CONDITION POSSIBLE CAUSES CORRECTION
LONGITUDAL BELT CRACKING 1. Belt has mistracked from pulley
groove
1. Replace belt
2. Pulley groove tip has worn
away rubber to tensile member
2. Replace belt
$GROOVE JUMPING”
(Belt does not maintain correct po-
sition on pulley)
1. Incorrect belt tension 1. Inspect/Replace tensioner if nec-
essary
2. Pulley(s) not within design toler-
ance
2. Replace pulley(s)
3. Foreign object(s) in grooves 3. Remove foreign objects from
grooves
4. Pulley misalignment 4. Align component
5. Belt cordline is broken 5. Replace belt
BELT BROKEN
(Note: Identify and correct problem
before new belt is installed)
1. Incorrect belt tension 1. Replace Inspect/Replace ten-
sioner if necessary
2. Tensile member damaged dur-
ing belt installation
2. Replace belt
3. Severe misalignment 3. Align pulley(s)
4. Bracket, pulley, or bearing fail-
ure
4. Replace defective component
and belt
NOISE (Objectional squeal,
squeek, or rumble is heard or felt
while drive belt is in operation)
1. Incorrect belt tension 1. Inspect/Replace tensioner if nec-
essary
2. Bearing noise 2. Locate and repair
3. Belt misalignment 3. Align belt/pulley(s)
4. Belt to pulley mismatch 4. Install correct belt
5. Driven component induced vi-
bration
5. Locate defective driven compo-
nent and repair
6. System resonent frequency in-
duced vibration
6. Vary belt tension within specifi-
cations
TENSION SHEETING FABRIC
FAILURE
(Woven fabric on outside, circum-
ference of belt has cracked or sep-
arated from body of belt)
1. Tension sheeting contacting sta-
tionary object
1. Correct rubbing condition
2. Excessive heat causing woven
fabric to age
2. Replace belt
3. Tension sheeting splice has
fractured
3. Replace belt
CORD EDGE FAILURE
(Tensile member exposed at edges
of belt or separated from belt body)
1. Incorrect belt tension 1. Inspect/Replace tensioner if nec-
essary
2. Belt contacting stationary object 2. Replace belt
3. Pulley(s) out of tolerance 3. Replace pulley
4. Insufficient adhesion between
tensile member and rubber matrix
4. Replace belt
VA ACCESSORY DRIVE 7 - 7
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