Part No. 62401
Genie S-100 • S-105 • S-120 • S-125
7 - 70
Section 7 • Repair Procedures
First Edition • First Printing
9-1
Function Pumps
There are three hydraulic pumps connected to the
engine. There is one variable displacement pump
that is used for drive functions and two fixed
displacement pumps attached to the drive pump
that are used for all other machine functions.
How to Remove the
Function Pumps
When removing a hose assembly
or fitting, the O-ring on the fitting
and/or hose end must be replaced
and then torqued to specification
during installation.
Refer to Section Two,
Hydraulic
Hose and Fitting Torque
Specifications.
1 Close the two hydraulic tank valves located at
the hydraulic tank.
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.
2 Tag, disconnect and plug the hydraulic hoses
from the function pumps. Cap the fittings on the
pumps.
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.
3 Support the function pumps with an overhead
crane or other suitable lifing device.
4 Remove the pump mounting bolts. Carefully
remove the pumps.
Crushing hazard. The function
pumps may become unbalanced
and fall when the mounting bolts
are removed if they are not
properly supported.
Component damage hazard.
Be sure to open the two hydraulic
tank valves and prime the pumps
after installing the pumps.
See 9-2,
How to Prime the Pumps.
open closed
Hydraulic Pumps
Summary of Contents for S-100
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