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

April 2016
7 Note the reading on the dial indicator.
Result: The measurement is less than
0.055 inch / 1.4 mm. The bearing is good.
Result: The measurement is more than
0.055 inch / 1.4 mm. The bearing is worn and
needs to be replaced.
8 Fully retract the primary boom. Raise the
primary and secondary booms to full height.
Visually inspect the dial indicator to be sure
the needle returns to the "zero" position.
9 Remove the dial indicator and rotate the
turntable 90°.
10 Repeat steps 4 through 9 until the rotation
bearing has been checked in at least four
equally spaced areas 90° apart.
11 Lower the primary and secondary booms to
the stowed position and turn the machine off.
12 Remove the dial indicator from the machine.
Part No. 139378
Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N

Checklist E Procedures

E-1

Test or Replace the Hydraulic Oil

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 a clogged suction strainer
or hydraulic filters may cause the machine to
perform poorly and continued use may cause
component damage. Extremely dirty conditions
may require oil changes to be performed more
frequently.
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 (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.
Note: Perform this procedure with the boom in the
stowed position.
Service Manual
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