29
4111-0024 — Apr. 2020
© 2020 Systems, LLC
Main Pressure Relief Adjustment
Note:
The main pressure relief may need to be
increased
if the platform does not rise or rises slowly
and the system operates in pressure relief mode.
The main pressure relief (
D
) may need to be
decreased
if the pump motor loads down when
platform reaches the full raised position.
See Troubleshooting section on pages 32-35 for
more information.
Self-Contained (Figure 30) manifold is shown for
reference.
1. Put the dock leveler in the stored position with the
lip folded.
2. Turn OFF all electrical power to the leveler.
3. Lock out and tag out the dock leveler, then place
the maintenance props in their service/down position
with hardware tightened by wrench, and ensure the
storage prop is locked out with the prop pin and clip.
4. Loosen jam nut (
E
).
5. Adjust adjusting screw (
F
) as follows:
• To increase pressure relief, turn adjusting screw
clockwise one full turn.
• To decrease pressure relief, turn adjusting screw
counterclockwise one full turn.
6. While holding the adjusting screw, tighten jam nut.
7. Raise the maintenance props to the stored
position and tighten all hardware, then remove prop
pin and clip.
8. Remove lock out/tag out devices and turn ON
electrical power to the leveler.
9. Test leveler and repeat steps 1– 8 as necessary.
Adjust Main Pressure Relief
Pressure relief adjustment on remote-mount units
is locked by the factory. Contact Systems, LLC
Technical Services for instructions.
ADJUSTMENTS
D — Pressure Relief Valve
E — Jam Nut
F — Adjusting Screw
Figure 30
E
D
F
