Section 5 – PERIODIC MAINTENANCE
Mini-Crawler Crane M A E D A
5-48 1/2019 MC285C-3
a. Start the engine only after piping and
hydraulic equipment are filled with the oil.
After engine start, continue to run the
engine at low idle for 10 minutes.
b. While keeping the engine speed low,
slightly operate each crane control lever to
operate each cylinder and winch motor
slowly.
Do not operate the boom hoisting cylinder
and telescopic boom cylinder to the stroke
end, but stop them at a position
approximately 100 mm before the stroke
end.
Repeat this 4 to 5 times.
c. Extend the outriggers and make the
outrigger cylinders telescope in the
condition that the machine does not float.
When making the outrigger cylinder
telescope, do not operate it to the stroke
end, but stop it at a position approximately
4 in. (100 mm) before the stroke end.
Repeat this 4 to 5 times.
Replace Oil in Slewing Reduction
Gearcase
WARNING! The drain plug of the slewing
reduction gearcase is located directly
underneath the machine.
To drain oil, use outriggers to raise the rubber
track about 80 mm, allowing access under the
machine. If the machine becomes unstable
and wobbles, insert supports under the front
and back of the machine to gain stability.
CAUTION: See “LUBRICATING OIL” on page
5-10 for the oil to be used.
CAUTION: Use seal tape, etc. at the thread of
the drain plug and filler plug to stop the oil
leak and securely tighten the plugs after
changing the oil.
• Oil drain pan: Prepare a container of at least 1 L.
• Oil replacement quantity in slewing reduction
gearcase: 0.6 L
1． Place the machine on a level surface.
2. See “OUTRIGGER SETTING” on page 4-38
to set outriggers and raise the machine about
80 mm above the ground.
3. Place a drain pan directly underneath the
drain plug (P) of the slewing reduction
gearcase to receive drained oil.
Fig. 5-84
4. Turn the drain plug slowly to avoid splashing
oil on yourself, and drain oil.
5. Check the drained oil and if it contains an
unacceptable amount of metal particles or
foreign matter, contact our sales service
agency.
6. Install a drain plug.
7. See "OUTRIGGER STOWING" on page 4-48
to stow the outriggers.
8. See “Removing Machinery Cover” on page
5-14 and remove the machinery cover.
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