MAINTENANCE PLAN
164
4.7.8 MAINTENANCE AFTER THE FIRST 250 HOURS OF OPERATION
4.7.9 MAINTENANCE EVERY 250 HOURS OF OPERATION
4.7.9.a ADJUSTING THE FAN BELT TENSION
These maintenance operations must be carried out after the first 250 hours of operation, together with those to be
carried out “EVERY 250 HOURS”.
• CHANGE THE OIL IN THE TRAVEL REDUCTION GEARS
• CHANGE THE OIL IN THE SWING REDUCTION GEAR
• CHANGE THE HYDRAULIC OIL DRAIN FILTER
• CHECK AND ADJUST THE ENGINE VALVE CLEARANCE
For details on the various maintenance operations, see the sections “4.7.11 MAINTENANCE EVERY 500
HOURS” and “4.7.13 MAINTENANCE EVERY 2000 HOURS”.
For the inspection and adjustment, contact your Komatsu Utility Dealer.
The fan belt can be reached from the upper side of the fixed cov-
er, after removing the panel (1).
Use 13 and 17 mm spanners.
The check is manual: press the belt (2) with your thumb on the in-
dicated point with a force equal to approx. 10 kg; the resulting de-
flection must be approximately 10-15 mm.
If the deflection exceeds this value, loosen the screw (3) that fas-
tens the alternator (4) and, with a lever inserted between the en-
gine block and casing, make the alternator slide.
Lock the screw (3) and check again.
Use a 12 mm spanner.
A - Fan pulley
B - Driving shaft pulley
C - Alternator pulley
• If the belt is worn, change it and check the tension again af-
ter a few hours of operation.
RYA16140
1
RWAA0150
3
4
RWAA0140
2
4
RWA09220
10 ÷ 15 mm
A
C
B
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