Komatsu PC350LC-8, Operation & Maintenance Manual

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MAINTENANCE
MAINTENANCE PROCEDURE
4-53
CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST 4
Checking
The deflection of the belt should be 6 to 9 mm when pressed
with a finger force of approx. 58.8N (6 kgf) at mid-point (C)
between the crankshaft pulley (B) and the compressor pulley
(A).
Adjustment
1. Remove guard (1).
2. Loosen bolts (2) and (3), then move compressor (4) to
adjust.
REMARK
When the bolts (2) and (3) are loosened, compressor (4) can
move, using the mounting position of bolt (2) as a fulcrum.
3. When the position of the compressor is determined, tighten
bolts (2) and (3) to hold it in position.
NOTICE
q
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.
q
In case any of the following occurs, ask the Komatsu distributor in your territory to replace the belts
with new ones.
〈
The fan belt has elongated, leaving little allowance for adjustment.
〈
A cut or crack is found on the belt.
〈
Slipping or creaking sound is heard coming from the belt.
q
When the new V-belt is set, readjust it after one hour of operation.