Komatsu PC2000-8 BACKHOE, Operation & Maintenance Manual, Page: 389 / 504

MAINTENANCE
MAINTENANCE PROCEDURE
4-71
2. The deflection should be approx. 6 mm (0.24 inch) when a
point midway between the drive pulley and the air condi-
tioner compressor pulley is pressed with a finger force of
approx. 58.8 N {approx. 6 kg}.
A: Compressor pulley
B: Drive pulley
Adjustment
1. Loosen bolts and nuts (6) - (9) in number order and move
the compressor.
q
If nut (10) is tightened, the belt tension is increased; if
nut (10) is loosened, the belt tension is reduced.
2. After adjusting the belt, tighten bolts and nuts (6) - (9) in the
reverse order (from (9) to (6)). Finally, tighten nut (10).
q
Check each pulley for damage, wear of the V-groove,
and wear of the V-belt. In particular, check if the V-belt
is in contact with the bottom of the V-groove.
q
If the belt is elongated and there is no more margin for
adjustment, or if it is cut or cracked, replace the belt.
3. Install cover (3).