Section 5 –
GENERAL MAINTENANCE INFORMATION AND PRECAUTIONS
Mini-Crawler Crane M A E D A
5-4 9/2020 MC285CB-3
Handling and Service of Hydraulic
Oil and Filters
WARNING! The following safety messages
address a potential Fire Hazard:
• Keep heat, flames and cigarettes away from
hydraulic oil.
• Clean hydraulic oil spills immediately.
• Stop the machine before replacing the
hydraulic oil.
• Allow the hydraulic oil to cool to a
temperature allowing the hydraulic oil tank
surface to be touched before replacing the
oil and filters.
WARNING! Exposure Hazard. Avoid skin
contact with the hydraulic oil. If your skin is
penetrated by high-pressure hydraulic oil,
seek medical attention immediately. Any fluid
injected under the skin must be removed
surgically or gangrene may result.
WARNING! The following safety messages
address a potential Burn Hazard:
• Relieve internal pressure by slowly rotating
the hydraulic tank air breather cap during
removal.
• Make sure the hydraulic tank air breather
cap is closed properly after replenishment of
the oil.
• When filling the hydraulic oil tank, do not fill
above the upper limit on the level gauge.
Overfilling may cause oil to gush from the
tank during machine operation.
For oil type and usage specifications, see
“LUBRICATING OIL” on page 5-7.
Secure the hydraulic oil fill and drain plugs after oil
replacement. Use seal tape on the threads to
prevent leaks.
Place the machine on a flat, level surface in the
TRAVEL position when replacing or checking the
oil.
Do not start the machine until the hydraulic
system is completely filled with oil.
Prevent contaminants from entering the oil or oil
system.
Inspect O-rings for damage when removing
high-pressure hoses. Replace as necessary.
Bleed the residual air from the hydraulic system
after performing any of the following:
• Replacement or cleaning of hydraulic oil filters
or strainers
• Repair or replacement of hydraulic components
including hoses and piping
Hydraulic oil filters:
NOTICE: Never reuse a cartridge-type hydraulic
oil filter under any circumstance.
• Replace the hydraulic filters after draining the
hydraulic oil tank or replacing a hydraulic system
component.
• After replacing a hydraulic oil filter, check the
used filter for debris and metal shavings. If metal
shavings are present, contact us or our sales
service agency.
• Unpack a replacement hydraulic oil filter
immediately before use.
• Always use Maeda genuine hydraulic oil filters.
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