120 Hydraulic System
Replacing Filter Elements
IMPORTANT: 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. Change the element twice a year afterwards (see
Preventive Maintenance Chart on page 24).
The filter restriction indicator (Figure 5-29) will indicate, when the engine is running, if the filter
needs to be changed. Replace the filter before the indicator reaches the red zone. This will keep the oil
clean, extend component life expectancy and reduce failures.
Figure 5-29
Filter restriction indicator (steel tank)
To replace the hydraulic filter:
1. Lock out and tag out the vehicle (see Locking Out and Tagging Out the Vehicle on page 20).
2. Remove all 4 filter head cover bolts (see Figure 5-30).
Figure 5-30
Filter head cover and retaining bolts (rectangular tank)
3. Replace the filter element with a new one (see Figure 5-31).
Cover
Bolts
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