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Electrical System
Generator
Refer to the Generator Operator's Manual for all
scheduled generator maintenance procedures.
Hydraulic Pump
Hydraulic Oil Specifications
Refer to Figure 31 and the table following for
recommended hydraulic oils.
31
Ref
Description
A
Use ISO Viscosity Grade 10 or 15 Hydraulic Fluid
B
Use Automatic Transmission Fluid
Adding Hydraulic Oil
Fill the reservoir with automatic transmission fluid or
any clean hydraulic fluid having a viscosity index that is
suitable for the climate conditions in which the unit will be
operated. Refer to the preceding table.
B
A
B
Note: Standard units are supplied with automatic
transmission fluid (ATF), and arctic units are supplied with
long life synthetic hydraulic fluid.
Priming the Hydraulic Pump
Pumps that have been disassembled for repair, or pumps
that have been replaced, require proper priming to avoid
possible pump failure. A pump is primed when the internal
portions of the pump are filled with oil and all air has been
expelled. To prime the pump:
1. Make sure that the oil reservoir (A, Figure 32) is filled
with oil to the full mark.
2. Place a catch pan under the pump to catch excess
oil.
3. Turn on the ignition switch and move the tower switch
to the UP position. Do so intermittently, to "jog" the
pump. This will expel air and oil through the loosened
fitting. Repeat until oil flow is free of air.
A
4. Turn off the ignition switch.
5. Remove the catch pan and dispose of the oil.
Make sure to obey the guidelines of governmental
agencies.
6. Replenish the oil in the reservoir to the full mark.
32
Once the pump has been primed, the cylinder should be
purged of air. To purge the cylinder of air:
1. Make sure that the oil reservoir is filled with oil to the
full mark.
2. Move the tower switch to the DOWN position. Make
sure that the tower is fully lowered. Turn off the
ignition switch.
3. Replenish the oil in the reservoir to the full mark.
A
en
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