Section 3 • Scheduled Maintenance Procedures
Part No. 116478
AL8000HT Light Tower
3 - 27
REV A
September 2008
Checklist E Procedures
E-1
Test or Replace the Hydraulic Oil
Note: Terex requires that this procedure be
performed every 2000 hours or every two years,
whichever comes first.
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 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.
1 Open both cabinet covers.
2 Tag and disconnect the battery cables from the
battery.
Electrocution hazard. Contact with
electrically charged circuits could
result in death or serious injury.
Remove all rings, watches and
other jewelry.
3 Tag, disconnect and plug the hydraulic hoses
from the power unit. Cap the fittings.
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 Tag and disconnect the electrical wiring and
cables from the power unit.
5 Support and secure the power unit to a suitable
lifting device.
6 Remove the fasteners securing the power unit to
the cabinet. Carefully remove the power unit
from the curb side of the machine.
Component damage hazard. The
hydraulic reservoir is plastic and
may become damaged if allowed
to fall when removed from the
machine.
7 Place a suitable container under the hydraulic
reservoir. Refer to Section 2,
Specifications for
capacity specifications.
8 Remove the hydraulic reservoir retaining
fasteners from the power unit. Carefully remove
the hydraulic reservoir from the power unit and
completely drain it into a suitable container.
Bodily injury hazard. Beware of hot
oil. Contact with hot oil may cause
severe burns.
