Download User`s Manual - Curlin, Inc.

Secondary manifold adjustment
Before servicing the dock leveler, read and follow the Safety
Practices on page 3. Failure to do so could result in death or
serious injury.
Fig. 25
Disconnect power and properly tag or lock out to prevent
accidental operation while making adjustments.
Do not work under the dock leveler ramp or lip unless both
maintenance struts are securely supporting the leveler, and
the lip maintenance bar is supporting the lip.
SV3
SV1
PS1
1000 PSI
Port 4
(to pump C1)
Port 2
(to bumper ret)
Port 8
(to pump C2)
Port 6
(to main cyl)
SV2
PS2
RV3
3000 PSI
Port 5
(ret to tank)
Port 7
(to lip ext)
Port 1
(to bumper ext)
SV4
DescriptionPurposeAdjustment
PS2 Pressure Switch
Controls when bumpers will extend by
checking for low pressure in system.
Pressure switch will be set at 100 PSI at factory.
Solenoid Valve (SV1)
Keeps bumpers from extending while deck
and/or lip are in motion.
No adjustment is required.
Solenoid Valve (SV2)
Directs the flow between the main cylinders
and bumpers extending.
No adjustment is required.
PS1 Pressure Switch
Tells the motor to shut off once the bumpers
are extended.
Pressure switch will be set at 1000 PSI at
factory.
Solenoid Valve (SV3)
Allows bumpers to extend once deck and lip
have stopped moving.
No adjustment is required.
Relief Valve (RV3)
Controls maximum pressure in the system
when bumpers come in contact with
vehicle.
No adjustment is required. Relief valve set at
3000 PSI at factory.
April 2013
6003935D — 60-80K Hydraulic Dock Leveler
©2013 4Front Engineered Solutions, Inc.
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