Drive Pump - Genie S-80 Service Manual

Service Manual
Hydraulic Pumps
7-2

Drive Pump

The drive pump is a bi-directional variable
displacement piston pump. The pump output is
controlled by the electronic displacement controller
(EDC), located on the pump. The only adjustment
that can be made to the pump is the neutral or null
adjustment. Any internal service to the pump
should be performed at an authorized
Sauer-Danfoss service center. Contact Genie
Product Support to locate your local authorized
service center.
How to Remove the Drive Pump
Component damage hazard. The
work area and surfaces where
this procedure will be performed
must be clean and free of debris
that could get into the hydraulic
system and cause severe
component damage. Dealer
service is recommended.
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 Disconnect the wiring plug at the electronic
displacement controller (EDC), located on the
drive pump.
114
2 Locate the two hydraulic tank valves at the
hydraulic tank. Close the valves.
open
3 Tag, disconnect and plug the hydraulic hoses
from the drive and function pumps. Cap the
fittings on the pumps.
4 Support the pumps with a suitable lifting
device and remove the two drive pump
mounting fasteners.
S-80 • S-85 • S-80X
February 2017
closed
Component damage hazard.
The engine must not be started
with the hydraulic tank shut-off
valves in the closed position or
component damage will occur. If
the tank valves are closed,
remove the key from the key
switch and tag the machine to
inform personnel of the
condition.
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. 1259369GT