Genie Z-60/34, Service Manual

Page: 119 / 183

Part No. 75861 Genie Z-60/34 4 - 45
November 2003 Section 4 • Repair Procedures
REV A
8-4
Valve Adjustments -
Function Manifold
How to Adjust the System
Relief Valve
Perform this procedure with the
boom in the stowed position.
1 Connect a 0 to 5000 psi / 0 to 345 bar pressure
gauge to the test port (item Z) on the function
manifold.
2 Start the engine from the ground controls.
3 Hold the function enable switch to the high rpm
position and activate and hold the retract switch
with the boom fully retracted.
4 Observe the pressure reading on the pressure
gauge. Refer to Section 2, Specifications.
5 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap (item T).
6 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.
7 Repeat steps 2 through 5 and recheck relief
valve pressure.
8 Remove the pressure gauge.
How to Adjust the Primary Boom
Down Relief Valve
Perform this procedure with the
boom in the stowed position.
1 Connect a 0 to 5000 psi / 0 to 345 bar pressure
gauge to the test port (item Z) on the function
manifold.
2 Start the engine from the ground controls.
3 Hold the function enable switch to the high rpm
position and activate and hold the primary
boom down switch with the primary boom fully
lowered.
4 Observe the pressure reading on the pressure
gauge. Refer to Section 2, Specifications.
5 Turn the engine off. Use a wrench to hold the
relief valve and remove the cap (item AE).
6 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.
7 Repeat steps 2 through 5 and recheck relief
valve pressure.
8 Remove the pressure gauge.
MANIFOLDS