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TM 9-4110-257-14
(2)
Tension.
NOTE
The following procedures apply to fan and compressor V-belts. The belts
must be adjusted together, they cannot be tensioned independently.
(a)
Loosen bolt (2) to relax tension on fan V-belt (4).
(b)
Loosen four bolts (12) several turns.
CAUTION
Too little tension causes slippage or slip and grab, causing the belt to break. If the
belt does not break, the slip will cause excessive cover wear, burn spots and
overheating. Too much tension can cause belt heating and excessive stretch, as
well as damage to drive components, such as sheaves and shafts. Excessive
tightness will also place heavier loads on the bearings causing them to fail
prematurely.
(c)
Turn two bolts (14) equally counterclockwise to set compressor V-belts (15) tension. Belt
tension is correct when 4 lb (2 kg) force is applied to the mid point of the belt and it deflects
0.38 in. (1 cm). When the correct tension is reached, tighten four bolts (12).
(d)
Push on idler arm pulley (24) to set fan V-belt (4) tension. Belt tension is correct when 4 lb
(2 kg) force is applied to the mid point of the belt and it deflects 0.38 in. (1 cm). When the
correct tension is reached, tighten bolt (2).
NOTE
FOLLOW-ON MAINTENANCE:
Close left side condenser door.
Connect battery (para 4-35) and put unit back into service.
4-99
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