Section 5 – PERIODIC MAINTENANCE
Mini-Crawler Crane M A E D A
5-46 3/2019 MC305C-3
Maintenance Every 500 Hours
Perform this maintenance in tandem with
maintenance every 50/250 hours.
Replace Fuel Filter Cartridge
WARNING!
• Keep from heat and flame, including
cigarettes, when replacing the fuel filter
element.
• All the parts will be at elevated temperatures
immediately after engine operation, which
urges you not to replace the fuel filter
element. Always perform replacement with
the engine cold to touch.
1. Place the machine on a level surface.
2. Open the access hatch in the right-hand
machinery cover.
3. Raise the lever (2) of the head (4) section to
horizontal position (close) to shut off the fuel.
Fig. 5-77
Fig. 5-78
4. Turn the retainer ring (3) of the head (4)
section counterclockwise (left) to loosen, then
remove the pot (1) from the head (4) section.
5. Drain the fuel and water out of the pot (1).
6. Clean the pot (1) and element with diesel,
and spray the compressed air (0.20 to 0.29
MPa {2 to 3 kg/cm
2
}) inside to scrape off the
dusts from the surface.
7. Set the pot (1) to the head (4) section, then
turn the retainer ring (3) clockwise (right) to
tighten.
8. Lower the fuel lever (2) of the head (4)
section down to the vertical position (open) to
open the fuel circuit.
9. Close the access hatch.
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:
• See "LUBRICATING OIL" on page 5-14 for
which oil to be used.
• 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. See "OUTRIGGER SETTING" on page 4-36
and rotate the outriggers outward.
3. See "Removing Machinery Cover" on page
5-18 and remove the machinery cover.
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