M A E D A Mini-Crawler Crane Section 5 – PERIODIC MAINTENANCE
1/2019 MC285C-3 5-47
Replace Oil in Hydraulic Oil Tank
WARNING! Various parts are at elevated
temperatures immediately after engine
operation.
Do not change the oil immediately. Wait until
the oil is cooled.
WARNING! The oil may spout out when the
filler cap of the hydraulic oil tank is removed.
Loosen the filler cap mounting bolts so that
the filler cap is raised a little to allow the
release of inner pressure, then remove the
mounting bolts and the filler cap.
WARNING! Securely tighten mounting bolts of
the oil filler cap after refilling the oil.
If the mounting bolts are loose the filler cap
may come off during the operation, and the
hot oil may spout out of the pan, causing
burns.
CAUTION: See “LUBRICATING OIL” on page
5-10 for the oil to be used.
CAUTION: Be sure to put the machine in the
travelling posture when checking the oil level.
If you check the oil level in the working
posture, you judge the oil level to be low and
feed the oil excessively.
CAUTION: After replacing the hydraulic oil, do
not start the engine for a while until piping and
hydraulic equipment are filled with the oil.
CAUTION: Avoid the oil exceeding the level
point (red point) of the level gauge.
When the oil goes beyond the correct level, it
may spout out from the air breather during
travelling or crane operation.
Be careful not to let any foreign substance go
into the filler opening when refilling the oil.
• Oil drain pan: Prepare a container of at least
25 L.
• Quantity of oil in hydraulic oil tank for
replacement: 20 L
1. Place the machine on a level surface.
2. See “TRAVELLING POSITION” on page 4-24
and put the machine in the “Travelling
posture”.
3. See “Removing Machinery Cover” on page
5-14 and remove the machinery cover.
4. Remove the filler cap (F) by removing the
mounting bolts (1) (4 bolts) at the top of the
hydraulic oil tank.
Fig. 5-81
5. Place a drain pan directly underneath the
drain port cap (P) to receive drained oil.
Fig. 5-82
6. Remove the drain port cap slowly to drain the
oil, keeping from contact with draining oil.
7. Check the drained oil and if it contains an
unacceptable amount of metal particles or
foreign matter, contact our sales service
agency.
8. Install the drain port cap.
9. Feed hydraulic oil through the filler port to the
level point (red dot) while looking at the oil
level gauge.
Fig. 5-83
10. After refilling the oil, set the filler cap and
tighten the mounting bolts (4 bolts) securely.
11. See “Installing Machinery Cover” on page
5-14 and install the machinery cover.
12. Bleed the air according to the following
sequence.
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