ACCESSORY DRIVE
TABLE OF CONTENTS
page page
ACCESSORY DRIVE BELT AND TENSIONER
DIAGNOSIS AND TESTING - ACCESSORY
DRIVE BELT DIAGNOSIS .................3
REMOVAL .............................4
INSPECTION ...........................4
INSTALLATION ..........................5
ACCESSORY DRIVE BELT AND
TENSIONER
DIAGNOSIS AND TESTING - ACCESSORY DRIVE BELT DIAGNOSIS
CONDITION POSSIBLE CAUSE CORRECTION
BELT SLIPPAGE 1. Belt slipping because of insuffi-
cient tension.
1. Replace the automatic belt ten-
sioner.
2. Belt excessively glazed or hard-
ened from heat and excessive slip-
page.
2. Replace belt.
3. Incorrect belt. 3. Replace belt.
4. Driven component bearing fail-
ure.
4. Replace faulty component.
5. Belt or pulley subjected to sub-
stance (belt dressing, oil, ethylene
glycol) that has reduced friction.
5. Replace belt and clean pulleys.
BELT NOISE (OBJECTIONABLE
SQUEAL, SQUEAK, OR RUMBLE)
1. Belt slippage. 1. Replace belt or automatic belt
tensioner.
2. Foreign material imbedded in
belt.
2. Replace belt.
3. Non-uniform belt. 3. Replace belt.
4. Misaligned pulley(s). 4. Align accessories.
5. Non-uniform groove or eccentric
pulley.
5. Replace pulley(s).
6. Bearing noise. 6. Locate and repair.
BELT ROLLED OVER IN GROOVE
OR BELT JUMPS OFF
1. Broken cord in belt. 1. Replace belt.
2. Belt tension too loose, or too
tight.
2. Replace the automatic belt ten-
sioner.
3. Misaligned pulleys. 3. Align accessories.
4. Non-uniform grooves or eccen-
tric pulley.
4. Replace pulley(s).
5. Foreign object(s) in grooves. 5. Remove foreign objects in
groove.
ZB ACCESSORY DRIVE 7 - 3
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