HYDRAULIC SYSTEM MLC165-1 SERVICE/MAINTENANCE MANUAL
2-16
Published 05-26-17, Control # 238-02
HYDRAULIC SYSTEM MAINTENANCE
Only experienced technicians, trained in the operation of this
crane and its hydraulic system, shall perform the procedures
described in this section. The technicians shall read,
understand, and comply with the instructions in this section
and the display screen instructions in the Manitowoc
MLC165-1 Main Display Operation manual.
Contact your Manitowoc dealer for an explanation of any
procedure not fully understood.
Safety
Lower or securely block hydraulically operated attachments
and loads before servicing. Do not rely on controls to support
attachments or loads.
Stop the engine and relieve hydraulic pressure to zero
before servicing or disconnecting any part of the hydraulic
system. After stopping the engine, operate the controls in
both directions to relieve pressure.
Before servicing the hydraulic system, attach a warning sign
to the engine start controls to warn other personnel not to
start the engine.
Do not perform hydraulic system maintenance, adjustment,
or repair procedures unless authorized to do so. And then,
make sure all applicable instructions have been read and are
thoroughly understood.
Do not alter specified pressure settings. Higher than
specified pressures can cause structural or hydraulic failure.
Lower than specified pressures can cause loss of control.
Never check for hydraulic leaks with your hands.
Pressurized oil can penetrate the skin, causing serious
injury. Oil escaping from a small hole can be nearly invisible.
Check for leaks with a piece of cardboard or wood.
Storing and Handling Oil
• Store oil drums in a clean, cool, dry location. Avoid
outdoor storage.
• Store oil drums on their side and cover them to prevent
water and dirt from collecting on them.
• When handling drums and transfer containers, use care
to avoid damage which can cause leaks and entry of dirt
or water into the oil.
• Before opening a drum, carefully clean the top of it. Also
clean the faucet or pump to remove oil from the drum.
• Only use clean transfer containers.
• Do not take oil from storage until the oil is needed. If the
oil cannot be used immediately, keep the transfer
container tightly covered.
Storing and Handling Parts
• Store new parts (valves, pumps, motors, hoses, tubes)
in a clean dry indoor location.
• Do not unpack parts or remove port plugs until the parts
are needed.
• Once unpacked, carefully inspect each part for damage
that may have occurred during shipping. Remove all
shipping material from the ports of parts before installing
them.
• Fittings, hoses, and tubes that are not equipped with
shipping caps or plugs must be carefully cleaned before
they are used. Flush the fittings, hoses, and tubes with
clean hydraulic oil, then seal all openings until use at
assembly.
• Do not use rags to plug openings, use clean plastic
shipping plugs and caps.
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