Checklist E Procedures; Test Or Replace The Hydraulic Oil - Genie Z-30/20N Service Manual

June 2011
REV A
E-1

Test or Replace the Hydraulic Oil

Note: Genie specifications require that this
procedure be performed every 2000 hours or every
two years, whichever comes first. Perform this
procedure more often if dusty conditions exist.
Replacement or testing of the hydraulic oil is
essential for good machine performance and
service life. Dirty oil and suction strainers may
cause the machine to perform poorly and
continued use may cause component damage.
Extremely dirty conditions may require that the oil
be changed more often.
Note: Before replacing the hydraulic oil, the oil may
be tested by an oil distributor for specific levels of
contamination to verify that changing the oil is
necessary. If the hydraulic oil is not replaced at
the two year inspection, test the oil quarterly.
Replace the oil when it fails the test.
Note: 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 2, Hydraulic Hose and
Fitting Torque Specifications.
Note: Perform this procedure with the boom in the
stowed position.
Part No. 139378

Checklist E Procedures

Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
Section 3 • Scheduled Maintenance Procedures
1 Close the hydraulic shutoff valve located at the
hydraulic tank.
Component damage hazard. The
machine must not be operated
with the hydraulic tank shutoff
valve in the closed position or
component damage will occur. If
the tank valve is closed, remove
the key from the key switch and
tag the machine to inform
personnel of the condition.
2 Place a suitable container under the hydraulic
tank. Refer to Section 2, Specifications.
3 Tag, disconnect and plug the hydraulic hose
from the hydraulic tank shutoff valve.
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 Open the valve on the hydraulic tank and
completely drain the oil into a suitable
container.
Bodily injury hazard. Beware of
hot oil. Contact with hot oil may
cause severe burns.
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