RITE-HITE Wheel-Lok GWL-2300 User manual

GWL-2300 Wheel-LokTM
Vehicle Restraint
Installation Manual
This Manual Covers Restraints Built After Serial Numbers:
GW231001 and up
PRINTED IN U.S.A.
RITE-HITE PRINT SHOP
PUBLICATION NO. 1203
NOVEMBER 2008
MADE IN U.S.A.

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RITE-HITE®GWL-2300 Installation Manual
TABLE OF CONTENTS
NOTICE TO USER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY WARNINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BACK COVER
NOTICE TO USER
Your local RITE-HITE®representative provides a Planned Maintenance Program (P.M.P.) which can be fitted to your
specific operation. Call your local representative or the RITE-HITE®Corporation at 414-355-2600.
The RITE-HITE®products in this manual are covered by one or more of the following U.S. patents: 4,865,507;
4,920,598; 4,995,130; 5,040,258; 5,271,183; 5,323,503; 5,375,965; 5,440,772; 5,442,825; 5,531,557; 5,546,623;
5,553,987; 5,582,498; 5,664,930; 5,702,223; 5,762,459 (RE: 37,570); 5,882,167; 5,964,572; 6,010,297; 6,052,268;
6,065,172; 6,070,283; 6,074,157; 6,085,375; 6,092,970; 6,106,212; 6,116,839; 6,190,109; 6,220,809; 6,627,016;
6,238,163; 6,311,352; 6,318,947; 6,322,310; 6,360,394; 6,368,043; 6,431,819; 6,488,464; 6,497,076; 6,499,169;
6,505,713; 6,524,053; 6,634,049; 6,654,976; 6,676,360; 6,726,432; 6,773,221; 6,832,403; 6,880,301; 7,032,267;
7,062,814; 7,134,159; 7,213,285; 7,216,391 and pending U.S and foreign patent applications.
RITE-HITE®, LEVEL-RITE®, THINMANTM, SAFE-T-LIP®, HYDRACHEK®, WHEEL-LOKTM, DOK-LOK®, DUAL-DOK®,
SAFE-T-STRUTTM, DOK-COMMANDER®, JUMBOTM, HYDRA-RITETM, SAFE-T-GATE®, and SMOOTH TRANSITION
DOK SYSTEMTM, are trademarks of RITE-HITE®Corporation.

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RITE-HITE®GWL-2300 Installation Manual
SAFETY WARNING
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.
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.
This is the highest level statement. Failure to
follow the listed instructions will most likely
result in severe injury or death.
IMPORTANT is used to draw attention
to a procedure that needs to be followed to
prevent machine or property damage.
This is a statement of serious hazard. Failure to
follow the listed instructions could place the
individual at risk of serious 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.

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RITE-HITE®GWL-2300 Installation Manual
INSTALLATION INSTRUCTIONS
The performance of any machine can be no better than
the installation and application. The GWL-2300 vehicle
restraint requires only ordinary application and
installation skills using good workmanship and quality
materials.
Follow the 8-step Installation Procedure:
1. Inspect components.
2. Install frame assembly.
3. Install wheel guides.
4. Install barrier ramp.
5. Install electrical components and signs.
6. Fill and bleed hydraulic system.
7. Test operation.
8. Install springs and spring retention hardware.
INSPECT COMPONENTS
Open and inspect all materials. Immediately report any
damage or material shortage. Study component
assemblies and determine their proper locations.
GWL-2300 VEHICLE RESTRAINT POWER
SOURCE
On occasion, the incoming electrical power for the
GWL-2300 vehicle restraint is taken from a convenient
nearby electrical appliance, i.e., overhead door opener.
Generally, there is no problem using this sort of power
source; you must, however, verify that the amperage is
in accordance with local and federal codes.
The GWL-2300 vehicle restraint requires 120V, single
phase 60 Hz power and 5 amps of current. Four (4)
GWL-2300 vehicle restraints can be hooked into one (1)
20 amp feeder circuit per the current N.E.C. Paragraph
#430-53.
WHEN IN DOUBT, CALL YOUR LOCAL RITE-HITE
REPRESENTATIVE OR RITE-HITE AT [phone].
Post safety warnings and barricade work area,
at dock level and at ground level, to prevent
unauthorized use of the dock position. 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.
All components must be connected to a
SAFETY EARTH GROUND where indicated. The
SAFETY EARTH GROUND must conform to the
current National Electric Code Section 250-81
section (a) or section (c) for a grounding
electrode system.

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RITE-HITE®GWL-2300 Installation Manual
INSTALLATION INSTRUCTIONS CONT.
CONCRETE APPROACH REQUIREMENTS
Verify the approach meets the following criteria:
1. The approach must be concrete, 148" wide by 300"
long x 6" minimum thickness. See Figure 1.
2. The approach must be free of discontinuities (such
as cracks, potholes, etc.) greater than 1/4" where
the trigger will travel. In addition, the trigger must
not travel more than 1" below the base plate of the
frame assembly without surface preparation under
trigger path. See Figure 2, Section A-A.
3. The GWL-2300 vehicle restraint can be installed
and shimmed up to 1" without modification. If
greater than 1" of shimming is necessary, longer
anchors and trigger bridge plate will be required.
Please consult RITE-HITE.
TRENCH DRAINS
1. If the GWL-2300 vehicle restraint crosses a trench
drain parallel to the dock face, the drain grate must
be bridged with a 1/4" thick steel plate where the
trigger will travel.
2. If the trench drain lies in the same position as a
GWL-2300 vehicle restraint anchor plate, a steel
plate must be welded to the mounting pad and
anchored to the approach. See Figure 2.
148"
300"
Dock
Face 67"
C
L
81"
FIGURE 1 - CONCRETE PAD
Never weld on the GWL-2300 vehicle restraint
when the electrical components are connected
to the main control box and the power to the
box is “ON”. Electrical current from the welder
can “FEED BACK” through the circuit and
could cause injury or damage electrical
components.

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RITE-HITE®GWL-2300 Installation Manual
Rearmost
Trench Drain
Position
Bridge Plate
For Trigger
Travel Path
If Necessary.
Anchor And
Weld In-place
1/4 " Typ.
16"
11-1/2"
Bridge Plate For
Trench Drains 1/4" Plate
Steel. Plate Width Must
Be 1/2" Wider Than
Mounting Plate To Allow
For Welding. Plate
Length Determined By
Location And Width
Of Drain.
C
L
55"
Ref.
C
L
Approach
Bumper Face
A
A
Shim Middle Frame Bar
Full Depth To Approach
17-1/2" To
Front Of Rear
Base Plate
Rearmost
Trench Drain Position
Frontmost
Trench Drain Position
Trigger
Travel Path
Locate Anchor Tabs Away From
Trigger Travel Path. Anchor
Mounting Holes Must Be A Minimum
3" From Edge Of Trench Drain.
Locate Anchor Mounting Tabs On Both Sides Of Trench Drain
If Welding To GWL-2300 Mounting Plate Is Not Possible.
Shim Material Is Required If Welding
To GWL-2300 Frame Bar Plate
Section A-A
Side View
Top View
1" Max.
Allowable
Trigger
Approach
Shims
1/4 " Typ.
Frontmost
Trench Drain
Position
Tube And I-Beam
Must Remain Parallel
Bevel Plate
Edges To Prevent
Roller Damage
Assembly
Level frame over
each base plate
FIGURE 2 — INSTALLATION OVER A TRENCH DRAIN AND SHIMMING
A maximum shimming of 1" thickness is
permitted for installations of the GWL-2300.
Make sure that solid metal shims are used.
Shims must fully support the mounting plate
and are secured in place with the mounting
anchors. Use the holes in the mounting plate
as a drilling guide. Consult RITE-HITE
Applications where more than 1" of shimming
is required.
INSTALLATION OVER A TRENCH DRAIN AND SHIMMING INSTRUCTIONS
INSTALLATION INSTRUCTIONS CONT.

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RITE-HITE®GWL-2300 Installation Manual
INSTALLATION INSTRUCTIONS CONT.
LOCATE THE CENTERLINE
1. Secure a 20' length of string at the lower right edge
of the dock leveler pit at the dock face. Measure out
5' of string, and holding a piece of chalk at the end
of the 5' length of string, draw a large arc which
begins well before and extends past where you
expect the centerline to be. See Figure 3.
2. Repeat Step 1, this time beginning at the lower left
edge of the dock leveler pit at the dock face. Where
the two arcs intersect indicates one point of the
centerline.
3. Repeat Steps 1 and 2, using 20' of string instead of
5'. Use the intersections of both arcs as points to
snap a chalk line. This line is the centerline (Line A)
for the frame assembly.
LOCATE FRAME POSITION
1. Measure to the right of the centerline 52-1/2". Snap
a chalk line for Line B. To ensure Line B is parallel
to the centerline (Line A), measure and mark at
several locations. See Figure 3.
2. Measure 17-1/2" off each bumper face. Snap a
chalk line for Line C. See Figure 3.
POSITION FRAME
1. Remove side covers from frame assembly prior to
positioning and anchoring.
2. Position the GWL-2300 vehicle restraint along the B
and C lines as shown in Figure 4. The front edge of
the rear mounting plate should be aligned with Line
C. The edge of the front and rear base plate should
be aligned with Line B. See Figure 4.
SHIM AND ANCHOR FRAME
1. Starting at one end of the frame assembly, see
Figure 2 for shimming instructions, drill anchor holes
using mounting plates as templates. Insert anchor
bolts, tapping each into the drilled holes with a
hammer so that the head of the anchor is as close
to the anchor plate as possible without causing the
frame to twist.
2. After all concrete anchors have been inserted, using
a torque wrench, tighten each to 100 ft-lbs of
torque. Verify that dimension between top of I-beam
and tube is consistent, and frame stays level above
each base plate. See Figure 2.
20 Feet 20 Feet
5 Feet
Line C
5 Feet
17-1/2"
Loading Dock
52-1/2"
C
L
FIGURE 3 - LOCATING CENTERLINE
103"
Line C
55"
Ref.
Protective
Wheel Guide
(Optional)
52-1/2" 40"
12"
Loading Dock
C
L
52"
17-1/2"
283"
Ref.
127"
Ref.
10-1/4"
FIGURE 4 - ANCHORING TRACK

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RITE-HITE®GWL-2300 Installation Manual
INSTALLATION INSTRUCTIONS CONT.
INSTALL WHEEL GUIDES
NOTE
If there is another loading dock on the right side of the
GWL-2300 vehicle restraint installation and this position
does not have wheel guides, it is required to install a
protective wheel guide. See Figure 4.
1. Measure 10-1/4" off the stored end mounting plate
and snap a chalk line.
2. Measure 52" off the centerline to the right, 51" left
and snap a chalk line.
3. Position short wheel guide (GWL-2300 vehicle
restraint side) so nearest mounting plate is 10-1/4"
from GWL-2300 vehicle restraint mounting plate
and inside edge of guide tube is 52" from the
centerline. See Figure 4.
4. Position long wheel guide so front most mounting
plate is aligned with the front most mounting plate
of the short wheel guide and so that the inside
edge of the guide tube is 51" from the centerline.
See Figure 4.
5. Measure and verify that there is 103" between
wheel guides. Adjust as required and anchor to
approach.
6. Insert concrete anchors and tighten, using a torque
wrench, to 100 ft-lbs.
INSTALL BARRIER RAMP
1. Position ramp at outer edge of barrier as shown in
Figure 5.
2. Verify locking arm clearance by manually lowering
and raising the locking arm weldment in and out of
the ramp. Use the maintenance strut located on
the inside of the rear side cover.
3. Insert (4) concrete anchors and torque to 100 ft-
lbs.
LOCKING RANGE
These instructions are intended for ALL DOCK
PERSONNEL who are involved in loading/unloading
trucks and trailers. GWL-2300 vehicle restraint is a
safety system used to accommodate trucks and trailers
with tire diameters ranging from 30" to 44", while the
rear axle is located at a maximum of 158" away from
the face of the loading dock. See Figure 6.
10-1/4"
Wheel Guide
Location
Flush
13-1/4"
Ref.
7 "
Ramp Location
FIGURE 5 - INSTALLING BARRIER RAMP
AND FRONT WHEEL GUIDE
Max.
158"
Min.
43"
FIGURE 6 - WHEEL POSITION RANGE
The locking arm is heavy. Lift it, using the
supplied strut (located on the inside of the rear
side cover), to the required position by fully
inserting the strut into the tube and then
moving the locking arm upwards in one motion.
Lift carefully and stand clear to avoid pinching
fingers or feet. Lifting by hand may cause back
injury. Secure the arm in the elevated position
against unintentional movements.
Always check that the vehicle is parked firm
against the bumpers before locking the
GWL-2300 vehicle restraint.

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RITE-HITE®GWL-2300 Installation Manual
INSTALLATION INSTRUCTIONS CONT.
If the incoming electrical power for the GWL-2300
vehicle restraint is taken from a nearby electrical
appliance, i.e., overhead door opener, verify that the
amperage is in accordance with local and federal
codes.
The GWL-2300 vehicle restraint requires 120V,
single phase 60 Hz power and 5 amps of current.
Four (4) GWL vehicle restraints can be hooked into
one (1) 20 amp feeder circuit per the current N.E.C.
Paragraph #430-53.
When in doubt, call your RITE-HITE representative
or RITE-HITE at [phone].
The GWL-2300 vehicle restraint assembly includes
the control box with lights, outside power unit box
and the outside signal light box. The outside
junction box, conduit fittings and wire are provided
by others. Quality material and workmanship should
be used. Refer to Figure 7 for component location
information. Refer to electrical schematics found
inside the control box for wiring information.
80"
1"
22"
96"
Junction Box Outside
Of Dock Bumpers
C
LLoading Dock
Control Box
48"
18"
15"
Approach
Some Docks May Have Truck Seals (Or Shelters)
Installed Or Planned Which Are Larger Than
Standard. Outside Light And Sign Location
Mounting Should Be Studied Before Proceeding
To Avoid Interference.
Outside Light Box
Reverse Letters
Caution Sign
Caution Sign
Interior Caution Sign
Door Opening
(Reference)
Outside Edge Of Shelter
(If Equipped)
View From Outside Of Loading Dock
Junction Box NEMA 4 J.I.C., Size Per Current N.E.C. Section 370.16.
NOTE: Projection Of Box Not To Exceed 3-1/ 2".
FIGURE 7 - ELECTRICAL INSTALLATION AND SIGN LAYOUT
All components must be connected to a
SAFETY EARTH GROUND where indicated. The
SAFETY EARTH GROUND must conform to the
1999 National Electric Code Section 250-50
section (a) or section (c) for a grounding
electrode system.
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.
INSTALL ELECTRICAL COMPONENTS AND SIGNS

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RITE-HITE®GWL-2300 Installation Manual
INSTALLATION INSTRUCTIONS CONT.
1. Using the maintenance strut, position the locking
arm assembly to a “locked” (up) position. Seperate
the locking arm trolley and trigger trolley manually
to simulate a truck is at the dock. See figure 8.
2. Fill hydraulic reservoir using the supplied (MIL-H-
5606) hydraulic fluid.
3. Press and hold the diagnostic button inside the
control box until the horn chirps.
4. Once horn chirps enter code 1-1-1-1 by using the
buttons on the face of the control box. Controls are
now in FILL mode. Holding the LOCK and
UNLOCK button will run the pump forward and
reverse.
5. Cycle the vehicle restraint to remove air from the
system. Add remaining hydraulic fluid. Stop cycling
once the cylinder extends and retracts without
hesitation.
6. Press diagnostic button inside control box to exit
FILL mode.
The GWL-2300 vehicle restraint is now ready for the
initial test procedure, which must be carried out prior to
use of the device.
1. Using the maintenance strut, position the locking
arm assembly to a “locked” (up) position. Seperate
the locking arm trolley and trigger trolley manually
to simulate a truck is at the dock. See figure 8.
2. Initial Operation Test.
a. To lock a vehicle, the LOCK button must be
pressed momentarily. The outside light will change
instantly from flashing GREEN to flashing RED.
The inside light will remain steady RED until the
locking mechanism is engaged properly. Once it is
engaged, the inside light will change to flashing
GREEN.
b. To unlock a vehicle, the UNLOCK button must
be pressed momentarily. The inside light will turn
instantly to steady RED, while the outside light
remains flashing RED until the locking mechanism
is disengaged. The outside light will turn to flashing
GREEN once the locking mechanism is properly
dis-engaged.
Make sure that electrical schematics are in the control
box and that the working area is clean and free of any
packaging material.
Post safety warnings and barricade work area,
at dock level and at ground level, to prevent
unauthorized use of the dock position.
If light sequence differs from what is described
above, check the electrical installation. If the
situation can not be resolved, call RITE-HITE for
assistance. NEVER leave the job site with the
GWL-2300 vehicle restraint not working
properly. Store the locking arm in its rest
position before you leave the site.
Stand clear when you push the locking arm to
its stored position. The arm should only be
moved by hand for the initial installation and
test procedure by authorized and trained
personnel. NEVER leave the arm in the elevated
position.
Engage Locking Arm Assembly With Service Strut
Service
Strut
Locked Position With Trolleys Seperated
FIGURE 8 - POSITION LOCKING ARM ASSEMBLY
TEST OPERATIONFILL AND BLEED HYDRUALIC SYSTEM

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RITE-HITE®GWL-2300 Installation Manual
INSTALLATION INSTRUCTIONS CONT.
1. Install springs. See Figure 9.
2. Install retention hardware. See Figure 9.
The GWL-2300 vehicle restraint should now be installed
properly and ready for use.
Retention
Hardware
FIGURE 9 - INSTALL SPRINGS AND HARDWARE
INSTALL SPRINGS AND SPRING RETENTION HARDWARE

National Sales & Service Office:
RITE-HITE®
8900 N. Arbon Drive
P.O. Box 245020
Milwaukee, Wisconsin 53224
Phone: [phone]
1-800-456-0600
www.ritehite.com
Representatives in all Major Cities
RITE-HITE®STANDARD WARRANTY
RITE-HITE®warrants that its products will be free from defects in design, materials, and workmanship for a
period of 365 days 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 and in no event no more than 30 days after the
warranty has expired. In order to be entitled to the benefits of this warranty, the products must have been
properly installed, maintained, and operated within their rated capacities and/or specified design parameters,
and not otherwise abused. Periodic lubrication and adjustment is the sole responsibility of the owner. This
warranty is RITE-HITE’s®exclusive warranty. RITE-HITE®EXPRESSLY DISCLAIMS ALL IMPLIED
WARRANTIES, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. Non-
standard warranties, if any, must be specified by RITE-HITE®in writing.
In the event of any defects covered by this warranty, RITE-HITE®will remedy such defects by repairing or
replacing any defective equipment or parts, bearing all the costs for parts, labor, and transportation. This shall
be the exclusive remedy for all claims whether based on contract, negligence, or strict liability.
LIMITATION OF LIABILITY
RITE-HITE®SHALL NOT IN ANY EVENT BE LIABLE FOR ANY LOSS OF USE OF ANY EQUIPMENT OR
INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND, WHETHER FOR BREACH OF WARRANTY,
NEGLIGENCE, OR STRICT LIABILITY.