Komatsu PC22MR-3, Руководство по эксплуатации и техническому обслуживанию

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MAINTENANCE
MAINTENANCE PROCEDURES
4-57
CHECKING AND ADJUSTING THE FAN BELT TENSION 4
WARNING
q
Soon after the machine has been stopped the engine is very hot and may cause burns; let the engine
cool down to 40-45°C before carrying out any check.
q
To carry out this maintenance operation it is necessary to tilt the cab floor. Carefully follow the
instructions given in paragraph "TILTING THE CAB FLOOR (3-35)" or have this operation carried out
by your Komatsu distributor.
Checking the cartridge
The fan belt can be reached after tilting the cab floor (see
"TILTING THE CAB FLOOR (3-35)").
1. The check is manual: press the belt with a thumb on the
intermediate point between the drive shaft pulley and the
fan pulley with a force equal to 98 Nm (10 kg); the resulting
deflection must be approximately 9-13 mm.
2. If the deflection exceeds this value, adjust by proceeding
as indicated below.
NOTICE
Guards are installed in the area of the engine to protect
personnel from moving parts. These guards should only
be removed by a Komatsu service engineer unless
specific instructions are given in this manual.
Adjustment
1. Loosen the adjusting screw (2) and the alternator fastening
screws (3).
2. With a lever inserted between the alternator (1) and the
engine block, make the alternator slide.
3. Lock the adjusting screws and the alternator fastening
screws, then check again.
NOTICE
If the belt is worn, change it and check the tension again
after a few hours of operation.
WEAM014500