Check Air Conditioner Compressor Belt Tension, Adjust - Komatsu PC308USLC-3E0 Operation & Maintenance Manual

MAINTENANCE PROCEDURE

CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST

Checking
Press the belt at a point midway between the drive pulley (B) and
compressor pulley (A) with a finger force of approx. 60 N (6.1 kg)
(C) and check that the deflection is 6 to 9 mm (0.20 in to 0.40 in).
Adjustment
1. Open engine hood.
2. Remove guard (1).
3. 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.
4. When the position of the compressor is determined, tighten
bolts (2) and (3) to hold it in position.
NOTICE
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.
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.
When the new V-belt is set, readjust it after one hour of operation.
4 - 44
MAINTENANCE