Terex Genie Z-34/22 IC, Service And Repair Manual

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Service and Repair Manual September 2016
Hydraulic Pumps
54 Z-34/22 IC Part No. 1274592
7-3
Drive Pump
The drive pump is a bi-directional variable
displacement piston pump. The pump output is
controlled by a non-feedback, proportional
electrical displacement controller (NFPE), 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 Sauer Danfoss service
center.
How t o R emove t he Drive Pum p
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 Remove the drain plug from the hydraulic tank
and completely drain the tank into a container
of suitable capacity. Refer to Specifications.,
Hydraulic Specifications.
Bodily injury hazard. Beware of
hot oil. Contact with hot oil may
cause severe burns.
2 Disconnect the electrical connectors from the
coils of the NFPE controller (NFPE) located on
the drive pump.
3 Tag,disconnect and plug the hydraulic hoses
from 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 Support the pump with a suitable lifting device.
5 Remove the drive pump mounting bolts.
Carefully remove the pump.
Component damage hazard. The
pump(s) may become
unbalanced and fall if not
properly supported.
Component damage hazard.
When installing the pump, do
not force the pump coupler into
the flexplate or damage to the
pump shaft seal may occur.
How t o Prime the Driv e Pum p
How to Prime the Drive Pump
1 Connect a 0 to 6000 psi / 0 to 414 bar
pressure gauge to the test port on the drive
pump.
2
Gasoline/LPG models
: Disconnect the
ignition coil wire from the center of the ignition
coil.
Diesel models
: Hold the manual fuel shutoff
lever clockwise to the closed position.
3 Crank the engine with the starter motor for
15 seconds, wait 15 seconds, then crank the
engine an additional 15 seconds or until the
pressure reaches 320 psi / 22 bar.