Manitowoc Published 05-03-17, Control # 228-03 2-7
16000 SERVICE/MAINTENANCE MANUAL HYDRAULIC SYSTEM
5. Twist the element handle counter-clockwise and pull the
filter element out of the body. Discard the element.
Do not attempt to clean or reuse the element.
Do not operate the crane without the return filter
elements installed.
6. Lubricate the o-ring at both ends of the new element with
clean hydraulic oil and securely install the element over
the stem in the housing.
7. If necessary, replace the o-ring in the filter cover.
8. Reinstall and securely tighten the filter cover.
9. Start the engine and allow the hydraulic system to return
to normal operating pressure and temperature. Check
the filter cover and vent plug for leaks. Securely tighten
the filter cover and vent plug as required.
10. Stop the engine, check the tank level, and refill the tank
as required.
11. Reinstall the two covers over the hydraulic tank.
Changing Oil
See Figure 2-1 for the following procedure.
Drain and refill the hydraulic system every 1,000 hours or
semiannually, whichever comes first, unless an alternate
interval has been established through an oil analysis
program:
1. Operate the crane until the hydraulic oil is at the normal
operating temperature. This will help prevent impurities
from settling in the system.
2. Make sure the crane is level.
3. Stop the engine.
4. Remove the cover above the hydraulic tank.
5. Remove the manual fill plug (2a).
6. Open the drain valve (8) and drain the tank completely
into a suitable container.
7. Clean all dirt from the access cover in the underside of
the tank and remove the cover. Keep dust and dirt
from entering the tank while covers are off.
8. Flush out any sediment inside the tank.
9. Carefully inspect the suction filters (strainers, inside the
tank) for damaged or clogged holes and for sludge, gum
or lacquer formation. If necessary, clean the filters:
a. Remove the access cover from the side of the tank.
b. Inspect the cover gasket and replace it if it is
damaged.
c. Remove the filter (strainers) from inside the tank.
d. Soak the filter in clean, nonflammable solvent.
Brush off the outer surface, and flush the filter from
the inside out. Discard the filter if it is damaged.
e. Securely reinstall the filter.
f. Re-install the access cover on the side of the tank.
10. Using a new o-ring, secure the access cover to the
underside of the tank.
FIGURE 2-5
A00651
Cover
Element
Inlet
Body
O-Ring
O-Rings
Head
O-Ring
Outlet
to Tank
CAUTION
In the Event of a Catastrophic Failure of a
Hydraulic Component
Contact your Manitowoc dealer or the Crane Care Lattice
Team if the crane’s hydraulic system has experienced a
catastrophic failure. To avoid additional damage, the
process of removing debris and contaminants must be
guided or performed by experienced crane technicians.
For general instructions following a catastrophic failure,
see Manitowoc Service Bulletin W007-009.
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