Valve Adjustments - Function Manifold - Genie Z-30/20N Service Manual

Section 4 • Repair Procedures
MANIFOLDS
7-2
Valve Adjustments -
Function Manifold
How to Adjust the System Relief
Valve
1 Connect a 0 to 5000 psi / 0 to 350 bar pressure
gauge to the test port on the function manifold.
2 Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position.
3 Move and hold the function enable toggle switch
to either side and move and hold the primary
boom extend/retract toggle switch in the retract
direction with the primary boom fully retracted.
Observe the pressure reading on the pressure
gauge. Refer to Section 2, Specifications .
4 Turn the machine off. Hold the system relief
valve with a wrench and remove the cap
(item R).
5 Adjust the internal hex socket. Turn it clockwise
to increase the pressure or counterclockwise to
decrease the pressure. Install the relief valve
cap.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
6 Repeat steps 2 and 3 to confirm the relief valve
pressure setting.
4 - 36 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
How to Adjust the Primary Boom
Down Relief Valve
1 Connect a 0 to 3000 psi / 0 to 200 bar pressure
gauge to the test port on the function manifold.
2 Turn the key switch to ground control and pull
out the red Emergency Stop button to the on
position.
3 Move and hold the function enable toggle switch
to either side and move and hold the primary
boom up/down toggle switch in the down
direction with the primary boom fully lowered.
Observe the pressure reading on the pressure
gauge. Refer to Section 2, Specifications .
4 Turn the machine off. Hold the primary down
relief valve with a wrench and remove the cap
(item F).
5 Adjust the internal hex socket. Turn it clockwise
to increase the pressure or counterclockwise to
decrease the pressure. Then install the relief
valve cap.
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
6 Repeat steps 2 and 3 to confirm the relief valve
pressure setting.
June 2011
REV B
Part No. 139378