Valve Adjustments - Function Manifold; How To Adjust The System Relief Valve; How To Adjust The Primary Boom Down Relief Valve - Genie Z-30/20N Service Manual

Service Manual
Manifolds
7-2 Valve Adjustments - Function
Manifold
How to Adjust the System Relief How to Adj ust the Sy stem Reli ef Valve
Valve
Note: Perform this procedure with the boom in the
stowed position.
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
Specifications, Manifold Component
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.
7 Remove the pressure gauge.
82
Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
How to Adjust the Primary Boom How to Adj ust the Primary Boom Dow n R elief Valv e
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.
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.
7 Remove the pressure gauge.
April 2016
Part No. 139378