Poweramp LHP Series, Owner & User Manual

Page: 35 / 52

33
4111-0012 — Sept. 2018
© 2018 Systems, LLC
Adjust Lip Function
Sequence Valve Adjustment
Note: Sequence valve is factory set at 750 PSI. This
valve normally should not need adjustment.
See Troubleshooting section on pages 34-37 for
more information.
1. Raise the platform fully and engage the
maintenance prop in the service position.
2. Turn OFF all electrical power to the dock leveler.
3. Attach lock out/tag out devices.
4. Loosen jam nut.
5. Adjust hex adjusting screw ( B ) as follows:
• If the lip opens as the platform begins to rise, turn
sequence valve clockwise in 1/4 turn adjustments
until operation is satisfactory.
• If the lip will not fully retract when the platform
returns to the stored position, turn sequence
valve counterclockwise in 1/4 turn increments.
6. Tighten the jam nut.
7. Turn ON electrical power to the dock leveler.
8. Remove lock out/tag out devices.
9. Disengage the maintenance prop.
10. Cycle leveler and verify lip operation.
11. Repeat steps 1– 10 as necessary.
A — Sequence Valve
B — Pressure Relief Valve
C — C1 Port (Lip Cyl.)
D — C2 Port (Hoist Cyl.)
All LH-series dock levelers are factory tested, and
should not require additional adjustments in the
field. Consult Systems, LLC Technical Services if
minor adjustments do not result in proper operation.
Whenever valve adjustments are completed, record
the number of turns made to allow an undesirable
adjustment result to be reversed.
ADJUSTMENTS
A
D
C
A
B
B
Figure 26