Hydraulic Pump; How To Test The Function Pump - Genie GTH-1056 Service And Repair Manual

Service and Repair Manual

Hydraulic Pump

6-1
Hydraulic Pump
How to T est the Func tion Pump

How to Test the Function Pump

Note: When removing a hose assembly or fitting,
the O-ring (if equipped) on the fitting and/or hose
end must be replaced. All connections must be
torqued to specification during installation. Refer to
Specifications, Hydraulic Hose and Fitting Torque
Specifications.
1 Tag, disconnect and plug the high pressure
hydraulic hose from the primary function
manifold. Cap the fitting on the main valve.
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.
Note: The high pressure hose is the smaller of the
two hoses.
2 Connect a 0 to 5000 psi / 0 to 350 bar
pressure gauge to the high pressure hose
disconnected in step 1.
3 Hold the manual fuel shut-off lever on the
engine in the closed position.
48
4 Observe the pressure gauge while cranking
the engine in one second intervals.
Result: If the pressure gauge reads 3190 psi /
220 bar, immediately stop. The pump is good.
Result: If the pressure fails to reach 3190 psi /
220 bar, the pump needs to be adjusted OR or
the pump or pump coupling is faulty and will
need to be serviced or replaced.
5 Remove the pressure gauge and install the
high pressure hose onto the pump. Torque to
specification. Refer to Specifications,
Hydraulic Hose and Fitting Torque
Specifications.
GTH-1056
April 2017
Component damage hazard.
There is no relief valve in the
hydraulic pump and the pump
can be damaged if the pressure
is allowed to exceed
specification. When testing the
pump, crank the engine in one
second intervals until the
correct pressure is confirmed.
Do not over-pressurize the
pump.
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.
Part No. 1278145