RITE-HITE RHH-5000, Руководство пользователя

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LEVELER ADJUSTMENTS
HYDRAULIC VALVE ADJUSTMENTS
(BUCHER POWER UNIT)
FLOW CONTROL VALVE ADJUSTMENT
(Controls Leveler Descent)
NOTE:
Check oil level before making any adjustments.
1. Leveler must be adjusted to lower, from full raised
position with lip extended to the header stops in less than 20
seconds.
2. Press RAISE button and run the platform up until the lip extends.
3. Release RAISE button and allow the platform to fall completely
below dock and stop. Verify with a stop watch that the platform
falls according to the times in step 1. If not, readjust flow control
valve.
4. Set flow control valve (first loosen locknut on valve).
See Figure 14.
- To fall slower - Turn in (clockwise) in 1/4 turn increments.
- To fall faster - Turn out (counter-clockwise) in 1/4 turn
increments.
Or set valve at starting point (3-1/2 turns clockwise from fully out).
5. Repeat procedure to verify fall time as needed to fall according to
step 1. 1/8 turns might be necessary to fine tune the adjustment.
6. Tighten locknut on flow control valve.
SEQUENCE VALVE ADJUSTMENT
(Controls Lip Extension)
NOTE:
Check oil level before making any adjustments.
NOTE: Sequence valve is factory set. Adjustments to be
completed by trained technician only.
1. When the leveler is fully raised and the lip does not extend, the
Sequence Valve is set too high.
2. Loosen adjustment nut.
3. Turn adjustment screw in completely (clockwise) with an Allen
wrench. See Figure 14.
4. Back screw out 5 1/2 turns to get to factory starting point and
tighten adjustment nut.
5. Press RAISE button and run the platform up until the lip extends.
6. Verify that the lip extends only at the top of the ramp cylinder
stroke. If not, continue with Sequence Valve adjustment.
- Turn adjustment screw out (counter-clockwise) in 1/8 turn
increments. Lip will extend more quickly.
- Turn adjustment screw in (clockwise) in 1/8 turn increments. Lip
will extend more slowly.
7. Release RAISE button and allow the platform to fall completely
below dock and stop.
8. Verify that the lip will fall to pendant as the platform is raised up
to store the lip in the keepers. If lip re-extends, turn adjustment
screw in (clockwise) in 1/8 turns and retest.
9. Re-test the unit several times to verify the setting.
Infinite Lip Control
(IFC) Valve
To Lip Cylinder
System Relief Valve
(Set at 1250 PSI. DO NOT adjust
without premission from Rite-Hite)
Flow Control
Lock Nut
Lip
Pilot-To-Close
Check Valve:
17:1
To Ramp
Cylinder
Sequence
Valve
Lip
Pilot-To-Open
Check Valve (3:1)
Ramp
Pilot-To-Close
Check Valve (3:1)
FIGURE 14 - BUCHER POWER UNIT END HEAD
• Flow Control valve is factory adjusted.
• Adjustments to be completed by trained technician only.
RHH-5000 High Capacity Dock Leveler
Owner’s Manual
Rite-Hite
®
14 Publication: AMEN00206 2020-02-04