Komatsu PC80MR-5E0, Operation & Maintenance Manual

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3.
Check the belt tension of air conditioner compressor.
Press the belt with a finger at a point midway between idle
pulley (3) and compressor (4). (approximately 58.8 N {ap-
proximately 6.0 kg} )
If deflection (a) is in the standard range (5 to 6 mm), the air
conditioner compressor belt tension is correct.
If deflection (a) is out of the standard range, adjust it according to the following procedure.
1) Loosen the nut (6).
2) Adjust it with adjustment nut (6) of idle pulley (3).
3) Tighten the nut (5) to fix the idle pulley (3).
4) Check the belt tension of air conditioner compressor
again.
If the tension is not correct, adjust it again.
5) Check each pulley for breakage and wear of the V-
groove and check the V-belts for wear.
In particular, check carefully that the V-belt is not in
contact with the V-groove bottom.
If the V-belt is stretched and has no allowance for ad-
justment, or has slipping sound or squeak because of
cuts or cracks of the belt, ask your Komatsu distributor
to replace it.
When the new V-belt is installed, readjust it after oper-
ating for 1 hour.
4.
Remove cover support lever (2) and fix it to the lever lock
securely.
5.
Close engine hood (1).
EVERY 500 HOURS MAINTENANCE
Maintenance for every 100 and 250 hours should be performed at the same time.
METHOD FOR CHANGING OIL IN ENGINE OIL PAN, REPLACING ENGINE OIL
FILTER CARTRIDGE
k k
WARNING
Immediately after the engine is stopped, its parts and oil are still very hot, and may cause burn injury.
Wait for the temperature to go down, and then start the work.
RKA68920
RKA68940
RKA68930
MAINTENANCE MAINTENANCE PROCEDURE
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