Check Air Conditioner Compressor Belt Tension, Adjust - Komatsu ecot3 HD325-7 Operation & Maintenance Manual

MAINTENANCE

CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST

CHECKING
Press the middle of the belt between the air conditioner
compressor pulley (1) and drive pulley (2) with the thumb (about
58.8 N {6 kg}).
If deflection (A) is 10 mm (0.4 in), the belt tension is normal.
ADJUSTING
1. Loosen bolt (1).
2. Turn nut (2) to adjust so that the belt deflects by approx. 10 mm
(0.4 in) when pressed with a finger force of approx. 58.8 N (6
kg) at a point midway between the air conditioner compressor
pulley and drive pulley.
3. Tighten bolt (1) and nut (2) to secure the compressor in
position.
4. Check each pulley for damage, wear of the V-groove, and wear
of the V-belt. In particular, be sure to check that the V-belt is not
touching the bottom of the V-groove.
5. If the V-belt is so lengthened that it cannot be adjusted any
more or if it has any cuts or cracks, replace it.
6. If the V-belt has been replaced with a new part, there will be initial elongation, so adjust the belt again after
operating for 2 to 3 days.
SERVICE PROCEDURE
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