGHT[LVURD]
LEVELER‐VUGREENLIGHT[L‐VUGRN]
OUTSIDEREDLIGHT[OSR]
OUTSIDEGREENLIGHT[OSG]
DOK‐LOKHORN[HORN]
K1‐GREENLIGHTINTERLOCK
K2‐SECURITYSYSTEMINTERFACE
[IFEQUIPPED]
MOTOROUPTUT#1[M1/LOCK]
MOTOROUPTUT#2(M2/UNLOCK)
12VDCPOWERSUPPLYOK
TERMINALBLOCKNO. J13.1 J13.2 J14.3 MEMBRANE J7.16 J7.17 J12.1 J12.2 J12.3 J12.4 J11.2 J11.1 J7.19 J9.3 J10.3 J5.4 J5.3 J2.1‐6 POWERBOARDLEDs
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐LD2LD1LD7
MICROCONTROLBOARDLEDs LD20 LD23 LD30 LD52 LD17 LD19 LD11 LD13 LD18 LD12 LD49 LD48 LD15 LD9 LD10 LD1 LD3 ‐
01.01.00 LOCKEDSTATE
N/A??M‐ ‐FPFPFPPFFTFFFT
01.02.00 UNLOCKEDSTATE
N/AF?‐M‐PFPFPFFPFFFFFT
01.09.00 SECUREVEHICLETRANSITIONSTATE
N/A??‐ ‐ ‐PFPFPFPFFFFFFT
01.09.01 SECUREVEHICLEITCTRANSITIONSTATE
N/AT?‐ ‐ ‐PFPFPFPFFFFFFT
NO. STATE/SEQUENCENO.
KE
Y
?‐VARYSDEPENDINGONOPERATION K‐CONTINUOUSCHIRP A‐ALTERNATING M‐LIGHTSWHENBUTTONPRESSED F‐OFF P‐PULSING/FLASHING[SETTOSTEADYUSINGDIPSWITCHES] ITL‐INTERLOCKINPUTON T‐STEADYON MOTOROVERLOADRESETPROCEDURE IfYellowLEDLD50isilluminatedandtheDok‐LokHornisChirping,systemisinanOverloadFaultState. Toresetthemotoroverload: 1)PressandHoldHornSilenceButton(3‐ButtonSystem)untilHornChirps(Approximately5Seconds).OR 2)PressandReleaseRestraintO/LButtononMicroControllerBoard. Whenthemotoroverloadhasbeenreset,theYellowLD50LEDwillturnoffandnormaloperationresumes. IfDok‐Lokmotorstilldoesnotrunafterresetttingtheoverload,checkMotorFuse10FU1.
VBR3ALP

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
16 Pub. No. 1168 - August 2016
ELECTRICAL SCHEMATIC
DENOTES WIRE NUT
CONNECTION
DENOTES FIELD WIRES
1FU
1.5A FUSE
2FU
1.5A FUSE
TRANSFORMER
TO CUSTOMER POWER SUPPLY
AND SAFETY DISCONNECT
115 V.,1 PH., 60 Hz. 15 A.
WHITE
BLACK N
L1
1L1
G
Fl VR1
117 V.
RED
RED RED
REDRED
RED
RED (RED) (WHITE)
(RED) (WHITE)
(RED) (WHITE)
(RED) (WHITE)
RED
INSIDE
R
INSIDE
G
OUTSIDE
G
OUTSIDE
RX2
X2
5
6
6
4
2
3
1
1
X1
2
X3 5
"SECURE
TRAILER"
"ENTER"DO NOT
ENTER"
10 V. (X1) 5 V. (X3) (X2)
C
C1
FIGURE 11 - ELECTRICAL SCHEMATIC

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
Pub. No. 1168 - August 2016 17
NOTE:
1. ITC LIMIT SWITCH POSITION REFERENCES:
POSITION 1 - OVERHEAD DOOR OPEN/MECHANICAL LEVELER RAISED
POSITION 2 - OVERHEAD DOOR CLOSED/MECHANICAL LEVELER STORED
TO CUSTOMER POWER SUPPLY
AND SAFETY DISCONNECT
115 V., 1PH., 60Hz. 15A.
DENOTES WIRE NUT
CONNECTION
DENOTES FIELD WIRES
TRANSFORMER
2FU
1.5A
1FU
1.5A
ITC LIMIT
SWITCH
(RED) (WHITE)
(RED) (WHITE)
(RED) (WHITE)
(RED) (WHITE)
R
INSIDE
G
G
OUTSIDE
R
INSIDE
OUTSIDE
X2
X2
RED
RED
5
6
6
4
RED 1
1
3
2
(4) (2)
UP
DOWN
(3) (1)
1
X2
(X2)
X3
X1 RED
5 V.
10 V.
"SECURE
TRAILER"
"ENTER""DO NOT
ENTER"
X1
2
X3
5
RED
RED
1L1
C1 FL
L1
VR1
117 V.
NG
BLACK
WHITEBLACK
FIGURE 12 - ELECTRICAL SCHEMATIC (OPTIONAL)

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
18 Pub. No. 1168 - August 2016
ELECTRICAL SCHEMATIC
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
FROM CUSTOMER MAIN POWER & SAFETY
PROTECTION DEVICE.
110-120v. 1PH. 60HZ./208-240v. 1PH. 50HZ.
USE 10.0A/5.0A DUAL ELEMENT TIME DELAY FUSE
(1L1)
(N)
(1L1)
(N)
DUMMY
L1
SEE NOTE 2
FUSED DISCONNECT
(BY OTHERS)
N
G
1FU1 1L1
N
SEE NOTE 7
LD2
LD1
LD9
LD8
LD7
LD10
K3
K2
K1
J3
J5
J7
J2
J11
M2
RSOL1
RSOL2
RSOL3
M1
+12VDC
POWER CIRCUIT BOARD
SEE DETAIL - "A"
10FU1
MOTOR
12FU1
SOLENOID
11FU1
PWR SUPPLY
J2
12V
(12V)
(12V)
(12V)
(12V)
(12V)
X1/L1
X2/N
M1
M2
MCOM
SCOM
12VDC
12VDC
12VDC
12VDC
12VDC
12VDC
RSOL1
RSOL2
RSOL3
J7-3
J7-2
J7-1
J2-6
J2-5
J2-4
J2-3
J2-2
J2-1
J3-2
J3-1
J5-4
J5-3
J5-2
J5-1
FIGURE 13 - ELECTICAL SCHEMATIC - SECTION 1

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
Pub. No. 1168 - August 2016 19
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
LD10
SCTY INTFC
CR2
TO SECURITY
SYSTEM INTFC
(IF EQUIPPED)
(UNLK ITL/J43)
LEVELER STORED
UNLOCK INTERLOCK
CIRCUIT
(COM)
(AUTO ITC/J166)
OVERHEAD DOOR
CLOSED
(HORN OVRD/J164)
(CTRL PWR/J163)
(OSLT ITC/J162)
(ISLT ITC/J161)
(COM)
(COM)
(COM)
(COM)
(COM)
INSIDE
LIGHT ITC
OUTSIDE
LIGHT ITC
CONTROL
POWER ENABLE
HORN OVERRIDE
ENABLE
AUTO ITC
(COM)
(COM)
MECH/FA ITC PHOTOEYE ITC
OUTSIDE LT ITC
INSIDE LT ITC
J2
J7
U1
VR1
J16
J17 J3J4
TERM1
J1
J12
J15
J11
J5 JP2
UN-LK PB LK PB
PB1 PB2
PB3
E-STOP LOWER PB LIP-OUT PB
ISR
ISG
RAISE PB
CR1
LK
SOL2
SPARE
UNLK
PB PRESS
OVLD LOK
INSLT ITC
OSLT ITC
CTRL PWR
KYD HRN OVRD
UD ITC IN
AUTO ITC
OSR
OSG
PED-VU AMB
PED-VU ALRM
LVLR-VU GRN
LVLR-VU RD
CRNR-VU GRN
CRNR-VU RED
GLT ITL
MWL ALARM
MWL ACTR
LVLR CONTR
SOL3
UNIDOX ITC
HORN
JP1 JP3
TERM 2
J8
OUTSIDE LIGHTS
12VDC
R(RD)
135mA
(WH)
G(RD)
135mA
(WH)
LD7
J2
+12VDC
DETAIL - "A"
(42/12V)
COM
COM
RESTRAINT POWER CKT BD
(LOWER RIGHT CORNER )
N.C.
N.O.
COM
N.C.
N.O.
COM
CR2
H
INSIDE HORN
12V, 0.03A
1234 567
12VDC
12VDC
12VDC
12VDC
12VDC
12VDC
SEE DETAIL - "C"
(40/OSR)
(41/OSG)
(42/12V)
K1/K2 SPECS:
250V AC/30VDC RES. LOAD, 1A MAX
LD24
LD26
LD28 LD27
LD25
LD31
LD33
LD34
LD17
LD19
LD9
LD1
LD2
LD6
LD4
LD3
LD50
LD52
LD36
LD15
LD16
LD14
LD12
LD18
LD13
LD11
LD39
LD20
LD40
LD37
LD42
LD48
LD10
LD49
LD46
LD44
LD43
LD41
LD38
OSG
OSR
LVLR CNTR
MWL ACTR
MWL ALM
UD ITC OUT
GLT ITL
CVU RD
CVU GN
LVU RD
LVU GN
PVU ALM
PVU LT
AUTO ITC
UD ITC IN
KYD HORN OVRD
CTRL PWR
OSLT ITC
ISLT ITC
LD35
μSD
MICRO CONTROL
CIRCUIT BOARD
HORN+ (WH/RD)
HORN- (WH/BK)
HORN- (WH/BK)
OUTSIDE LT
CIRCUIT
LED LIGHTS ONLY
K1
K2
12V(BL)
J155(BL)
12V(BL)
12V(BL)
SSR1
(A2) (A1)
12VDC, 0.1W
TO LED BOARD
(SEE DETAIL - "B")
J13
J14
SW1
SW2
PED-VU EN
PED-VU DET
OHD ITL
UNLK ITL
ARTD
SOL1SPARE
LD23
LD21
LD22
LD30
LD29
LD32
LD20
LD7LD8
COM
ARTD
UNLK ITL
OHD ITL
COM
COM
COM
PVU DET
PVU EN
SW2
SW1
DIAG
SW2
SW6
RES O/L
RESET
(COM)
(SW1)
(SW2)
LOCK
CIRCUIT
(COM)
UNLOCK
CIRCUIT
"STORED" SENSOR (SW2)
N.O.H.C.
(WH) (BK)
G
"RIG" SENSOR (SW1)
N.O.
(WH) (BK)
G
(COM)
J16-1
J16-2
J16-3
J16-4
J16-5
J16-6
J17-1
J17-2
J12-6
J12-5
J12-4
J12-3
J12-2
J12-1
J15-5
J15-4
J15-3
J15-2
J15-1
A
C
B
A
C
B
J11-2
J11-1
J2-6
J2-5
J2-4
J2-3
J2-2
J2-1
J13-1
J13-2
J13-3
J13-4
J13-5
J13-6
J14-1
J14-2
J14-3
J14-4
J14-5
8
GLT ITL
GREEN LIGHT
INTERLOCK
(IF EQUIPPED
(SEE DETAIL D)
GLT ITLGLT ITLGLT ITL
PB
HYD. ITC
SS
HORN OVERRIDE
SS
CONTROL POWER
DOK-GUARDIAN ENG
(OPTIONAL EQUIPMENT - REMOVE
FACTORY JUMPER WHEN INSTALLING)
OPTIONAL EQUIPMENT:
COMPETITIVE LEVELER INTERLOCK
(OPTIONAL EQUIPMENT)
FACTORY JUMPER:
(18GA WH/BL)
FIGURE 14 - ELECTICAL SCHEMATIC - SECTION 2

RITE-HITE®VBR-300MNL DOK-LOK®Owner’s Manual
20 Pub. No. 1168 - August 2016
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
J7 DescriptionJ1Description
1USART2_RX1MICROPCB_RXBLUE
2USART2_TX2MICROPCB_TXGRAY
3
4
5
6
7
8
9
10
11
12
13 12V [Vext] 512V [Vext] RED
14 OSG INDICATOR9 OSG INDICATORWHITE/GREEN
15 OSR INDICATOR10OSR INDICATORWHITE/ORANGE
16 ISR8ISRORANGE
17 ISG7ISGGREEN
18
19 HORN [-
]W
HITE/BLACK
20 GND4DIGITAL GNDWHITE/BLUE
21 RESERVED 6RESERVEDBLACK
22 USART2_RTS 3MICROPCB_RTSWHITE
23 12V [HORN +] WHITE/RED
24
System Control Harness - MEMBRANE
uControl Board
LED Board
Wire Color
1
U4
J1
D64
D63
5
1
INSD
10
6
1
1
J4
J3
DETAIL B - BACK OF COVER
OSLT RED
SYSTEM
CONTROL
HARNESS
(FROM MICRO PCB)
RIBBON CABLES
(FROM MEMBRANE LABEL)
RESET
OSLT GREEN
DETAIL - "C" MICRO CONTROL BOARD DIP SWITCH SETTINGS
FLASH
UP:
SW3
LIGHTS
DOWN:
STEADY
1234 56 78
DETAIL - "D" GREEN LIGHT INTERLOCK VARIATIONS
LEGEND:
DENOTES WIRE CONNECTIONS THRU TERMINAL BLOCK.
DENOTES FIELD WIRES.
DENOTES WIRE NUT CONNECTION.
DENOTES MALE/FEMALE PLUG CONNECTOR.
GREEN
DIP
SWITCH
FACTORY
SETTING OPTION/FUNCTION
1DOWNFACTORY USE
2DOWNINSIDE RED LIGHT
3DOWNINSIDE GREEN LIGHT
4UPCORNER & LEVELER-VU RED
5UPCORNER & LEVELER-VU GREEN
6DOWNOUTSIDE LIGHTS - RED/GREEN
7UPPEDESTRIAN-VU
UP CODED HORN OVERRIDE
DOWN STANDARD HORN OVERRIDE
8
PB
"RAISE"
FROM LEVELER POWER
OR CONTROL VOLTAGE
TO LEVELER MOTOR
OR CONTACTOR
( 1/L1 )( 2/T2 )
SSR1-1
LEVELER
CONTROL BOX
(PIT LEVELER)
LEVELER
CONTROL BOX
(VERT LEVELER)
OVERHEAD DOOR
CONTROLLER
(BY OTHERS)
COMPETITIVE LEVELER
CONTROL BOX
(OPTIONAL EQUIPMENT)
"RAISE" MOTOR STARTER
"LOWER" MOTOR STARTER
"OPEN"
(CONTROL VOLTAGE)
(CONTROL VOLTAGE)
(CONTROL VOLTAGE)
(OPEN CONTACT)
1. INSTALL PER LOCAL ELECTRICAL CODES. REFER ALL INSTALLATION AND
SERVICE TO QUALIFIED PERSONNEL.
2. ALL INCOMING POWER (FROM DISCONNECT TO CONTROL BOX) AND
MOTOR FIELD WIRING TO BE MINIMUM #14GA. 60°/75°C COPPER
WIRE, INSULATED SUFFICIENTLY FOR INCOMING VOLTAGE.
3. ALL CONTROL FIELD WIRING TO BE MINIMUM #14GA. 60°/75°C
COPPER WIRE ONLY, INSULATED SUFFICIENTLY FOR INCOMING VOLTAGE.
4. ALL INTERNAL WIRING TO BE #14GA. MINIMUM FOR POWER CIRCUITS AND
CIRCUIT BOARD POWER,
#16GA MINIMUM FOR CONTROL CIRCUITS, 90°C,
RED COPPER WIRE UNLESS
OTHERWISE NOTED, INSULATED SUFFICIENTLY
FOR INCOMING VOLTAGE.
5. TORQUE REQUIREMENTS:
-PCB TERMINAL BLOCK POWER (J3/J5): 7.0 LB-IN
-PCB TERMINAL BLOCK ALL OTHER: 4.0 LB-IN
-GROUND TERMINAL: 35 LB-IN
6. LS1 & LS2 PROVIDED BY RITE-HITE WITH VEHICLE RESTRAINT.
OTHER FIELD DEVICES ARE OPTIONAL. SEE SPECIFIC ELECTRICAL SCHEMATIC.
7. FUSED DISCONNECT NOTES:
-FUSED DISCONNECT IS NOT PROVIDED BY RITE-HITE PRODUCTS
CORPORATION. DISCONNECT MUST BE PROVIDED BY OTHERS AND
INSTALLED PER LATEST EDITION OF UL508A AND NEC REQUIREMENTS.
-A BRANCH CIRCUIT DISCONNECT SHALL BE LOCATED WITHIN A 50 FT.
RADUIS AND BE VISIBLE FROM THE CONTROL BOX LOCATION.
[REFERENCE LATEST EDITION OF NEC, SECTION 430]
8. CLASS 1 CONTROL CIRCUIT.
FIGURE 15 - ELECTICAL SCHEMATIC - SECTION 3