94 CHAPTER 3
Maintenance
Note:The oil must be clean and free
of any dirt, metallic particles
or sand etc.) The use of a
filtering screen is strongly
recommended while filling the
tank with new oil.
18. Unscrew the test port on the
return filter. and plug a pressure
hose in the to push air in the
hydraulic tank. then feed the
system. This will force feed the
hydraulic pump and bleed the
hydraulic system at once,
preventing the pump from
running dry — and therefore
burning out — and the system
from unnecessary cavitation.
Filter Element
Replacement Procedure
To protect new components of the
hydraulic system, the return filter
element must be changed after the first
50 hours of operation of the vehicle.
Then, change the element twice a year
(refer to “Preventive Maintenance
Chart” on page 117).
The filter restriction indicator located at
front of the tank (Figure #1.90) will
indicate if the filter requires to be
changed. Replace the filter when the
indicator is in the yellow zone, before it
reaches the red zone. This will keep
the oil clean, extend component life
expectancy and reduce breakdowns.
Figure 146. Filter restriction
indicator
WARNING
IT IS NOT RECOMMENDED TO MIX
DIFFERENT
BRAND NAMES AND/OR
GRADES
OF OIL IN THE SAME TANK.
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