Komatsu H75051 Operation & Maintenance Manual page 362

MAINTENANCE PROCEDURE
2.
Check air conditioner compressor belt.
Press the middle point between air conditioner compressor
pulley (2) and drive pulley (3) with your thumb (approxi-
mately 98 N {10 kg}).
If deflection (a) is 11 to 15 mm, the belt tension is normal.
If the deflection is out of the standard range, adjust it into
the standard range.
When you use a belt tension gauge, the tension is normal
if it is in the range of 353 to 530 N {36 to 54 kg}.
METHOD FOR TESTING WHEN AIR CONDITIONER COMPRESSOR BELT IS RE-
PLACED
Press the middle point between the compressor pulley and crankshaft pulley with your thumb (approximately
98 N {10 kg} ).
The standard deflection is 8 to 11.5 mm.
When you use a belt tension gauge, the tension is normal if it is in the range of 530 to 745 N {54 to 76 kg} .
REMARK
When the belt is replaced with a new one, the above value is employed as the initial tension since a stronger
tension is required.
METHOD FOR ADJUSTING AIR CONDITIONER COMPRESSOR BELT
1.
Open the engine side cover (1) on the right side of the ma-
chine.
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MAINTENANCE