TM 5-3895-383-24
V-Belts - Inspect/Adjust/Replace
SMCS Code:
1357-025; 1357-040; 1357-510;
1359-025-BE; 1359-040-BE;
1359-510-BE; 1361-025-BE;
1361-040-BE; 1361-510-BE;
1405-025-BE; 1405-040-BE;
1405-510-BE; 7320-025-BE;
7320-040-BE; 7320-510-BE
Your engine can be equipped with a water pump belt, with a
fan drive belt and with accessory drive belts. Your engine can
also be equipped with an alternator belt. For maximum engine
performance and maximum utilization of your engine, inspect
the belts for wear and for cracking. Check the belt tension.
Adjust the belt tension in order to minimize belt slippage. Belt
slippage will decrease the be life. Belt slippage will also cause
poor performance of the alternator and of any driven
equipment.
If new belts are installed, recheck the belt adjustment after 30
minutes of operation. If two belts or more are required for an
application, replace the belts in belt sets. If only one belt of a
matched set is replaced, the new belt will carry more load.
This is due to the fact that the older belts are stretched. The
additional load on the new belt could cause the new belt to
break.
Illustration 301
Open the engine compartment.
Alternator Belt
Illustration 302
1.
To check the belt tension, apply 110 N (25 lb) of force
midway between the pulleys. Correctly adjusted belts
will deflect 13 to 19 mm (1/2 to 3/4 inch).
2.
In order to adjust the alternator belt, loosen bracket bolt
(1) and mounting bolt (2) on the alternator bracket 3. To
achieve the correct adjustment, move the alternator
inward or move the alternator outward, as required.
4.
If necessary, use a pry bar in the square hole (3) in the
alternator bracket.
5.
Tighten mounting bolt (2) and bracket bolt (1).
NOTE:
The alternator shaft nut must be tightened to a
torque of 50 ± 5 N· m (37 ± 4 Ib-ft).
6.
If new belts are installed, check the belt adjustment
again after 30 minutes of engine operation at the rated
speed.
7.
Check the position of the fan shroud. Adjust the
position of the fan shroud so that the fan will not rub
against the shroud. Maintain a 9.4 mm (0.38 inch)
clearance between the fan and the shroud.
Water Pump Belt
1.
To check the belt tension, apply 110 N (25 lb) of force
midway between the pulleys. Correctly adjusted belts
will deflect 13 to 19 mm (1/2 to 3/4 inch.
Maintenance Section
V-Belts - Inspect/Adjust/Replace
1-123
