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[4] CHECKING/ADJUSTING COOLING FAN BELT TENSION
[CHECKING]
1. Open the engine hood (1) and remove step (7).
2. Deflection (a) should be 7 to 10 mm when the belt is pressed with the thumb with a force of approx. 58.8
N (6 kg) at a point midway between the alternator pulley and fan pulley.
[ADJUSTMENT]
1. Remove 2 covers (1) between the hydraulic tank and operator’s
cab.
2. Loosen mounting bolt (3) of alternator (2).
3. Loosen alternator lock bolt (4).
4. Turn tension bolt (5) of alternator (2) in the direction to loosen it,
and adjust so that the belt tension is 7 to 10 mm (approx. 58.8 N
(6 kg)). When doing this, do not touch double nut (6).
5. Tighten mounting bolt (3) and lock bolt (4).
6. Install step (7) and close cover (1).
Inspect the followings as well when you inspect the tension of the fan belt.
• 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.
• If the belt is stretched and there is no allowance for adjustment, or if it is cut or cracked, please contact
us or our sales service agency for replacement.
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