Maeda MC405C-3 - Radiator and Oil Cooler Fin Inspection;Cleaning; Check; Adjust Belt Tension

Section 5 – PERIODIC MAINTENANCE Mini-Crawler Crane M A E D A
5-44 1/2019 MC405C-3
Maintenance Every 250 Hours
Perform this maintenance in tandem with
maintenance every 50/100 hours.
Radiator and Oil Cooler Fin
Inspection/Cleaning
WARNING! Note dust and debris hazards
when using compressed air. Always wear
protective goggles and a mask.
CAUTION:
• To avoid damaging the fins when cleaning
with compressed air, use compressed air at
a pressure of approximately 0. 20 to 0. 29
MPa (2 to 3 kg/cm
2
) and blow from a safe
distance from the fins.
Damage to the fins may result in water leaks
and overheating.
• In dusty locations, inspect the fins daily and
clean when necessary.
1. Position the machine on a level surface.
2. Remove the machinery cover as described
in "Removing Machinery Cover" on page 5-
18.
3. Apply compressed air (0. 20 to 0. 29 MPa (2
to 3 kg/cm
2
) to the oil cooler (3) and radiator
(4) to dislodge any dirt or debris clogging the
fins.
Fig. 5-89
4. After cleaning, reattach the machinery cover
as described in "Installing Machinery Cover"
on page 5-18.
Check / Adjust Belt Tension
Tension Check
1. Remove the machinery cover as described
in "Removing Machinery Cover" on page 5-
18.
2. With the fingers, push (by approximately 98
N {10kgf}) the midpoint between the fan
pulley (2) and alternator pulley (1) of the belt
(3), and if the strain is between 10 and 12
mm it is within standard.
Fig. 5-90
3. If the inspection result indicated that the
strain of the belt (3) is out of the standard
value range, see the Tension check section
and adjust the tension of the belt (3).
Fig. 5-91
NOTICE: Inspect the followings as well when you
inspect the tension of the fan belt.
• Check the pulleys for breakage, the V groove
and belt for wear. Ensure that the belt is not in
contact with the bottom of the V groove.
• Prompt belt replacement is required if belt
adjustment is no longer enabled due to a
stretched belt or if the belt is scratched or
cracked.
• At least 5 minute long test run is required after
belt replacement. Re-adjust the belt tension
upon completion of test run.