RITE-HITE LEVEL-RITE LRL Series User manual

LEVEL-RITETM
LRL SERIES
Elevating Dock Lift
Printed in U.S.A. by RITE-HITE®Print Shop Publication No. 1174-R1
Copyright 2003-2004 RITE-HITE®June 2004
SERIAL NO. LT 02H0853 AND UP
Owner’s Manual
By Rite-Hite

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
2Pub. No. 1174-R1 - June 2004
TABLE OF CONTENTS
INTRODUCTION AND NOTICE TO USER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
SAFETY WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
OPERATIONAL SAFETY WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SAFETY DEVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
OWNER RESPONSIBILITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
GENERAL FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
INSTALLATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
HYDRAULIC SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
ELECTRICAL SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
REPLACEMENT PART LISTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
INTRODUCTION
The LEVEL-RITETM LRL Series Elevating Dock Lift by RITE-HITE®is designed to provide a safer work place for
workers in shipping and receiving dock areas. The LRL Series Elevating Dock Lift is a hydraulic device that, when
properly installed and operated provides safe and secure access between truck and dock. The LRL Series Elevating
Dock Lift is operated from a pendant control station.
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 fitted to your
specific operation. Call your local representative or the RITE-HITE®Corporation at 414-355-2600.
The LEVEL-RITETM products in this manual are covered by one or more of the following U.S. patents: 4,531,248;
4,560,315 (RE: 32,968); 4,570,277; 4,605,353 (RE: 33,154); 4,634,334; 4,692,755; 4,744,121; 4,819,770; 4,843,373;
4,865,507; 4,920,598; 4,995,130; 5,040,258; 5,111,546; 5,271,183; 5,299,386; 5,311,628; 5,323,503; 5,375,965;
5,440,772; 5,442,825; 5,453,735; 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; 6,065,172; 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; 6,322,310; 6,311,352; 6,360,394; 6,368,043, 6,431,819; and
pending U.S. and foreign patent applications. RITE-HITE®, LEVEL-RITETM, GUARDRITE®, SAFE-T-LIP®,
HYDRACHEK®, WHEEL-LOKTM , DOK-LOK®, DUAL-DOK®, and SAFE-T-GATE®are trademarks of RITE-HITE®
Corporation.

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004 3
SAFETY WARNINGS
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.
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.
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.
FIGURE 1 - LOCKOUT/TAGOUT
IMPORTANT
CAUTION
WARNING
DANGER
WARNING

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
4Pub. No. 1174-R1 - June 2004
OTHER IMPORTANT OPERATIONAL SAFETY WARNINGS
Never be under the LRL platform or lip without:
•Engaging the Maintenance Strut.
•Turning off power to the control box.
•Locking out and tagging out the main
power source, as shown under Safety
Warnings on preceding page.
Always barricade the LRL at ground level and
dock level from any form of traffic when
maintenance is required.
Inspect the LRL monthly to ensure that there are
no broken or worn parts which could cause
injury to personnel or damage to the equipment.
•Before starting installation or maintenance,
check and follow the safety procedures of the
facility where the LRL is being installed.
•Never enter a truck/trailer until its brakes are
set, air has been dumped from air ride
suspension (if applicable), and you have
visually inspected to be sure truck/trailer is
securely held in place by a vehicle restraint or
wheel chock per OSHA regulations.
•DO NOT operate with anyone under platform
or in front of the lip.
•Keep hands, limbs and loose hair clear of
equipment when operating the table. DO NOT
wear loose clothing or jewelry while operating
this equipment.
•When dock lift is not in use, always store it so
that it is level with the surrounding dock floor.
•If a malfunction does occur, always call your
authorized RITE-HITE®service representative
immediately.
DANGER
WARNING
WARNING
CAUTION

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004 5
SAFETY DEVICES
Never be under the LRL Series Elevating Dock
Lift platform or lip without:
•Engaging the Maintenance Strut. See below
right.
-Press UP Button until platform reaches its
highest position.
-Place Maintenance Strut in position. See
Figure 2.
-Press DOWN Button until platform stops
and Maintenace Strut is engaged.
•Lockout/Tagout power supply.
-Turn off the power to the control box.
-Lockout/tagout the main power source, as
shown under Safety Warnings on the inside
front cover of this manual.
-Always barricade the dock lift at dock level
and drive level to prevent any unauthorized
use of the dock lift.
Remove the Maintenance Strut.
•For Maintenance Strut removal, raise the dock
lift to its highest position. Return the
Maintenance Strut to the proper storage
position.
•If you are unable to install the Maintenance
Strut properly, contact your authorized
RITE-HITE®Service Representative or RITE-
HITE®Customer Service at 1-800-456-0600.
•Post warnings and barricades at dock level
and at drive level to indicate that work is
being done around and under the lift table.
•Lockout/Tagout power to the dock lift and
post warnings when work is being performed
on the dock lift.
MAINTENANCE STRUT
IN STORED POSITION
MAINTENANCE STRUT
IN POSITION
FIGURE 2 - ENGAGE MAINTENANCE STRUT
CAUTION
DANGER

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
6Pub. No. 1174-R1 - June 2004
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 specifications for replaceable or
repairable parts
•Tables identifying the grade (slope) for all
variations of length or configuration 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 effect 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
offers 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. Modifications 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. When industrial trucks are driven on and off
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.
10. In selecting dock equipment, it is important to
consider not only present requirements but also
future plans or adverse environments.

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004 7
GENERAL FEATURES
OPERATION/PERFORMANCE
This elevating dock lift is operated by a pushbutton
control station. Press and hold the UP button to raise the
lift. Press and hold the DOWN button to lower the lift.
STANDARD LIP
This is the extendable portion of the dock lift which
provides a bridge from the platform to the bed of the
trailer.
PLATFORM
The platform, along with the lip, provides the main bridge
between the dock and the trailer bed. The platform is
constructed in a four-sided box structure.
HYDRAULICS
The hydraulic system on the dock lift consist of a power
unit assembly, hydraulic oil reservoir, and pressure lines
to the scissor cylinders.
POWER UNIT
This unit pumps hydraulic fluid to the dock lift cylinders.
The power unit consist of an electric motor, gear pump,
hydraulic fluid reservoir, and valving.
VELOCITY FUSE
The elevating dock lift is equipped with an emergency
support system called a velocity fuse. This valve is
placed in the hydrualic feed line for the scissor cylinders.
This valve is a normally open, spring loaded check valve.
If the return oil overcomes the spring tension, the valve
will close, preventing return flow of oil, and stopping the
lifts downward movement. The lift will remain in the
stopped position.
When an emergency drop occurs, the lift should be
inspected thoroughly by a RITE-HITE representative. If
nothing has failed, normal operation can be resumed by
pressing the lift UP button to reset the velocity fuse.
PENDANT CONTROL STATION - STANDARD
The pendant control that has been sent with the standard
unit consists of two pushbuttons and a decal that
provides operational instructions. When the UP
pushbutton is pressed, the hydraulic power unit is
activated which pumps fluid to the lift cylinders and
ultimately raises the elevating dock lift. When the
DOWN pushbutton is pressed, a solenoid valve is
activated and the platform lowers.
PENDANT CONTROL STATION - RITE-UP
OPTION
The pendant control that has been sent with the Rite-Up
option unit consists of three pushbuttons and a decal that
provides operational instructions. When the UP
pushbutton is pressed, the hydraulic power unit is
activated which pumps fluid to the lift cylinders and
ultimately raises the elevating dock lift. When the Rite-Up
pushbutton is pressed, the hydraulic system regenerates
fluid to lift cylinders increasing the lift speed. The Rite-Up
option will lift a payload up to 2500 lbs. When the DOWN
pushbutton is pressed, a solenoid valve is activated and
the platform lowers.

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
8Pub. No. 1174-R1 - June 2004
INSTALLATION INSTRUCTIONS
TYPICAL
LIP RECESS
IF REQUIRED
PIT LENGTH
LIP LENGTH
DRAIN IF REQUIRED.
NECESSARY FOR OUTDOOR
APPLICATIONS.
CONDUIT(S) TO
POWER PACK
3"x 3"x 3/16"
CURB ANGLE
C/W ANCHORS
(BY OTHERS)
3" CONDUIT FOR
HYDRAULIC HOSES
MIN. BEND RADIUS 18"
1" CONDUIT REQUIRED
WITH ELECTRICAL OPTIONS
MIN. BEND RADIUS 12":
- SAFETY TRIP BARS
- UP LIMIT SWITCH
- PUSH BUTTON ON PLATFORM
C
L
C
L
30" 24"
FOR: LRL 6,000 LBS. CAPACITY UNIT
72x96 TO 96x120 PLATFORMS
NOTES:
1. PERIMETER OF PIT FLOOR
MUST BE KEPT LEVEL
2. PIT MUST BE KEPT SQUARE
3. PIT WIDTH AND LENGTH
CALCULATION
A) ADD 2 INCHES TO WIDTH AND LENGTH
B) ADD 1 INCH FOR EACH LIP PER SIDE TO
ALLOW FOR HINGE
EXAMPLE: 72" x 96" PLATFORM WITH LIP
ON ROLLING END
-WIDTH: 72 + 2 = 74 INCHES WIDE
-LENGTH: 96 + 2 + 1 = 99 INCHES LONG
4. LIP RECESS (IF REQUIRED)
LIP RECESS WIDTH = LIP WIDTH + 2 INCHES
LIP RECESS LENGTH = LIP LENGTH
5. CURB ANGLE LENGTH CALCULATION
2 PIECES: PIT WIDTH
2 PIECES: PIT LENGTH + 6 INCHES
3" APF
LRL 8,000 LBS. CAPACITY UNIT
LRL 10,000 LBS. CAPACITY UNIT
FIGURE 3 - PIT DETAILS

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004 9
INSTALLATION INSTRUCTIONS - CONT.
PREPARATION PRIOR TO INSTALLATION
1. Elevating dock lift is shipped equipped with lifting
lugs. DO NOT remove until lift is resting in pit. (Lifting
lugs prevent the lift table from opening when the lift
table is lifted into place.)
2. Verify that dock lift voltage matches the voltage
supplied.
INSTALLATION INTO PIT
1. Clean out pit and remove all debris from work area.
2. Attach lifting chain, dock lift and position as close to
pit area as possible.
3. Disconnect hydraulic hoses from power pack. Feed
hydraulic hoses through conduit.
NOTE: Hydraulic hoses MUST BE protected from
any dirt or debris that could enter the system.
4. If equipped, disconnect wiring from power pack.
Feed wiring through conduit.
5. Lower the dock lift into the pit while pulling the
hydraulic hoses and wiring through the conduits.
6. Install hydraulic hoses to power pack and make
necessary connections.
7. Remove the lifting lugs.
ELECTRICAL INSTALLATION PROCEDURES
8. Position power pack adjacent to the dock position.
9. Secure power pack in accordance with all local
electrical codes.
10. Connect wiring as indicated by Electrical Schematics
(See figure 11, 12 and 13).
Make sure that the lift power has been locked
out and tagged out according to OSHA
regulations and approved local codes before
performing any welding on the dock lift.
Make sure that the lifting equipment is rated for
3,000 lb. lifting capacity or greater.
•Post safety warnings and barricade work area
to prevent unauthorized use of the elevating
dock lift while work is being performed.
•ALWAYS ground to the frame or pit angle
when welding. DO NOT ground welding
equipment to any electrical components. DO
NOT ground to lift platform when welding
on lift frame. Damage to bearings or
electrical components may result.
•DO NOT connect green ground lead into
control box or junction box until all welding is
complete.
•Protect Hydraulic Hose assemblies from
damage due to welding, grinding or sharp
objects.
•DO NOT position the dock lift on its side or
turn the dock lift topside down at any time.
•If a procedure is not clearly defined in this
manual, contact your local representative or
RITE-HITE®at 1-800-456-0600 before
proceeding.
DANGER
WARNING
IMPORTANT
WARNING
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.

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
10 Pub. No. 1174-R1 - June 2004
INSTALLATION INSTRUCTIONS - CONT.
SHIM AND MOUNTING INSTALLATION
1. Square dock lift in pit area with spaces equal on all
sides. See figure 4.
2. Shim dock lift level to the floor and weld shims to the
frame. See figure 4.
3. By pressing the UP button, raise dock lift about eight
to twelve inches, check down speed and adjust if
required. See Adjustments.
4. Raise dock lift to working height and block dock lift at
roller end with base mounted maintenance strut. See
Safety Devices.
LEG ROLLER
WELD TO
BASE FRAME
BLOCK TO PIT
WALL BEHIND
BASE HINGE
(BY OTHERS)
WELD TO
BASE FRAME
BLOCK TO PIT
WALL IN FRONT
OF LEG ROLLER
(BY OTHERS)
BLOCK TO PIT
WALL BOTH
ENDS
SHIM UNDER
ROLLER PATH
SHIM UNDER FIXED
END LEG CLEVIS
FIGURE 4 - SHIM INSTALLATION
•ALWAYS ground to the frame or front pit angle
when welding. DO NOT ground welding
equipment to any electrical components. DO
NOT ground to lift platform when welding
on lift frame. Damage to bearings or electrical
components may result.
•DO NOT connect green ground lead into
control box or junction box until all welding is
complete.
IMPORTANT

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004 11
INSTALLATION INSTRUCTIONS - CONT.
5. Using mounting brackets on the frame as a guide,
drill hole of 5/8” diameter a minimum of 4-5/8” deep.
Clean out hole. See figure 5.
6. Insert 5/8” x 5” wedge anchor bolts. See figure 5.
7. Remember to check that the lift clears all possible
obstructions and does not create dangerous pinch or
shear points by operating it up and down a few
times.
8. Raise and lower elevating dock lift at least three
times to expel air from the system.
9. Observe carefully for any oil leaks.
INSTALLATION COMPLETE!
FRAME
LAG FRAME TO FLOOR
USING 5/8" x 5"LG.
WEDGE ANCHOR BOLTS
ALTERNATE
LAG BRACKET
POSITION ON
FRAME ENDS
TOP VIEW
PLATFORM REMOVED
FIGURE 5 - ANCHOR INSTALLATION
Never be under the LRL platform or lip without:
•Engaging the Maintenance Strut.
•Turning off power to the control box.
•Locking out and tagging out the main
power source, as shown under Safety
Warnings.
DANGER

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
12 Pub. No. 1174-R1 - June 2004
OPERATING INSTRUCTIONS OPERATING INSTRUCTIONS
1. Push and hold the UP button on the pendant control
to raise the dock lift.
NOTE: When UP button is released the dock lift will
stop.
2. Lower the lip (bridge plate) onto the vehicle. Ensure
the lip is supports by a minimum of 6” on the
truck/trailer floor. See figure 6.
3. Loading/unloading can now be completed.
4. Raise and store lip after loading/unloading is
complete.
5. Press and hold the DOWN button on the pendant
control to lower the dock lift.
NOTE: When DOWN button is released the dock lift
will stop.
SCISSOR LIFT LIP
6" MIN.
LIP IN
STORED POSITION
Read and obey these instructions to prevent
personal injury.
•DO NOT operate the elevating dock lift until
truck/trailer is parked against the dock bumpers
and the truck/ trailer has been secured.
•ALWAYS secure load when using the dock lift.
•NEVER enter a truck/trailer until its brakes are set,
air has been dumped from the air ride suspension
(if applicable), and you have visually inspected
truck/trailer to ensure truck/trailer is securely held
in place by a vehicle restraint or wheel chocks per
OSHA regulations.
•NEVER release the vehicle restraint or remove the
wheel chocks until loading/unloading is finished
and the truck driver has been given permission to
drive away from the dock.
WARNING
FIGURE 6 - LIP SUPPORT ON TRUCK / TRAILER

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004 13
MAINTENANCE PROCEDURES
SUGGESTED DOCK LIFT MAINTENANCE
Daily
1. Remove debris on and around dock lift.
2. Check unit for proper operation.
180 Days
1. Perform all Daily Maintenance.
2. Clean pit.
3. Lubricate the dock lift per chart. See figure 7.
4. Check oil level. Add oil if necessary. When adding
oil, use MV-22, MIL-H-5606 or equal.
5. Inspect structure and hinge pins for abnormal wear.
6. Inspect all conduit, boxes and electrical
connections for damage.
7. Check limit switch adjustment and operation (if
equipped).
•Post safety warnings and barricade work area,
at dock level and at ground level, to prevent
unauthorized use of the dock position
before maintenance has been completed.
•Make sure to engage the maintenance strut
before proceeding with any installation or
repair work.
OIL - SAE 30 WEIGHT
FIGURE 7 - LUBRICATION POINTS
WARNING

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
14 Pub. No. 1174-R1 - June 2004
FLOW CONTROL ADJUSTMENT
This adjustment to be performed by a qualified
technician only.
Refer to figure 8.
For adjustment, first unlock the outside locknut.
(Adjustments should be made in 1/4 turn increments)
•To decrease platform fall speed turn adjustment screw
clockwise.
•To increase platform fall speed turn adjustment screw
counterclockwise.
NOTE:
When making adjustments in extermely cold
temperatures (below freezing), run unit several times
to confirm that the velocity fuse doesn’t lock-up with
warmer oil.
Symptom
1. Lift table does not lift.
2. Lift table does not
maintain steady height.
3. Lift table locked in “UP”
position.
Probable Cause
a. Excessive load.
b. Fuse and/or overload blown.
c. Low oil level and/or oil leak.
d. Defective pump.
e. Defective Valve.
f. Filter is clogged.
a. Oil leak.
b. Defective check valve.
c. Defective solenoid valve.
a. Velocity fuse locked up due to air.
b. Velocity fuse locks up due to
valve adjustment.
(unit lowering to fast)
c. Bent safety stop bar.
d. Defective safety stop switch.
Remedy
a. Standard dock lift not to exceed
6000lbs., Rite-Up option not to exceed
2500lbs.
b. Check fuse and/or overload reset.
c. Check oil level. Check for leaks that
may have caused low oil level.
d. Check system pressure. If pressure is
to low may be a worn out pump.
Replace if necessary.
e. Check valve block. Repair/Replace if
necessary.
f. Clean or replace suction filter.
a. Repair oil leaks.
b. Replace check valve if necessary.
c. Replace solenoid valve if necessary.
a. Cycle unit (5 to 10 times) until velocity
fuse no longer locks up.
b. See Adjustments.
c. Replace bent safety stop bar.
d. Replace switch.
TROUBLESHOOTING AND ADJUSTMENTS
Locknut Adjustment
Screw
O-Ring
FIGURE 8 - FLOW CONTROL ADJUSTMENT

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004 15
HYDRAULIC SCHEMATIC
VELOCITY FUSE
SOL. A
5000 PSI
FLOW
CONTROL
VALVE
PRESSURE
RELIEF VALVE
3000 PSI
CHECK
VALVE 'A'
OIL RESERVOIR
SUCTION
FILTER
2.30 GPM
HYDRUALIC
GEAR PUMP
5 H.P. MOTOR
(2) PISTON
CYLINDERS
OIL RESERVOIR
SUCTION
FILTER PRESSURE
RELIEF VALVE
3000 PSI
CHECK
VALVE 'C'
PRESSURE
RELIEF VALVE
(FACTORY ADJUSTED)
SOL. B
3000 PSI
CHECK
VALVE 'B'
SOL. A
5000 PSI
FLOW
CONTROL
VALVE
CHECK VALVE 'A'
3 H.P. MOTOR
HYDRAULIC
GEAR PUMP
(2) PISTON
CYLINDERS
VELOCITY FUSE
3.0 GPM
FIGURE 10 - HYDRAULIC SCHEMATIC - RITE-UP OPTION
FIGURE 9 - HYDRUALIC SCHEMATIC - STANDARD

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
16 Pub. No. 1174-R1 - June 2004
ELECTRICAL SCHEMATIC
480 V
24 V 100VA
NOTE:
SHORT CIRCUIT PROTECTION
TO BE PROVIDED BY CUSTOMER
7 2
FIGURE 11 - STANDARD 3 PHASE SCHEMATIC
NOTE:
SHORT CIRCUIT PROTECTION
TO BE PROVIDED BY CUSTOMER
7
FIGURE 12 - 3 PHASE RITE-UP OPTION SCHEMATIC

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004 17
ELECTRICAL SCHEMATIC
480 V
24 V 100VA
NOTE:
SHORT CIRCUIT PROTECTION
TO BE PROVIDED BY CUSTOMER
6
NOTE:
* FOR CONTINOUS STROBE LIGHT FUNCTION
WHILE "UP" OR "DOWN" BUTTON IS DEPRESSED,
REMOVE STROBE LIGHT WIRE FROM TERMINAL
"7" TO TERMINAL "1" OF TIMER.
9
FIGURE 13 - 3 PHASE OPTIONAL STROBE LIGHT AND BELL SCHEMATIC

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
18 Pub. No. 1174-R1 - June 2004
FRAME REPLACEMENT PARTS
56 7 8910
23416
15
71411 12
13
1

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004 19
FRAME PARTS LIST
Item Qty Description Part Number
1 1 Up Limit Switch (Optional) 915-0040
2 2 Axle Pin 151-0072
3 4 Bushing 905-0005
4 2 Washer 920-0068
5 4 Hinge Pin 251-0070
6 8 Bushing 905-0012
7 8 Spring Pin 920-0056
8 4 Sleeve 151-0051
9 2 Spring Pin 920-0035
10 2Cylinder Pin 250-0082
11 4Roller CP-326
12 8Bushing 905-0019
13 2Roller Pin 250-0058
14 2Roller Pin (Inner) 151-0069
15 2Cylinder (See Page 21) -
16 2Spring Pin 920-0080
17 1Split Lip 12” (Not Shown) 32474

Level-RiteTM BY RITE-HITE®LRL Series Elevating Dock Lift Owner’s Manual
20 Pub. No. 1174-R1 - June 2004
HYDRAULIC PLUMBING PARTS
6
7
9
STANDARD RETURN LINES
RITE-UP OPTION
RETURN LINES
"B" "B"
"B" "B"
"A" "A"
"B" "B"
"A" "A"
13
HYDRAULIC FEED LINES - BOTH SYSTEMS
11 or 13
TO POWER PACK
TO POWER PACK
TO POWER PACK
1