Inspect And Adjust Cooling Fan Belt Tension - Komatsu PC15MRX-1 Operation And Maintenance Manual

MAINTENANCE PROCEDURE

INSPECT AND ADJUST COOLING FAN BELT TENSION

Inspection
The belt should deflect 10 to 15mm (0.4 to 0.6 in) when press
with (A) finger force of approx. 58.8N (6kg, 13.2 lb) at a point
midway between alternator pulley and fan pulley.
Adjustment
Prepare a pinch bar
Prepare a wooden block
1. Tip the operator's seat over to the front, then remove the
toolbox from under the seat. For details, see "TIPPING
OPERATOR'S SEAT (PAGE 3-20)".
2. Remove 4 bolts (4) from the panel under the operator's
seat, then remove the cover.
3. Insert a bar between alternator (1) and the cylinder block
to fix alternator (1) in position. When fixing alternator (1)
in position, insert a wooden block between the bar and
alternator (1) to prevent damage to the alternator.
4. Loosen bolts and nuts (2), (3) and (4).
5. Move alternator (1) with a bar so that the deflection of the
belt is 10 to 15 mm (0.4 to 0.6 in) (approx. 6 kg (13 lb)).
6. Tighten the bolts and nuts (2), (3) and (4) to fix alternator
(1) in position.
7. 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 the V-groove.
8. If the belt is stretched, leaving no allowance for adjust-
ment, or if it is cut or cracked, contact your Komatsu dis-
tributor for replacement.
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MAINTENANCE