HYDRAULIC SYSTEM MLC80A-1/MLC90A-1/MLC100A-1/MLC100-1 SERVICE/MAINTENANCE MANUAL
2-16
Published 10-09-2020, Control # 259-06
Replacing Hydraulic Filters
Filter
An in-tank filter (3, Figure 2-13) filters return oil.
Replace the filter element when the fault alarm
comes on and the Filter 1 icon appears in the
Fault Bar of the main display.
Replace the filter element at each oil change
interval.
NOTE: It is normal for the fault alarm to come on at startup
when the oil is cold. The fault alarm should turn off
after the hydraulic oil warms up.
To replace the hydraulic filter, proceed as follows (see
Figure 2-13
).
1. Stop the engine.
2. Vent the hydraulic tank using either of the vent valves
(see Figure 2-12, page 15
).
3. Take precautions to prevent being burned by hot oil.
4. Disconnect the electric cable from the pressure switch.
5. Clean the cover (2) and the area around the filter cover.
Do not allow contaminants to enter the hydraulic tank.
6. Remove the cover.
7. Remove the spring.
8. Lift the filter element out of the hydraulic tank using the
handle provided and discard it according to local
environmental regulations.
9. Install a new filter element so it is fully seated in the
hydraulic tank.
10. Replace the O-ring (1) with a new one.
11. Install the cover.
12. Connect the electric cable to the pressure switch.
13. Install the guard.
14. Start the engine and allow the hydraulic system to reach
its normal operating temperature.
15. Check the filter cover for leaks and service as required.
16. Stop the engine.
17. Check the hydraulic tank level and fill as required.
CAUTION
Avoid Hydraulic System Damage!
Original equipment manufacturers’ filter elements,
available from the Manitowoc Crane Care Lattice Team,
must be used on this crane. Substituting with any other
brand or type of filter element is not allowed.
Non-OEM filter elements may collapse under pressure.
This will allow unfiltered oil to be drawn into the hydraulic
system. Pumps, motors, and valves can be destroyed.
Manitowoc Cranes will reject warranty claims for
damaged hydraulic components if proper hydraulic filter
elements are not used.
• Do not attempt to clean or reuse elements.
• Do not operate the crane without filter elements
installed.
Item Description
1 O-ring
2 Cover
3Filter
FIGURE 2-13
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