How To Adjust The Function Pump Pressure Compensator - Genie GTH-1048 Service Manual

Service Manual
Hydraulic Pump
4 Loosen the set screw for the standby pressure
adjustment screw.
1 standby pressure adjustment screw
2 set screw
3 hydraulic supply line (from tank)
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.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
86
How to Adj ust the Functi on Pum p Press ure Com pens ator
How to Adjust the Function Pump
Standby Pressure
Note: Two people will be required to perform this
procedure.
1 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to test port 'TP' on the
primary function manifold. Refer to Primary
Function Manifold Components.
2 Start the engine and allow the engine to run at
low idle.
3 Fully retract the boom.
4 Continue to activate the boom retract function
and observe the pressure reading on the
pressure gauge.
Result: The pressure gauge reads
3190±50 psi / 220±3.4 bar. The pump is
functioning correctly. Proceed to step 7.
Result: The pressure gauge fails to read
3190±50 psi / 220±3.4 bar. The pressure
setting needs to be adjusted. Proceed to step
5.
GTH-1048 • GTH-1056
March 2016
Part No. 123701
Courtesy of Crane.Market