HYDRAULIC SYSTEM MLC165-1 SERVICE/MAINTENANCE MANUAL
2-26
Published 05-26-17, Control # 238-02
Replacing Pilot Filter
See Figure 2-25 for this procedure.
If the pilot filter is dirty, a fault alarm
comes on and a fault symbol appears on
active the display. The Hydraulic Filter
icon and corresponding filter number 2
appears on the fault display.
Replace the pilot filter element if the fault
appears and at each oil change interval.
NOTE It is normal for the alert to come on at start-up when
the oil is cold. If the filter is not plugged, alert will
turn off after hydraulic oil warms up.
To replace the pilot filter element:
1. Stop the engine.
2. Remove the filter bowl (1) by rotating it counter-
clockwise.
3. Remove the used filter element (2) from the manifold
adapter (3) and dispose of it properly.
4. Lubricate the filter bowl (1) and manifold adapter (3)
threads with clean hydraulic oil.
5. Lubricate all filter element (2) seals with clean hydraulic
oil.
6. Install the filter element (2) onto the manifold adapter
(3).
7. Install the filter bowl (1) onto the manifold adapter (3) by
rotating it clockwise and tightening to 35-40 ft-lb (48-54
Nm).
8. Start the engine and allow the hydraulic system to reach
it’s normal operating temperature.
9. Check the pilot filter for leaks and service as required.
Figure 2-25. Pilot Filter
Item Description
1Filter Bowl
2 Filter Element
3 Manifold Adapter
Left-Side Enclosure on
Front of Hydraulic Tank
WARNING
Burn Hazard
Oil in the pilot system may be extremely hot. Allow the
hydraulic oil to cool before replacing the pilot filter.
CAUTION
Avoid Hydraulic System Damage
Original equipment manufacturers’ filter elements—
available from Manitowoc—must be used on this crane.
Substituting with any other brand or type of filter element
is not allowed.
Filter elements made by other manufacturers may
collapse under pressure. This action will allow unfiltered
oil to be drawn into the hydraulic system—pumps, motors,
and valves can be destroyed.
Manitowoc will reject warranty claims for damaged
hydraulic components if the proper hydraulic filter
elements are not used.
Do not attempt to clean or reuse the elements.
Do not operate the crane without filter elements installed.
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