Valve Adjustments - Function Manifold; How To Adjust The System Relief Valve; How To Adjust The Secondary Boom Down Relief Valve - Genie Z-45 Service And Repair Manual

September 2016
9-2 Valve Adjustments - Function
Manifold
How to Adj ust the Sy stem Reli ef Valve
How to Adjust the System Relief
Valve
Note: Perform this procedure with the boom in the
stowed position.
Note: Refer to Function Manifold Component list to
locate 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 Move and hold the function enable toggle
switch to either side and hold the primary
boom extend/retract toggle switch in the
retract direction with the primary boom fully
retracted.
3 Observe the pressure reading on the pressure
gauge. Refer to Specifications, Hydraulic
Specifications.
4 Turn the machine off. Hold the system relief
valve with a wrench and remove the cap.
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 through 4 and recheck relief
valve pressure.
7 Remove the pressure gauge.
Part No. 1268546GT Z®-45/25 Bi-Energy • Z®-45/25J Bi-Energy
How to Adj ust the Sec ondary Boom D own R elief Valv e
How to Adjust the Secondary
Boom Down Relief Valve
Note: Perform this procedure with the boom in the
stowed position.
Note: Refer to Function Manifold Component list to
locate the secondary boom down relief valve.
1 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test port on the function
manifold.
2 Move and hold the function enable toggle
switch to either side and hold the secondary
boom up/down toggle switch in the down
direction with the secondary boom fully
lowered.
3 Observe the pressure reading on the pressure
gauge. Refer to Specifications, Hydraulic
Specifications.
4 Turn the machine off. Hold the secondary
boom down relief valve with a wrench and
remove the cap.
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 through 4 and recheck relief
valve pressure.
7 Remove the pressure gauge.
Service and Repair Manual
Manifolds
51