C Checklist E Procedure; Test Or Replace The Hydraulic Oil - Genie GS-3390 Service Manual

Section 3 • Scheduled Maintenance Procedures
Checklist E Procedures
E-1

Test or Replace the Hydraulic Oil

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 oil changes
to be performed more frequently. Refer to Section
2, Specifications .
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.
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 Two, Hydraulic Hose
and Fitting Torque Specifications.
Note: In extreme cold conditions, 20°F / -6°C and
below, warm the engine for 5 minutes before
operating to prevent hydraulic system damage.
1 Turn the key switch to ground controls and pull
out the red Emergency Stop buttons to the on
position at both the ground and platform
controls.
3 - 38
2 Start the engine.
3 Raise the platform approximately 18 feet / 5.5 m
from the ground.
4 Before serial number 40351: Release the
safety arm latch, lift the safety arm and rotate
down to a vertical position.
After serial number 40350: Release the safety
arm latch, lift the safety arm and rotate to a
vertical position. Lock the safety arm in
position.
Note: Be sure that the safety arm is locked in the
vertical position.
5 Lower the platform onto the safety arm and turn
the engine off.
6 Attach a lifting strap from an overhead crane to
the entry ladder on the hydraulic tank side of
the machine.
7 Remove the entry ladder mounting fasteners
and remove the entry ladder from the machine.
8 Remove the retaining fasteners from the access
plate located behind the hydraulic and fuel tank
tray and remove the access plate from the
machine.
GS-3390 • GS-4390 • GS-5390
Crushing hazard. Keep hands
clear of the safety arm when
lowering the platform.
Crushing hazard. The entry ladder
could become unbalanced and fall
when removed from the machine if
not properly supported.
Part No. 72863
July 2007
REV C