Drive Pump - Genie S-80 Service Manual

Section 4 • Repair Procedures
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 only be performed at an authorized
Sundstrand-Sauer service center. Call Genie
Industries Service Department 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 the
hose end must be replaced. All connections must
be torqued to specification during installation.
Refer to Section 2, Hydraulic Hose and Fitting
Torque Specifications .
1 Disconnect the wire harness at the electronic
displacement controller (EDC), located on the
drive pump.
4 - 40
2 Close the two hydraulic tank valves located at
the hydraulic tank.
S-80 • S-85 • S-80X
February 2012
Component damage hazard. The
engine must not be started with
the hydraulic tank shutoff 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.
open closed
Part No. 122985