C - EVERY 250 HOURS SERVICE
Carry out the operations described previously as well as the following operations.
C1 - FAN BELT TENSION
CHECK - ADJUST
- Open the I.C. engine bonnet.
- Check the belt for signs of wear and cracks and change if necessary (see: 3 -
MAINTENANCE: FILTERS CARTRIDGES AND BELTS).
- Loosen screw 1 (fig. C1/1) on the tension pulley.
- Loosen lock nut 2 (fig. C1/1 and C1/2) and screw 3 (fig. C1/1 and C1/2).
- Bring the belt just into contact with pulley 4 (fig. C1/1) (on the lift truck, check this
operation by feel).
- Make a mark on the head of screw 3 (fig. C1/1 and C1/2) and tighten, turning it 5 times.
- Tighten the lock nut 2 (fig. C1/1 and C1/2).
- Retighten screw 1 (fig. C1/1) on the tension pulley.
When changing the fanbelt, tighten screw 3 (fig. C1/1 and C1/2) by one and a half turns,
having allowed the I.C. engine to idle for 30 minutes.
C2 - ALTERNATOR/CRANKSHAFT BELT TENSION
CHECK - ADJUST
- Open the I.C. engine bonnet.
- Unscrew the fastening screws 1 (fig. C2/1).
- Lay down the protective guard 2 (fig. C2/1).
- Check the belt for signs of wear and cracks and change if necessary (see: 3 -
MAINTENANCE: FILTERS CARTRIDGES AND BELTS).
- Check the belt tension between the pulleys of the crankshaft and of the alternator.
- Under a normal pressure exerted with the thumb (10 ft/lb), the tension should be
approximately 3/8 in.
- Carry out adjustments if necessary.
- Untighten screws 3 (fig. C2/2) by two to three thread turns.
- Swivel the alternator assembly so as to obtain the belt tension required.
- Retighten screws 3 (fig. C2/2) (tightening torque 16 ft/lb).
- Put the protective guard back 2 (fig. C2/1).
If the alternator belt has to be changed, check the tension again after the first 20 hours of
operation.
C1/1
C1/2
C2/2
1
2
3
4
2
3
3
3
C2/1
1
1
2
1
3 - 20
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