How To Remove The Function Pump - Genie Z-40/23N Service And Repair Manual

Service and Repair Manual
Hydraulic Pump
6-2
How to Remove the Function
Pump
The function pump motor operates at various
speeds, depending on the flow and pressure
required for the machine function selected. A
speed sensor, built into the pump motor, enables
the control system to monitor and control the speed
of the pump motor, which controls the flow output
of the 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 Place a suitable container under the hydraulic
tank. Refer to Section 2, Specifications.
2 Remove the drain plug from the hydraulic
tank. Completely drain the hydraulic tank into
a container of suitable capacity..
Bodily injury hazard. Beware of
hot oil. Contact with hot oil may
cause severe burns.
3 Tag, disconnect and plug the hydraulic hoses
from the pump. Cap the fittings on 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.
4 Remove the pump mounting bolts. Carefully
remove the pump.
Note: When replacing the function pump, it will
need to be calibrated. Refer to Repair Procedure,
How to Calibrate the Function Pump.
50
How to Calibrate the Function
Pump
Calibration of the function pump is essential to
good machine performance and service life.
Continued use of an uncalibrated or improperly
calibrated function pump could result in reduced
machine performance. The function pump must be
calibrated before machine functions are calibrated
or before adjusting boom function speeds.
Note: This procedure must be performed with the
rotary speed controller turned to the full clockwise
position.
1 Calibrate the proportional relief valve.Refer to
Repair Procedure, How to Calibrate the
Proportional Relief Valve.
2 Turn the key switch to platform control.
3 Pull out the red Emergency Stop buttons to the
on position at both the ground and platform
controls.
4 Do not press down the foot switch.
5 Move and hold the drive enable toggle switch
in the right direction while holding the steer
rocker switch in the right direction.
Z-40/23N, Z-40/23N RJ
September 2016
Part No. 1268528