Maeda MC405C-3 - Replace Hydraulic Oil Return Filter

Section 5 – PERIODIC MAINTENANCE Mini-Crawler Crane M A E D A
5-48 1/2019 MC405C-3
Replace Hydraulic Oil Return Filter
WARNING!
• All the parts will be at elevated
temperatures immediately after engine
operation, which urges you not to replace
the filter. Always perform replacement with
the engine cold.
• Potential gush of oil may occur upon
removing the filler cap of the hydraulic oil
tank.
Be sure to relieve internal pressure by
slowly rotating the filler cap before cap
removal.
• Make sure the filler cap is closed properly
after replenishment of the oil.
Potential fall of the filler cap during
operation may occur if disregarded, which
could cause boiling oil to gush that results
in burns.
CAUTION:
• For more information on the which oil to be
used, see "LUBRICATING OIL" on page 5-
14.
• Place the machine in travel position for oil
quantity inspection.
Oil quantity inspection with the machine in
working position may deceive your eyes to
deem the quantity of oil low. Owing to
improper judgment, the oil may be supplied
at an excessive amount.
• The engine must be at halt until piping and
hydraulic equipment is filled with oil after
replacement of the hydraulic oil filter.
• Oil replenished should remain below "H"
(upper limit) on the level gauge. Excessive
oil replenishment may cause the oil to gush
from the air breather during machine
travelling and crane operation, which could
result in burns.
• Keep impurities out of the filler cap when
replenishing oil.
1. Place the machine on a level surface.
2. Remove the machinery cover as described
in "Removing Machinery Cover" on page 5-
18.
3. Turn the filter cartridge (3) counterclockwise
(left) with the use of the filter wrench to
remove it.
4. Clean the filter stand. Apply clean engine oil
(or a light coating of grease) to the gasket
and thread part of a new filter cartridge (3),
and attach the filter cartridge.
Fig. 5-99
NOTICE: With the gasket surface maintained
contact with the sealing surface of the filter stand,
rotate the filter cartridge one-half to three-
quarters of a turn to secure it.
Always give manual tightening to the filter
cartridge.
5. Check around the filter cartridge (3) for oil
leaks. Be sure to wipe off oil completely if
spilled.
6. See "Pre-Start Inspection - Before Starting
Engine" on page 5-24 to check the oil level
in the hydraulic oil tank.
Prompt oil refilling is required if check finds
insufficient oil.
7. Install the inspection cover (2), and secure it
with the four mounting bolts (1).
8. Reattach the machinery cover as described
in "Installing Machinery Cover" on page 5-
18.