Valve Adjustments - Function Manifold; How To Adjust The System Relief Valve; How To Adjust The Primary Boom Down Relief Valve - Genie Z-34/22 Service Manual

Service Manual
Manifolds
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.
96
How to Adj ust the Primary Boom Dow n R elief Valv e
How to Adjust the Primary 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 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 Specifications,
Manifold Component Specifications.
4 Turn the machine off. Hold the primary 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.
Then install the relief valve cap.
6 Repeat steps 2 and 3 to confirm the relief
valve pressure setting.
7 Remove the pressure gauge.
Z-34/22 Bi-Energy
April 2016
Tip-over hazard. Do not adjust
the relief valve higher than
specified.
Part No. 139234