Genie ZX-135/70 Service Manual page 171

Service Manual
Hydraulic Pumps
5 Adjust the function pump standby pressure.
Turn the adjustment screw clockwise to
increase the pressure or counterclockwise to
decrease the pressure. Tighten the set screw.
6 Turn the engine off and remove the pressure
gauge.
How to Adjust the Function Pump
Pressure Compensator
Note: Two people will be required to perform this
procedure.
1 Confirm the system relief pressure is set to
specification. Refer to repair procedure, Valve
Adjustments - Function Manifold.
2 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the test port on the function
manifold
3 Start the engine from the ground controls and
change the rpm to high idle.
4 Push and hold the high speed function enable
button (rabbit symbol). Do not activate any
boom functions.
5 Observe the pressure reading on the pressure
gauge.
Result: The gauge should show 2900 psi /
200 bar.
Result: If the gauge does not show 2900 psi /
200 bar, proceed to step 6 to adjust the
function pump pressure compensator.
156
6 Loosen the set screw for the pressure
compensator adjustment screw.
1 pressure compensator set screw
2 pressure compensator adjustment screw
7 Adjust the pressure compensator pressure.
Turn the adjustment screw clockwise to
increase the pressure or counterclockwise to
decrease the pressure. Tighten the set screw.
8 Turn the engine off and remove the pressure
gauge.
ZX-135/70
August 2014
Component damage hazard.
Do not adjust the pressure
compensator higher than
specified.
Part No. 218700