Serpentine Drive Belt Diagnosis - Jeep Wrangler 1997 Manual

7 -10 COOLING SYSTEM
DIAGNOSIS AND TESTING (Continued)
SERPENTINE DRIVE BELT DIAGNOSIS
TJ
CONDITION
POSSIBLE CAUSES
CORRECTION
RIB CHUNKING (ONE
OR MORE RIBS HAS
SEPARATED FROM
BELT BODY
RIB OR BELT WEAR
LONGITUDINAL BELT
CRACKING (CRACKS
BETWEEN TWO RIBS)
BELT SLIPS
"GROOVE JUMPING"
(BELT DOES NOT
MAINTAIN CORRECT
POSITION ON PULLEY)
BELT BROKEN (NOTE :
IDENTIFY AND
CORRECT PROBLEM
BEFORE NEW BELT
IS INSTALLED)
1 . Foreign objects imbedded in
pulley
grooves.
2 . Installation damage .
1 . Remove foreign objects from pulley
grooves. Replace belt .
2. Replace belt.
1 . Pulley(s) misaligned .
2 . Abrasive environment.
3. Rusted pulley(s).
4 . Sharp or jagged pulley
groove tips.
5. Rubber deteriorated .
1 . Belt has mistracked from
pulley groove.
2 . Pulley groove tip has worn
away rubber to tensile
member .
1 . Belt slipping because of
insufficient tension .
2 . Belt or pulley subjected to
substance (belt dressing, oil,
ethylene glycol) that has
reduced friction .
3. Driven component bearing
failure.
4. Belt glazed and hardened
from heat and excessive
slippage .
1 . Belt tension either too high or
too low.
2. Pulley(s) not within design
tolerance .
3. Foreign object(s) in grooves.
4. Pulley misalignment .
5. Belt cordline is broken .
1 . Excessive tension .
2. Tensile member damaged
during belt installation .
3. Severe misalignment .
4. Bracket, pulley, or bearing
failure .
NOISE (OBJECTIONAL
SQUEAL, SQUEAK, OR
RUMBLE IS HEARD OR
FELT WHILE DRIVE
BELT IS IN OPERATION)
1 . Belt slippage.
2. Bearing noise .
3. Belt misalignment .
4. Belie-to-pulley mismatch .
1 . Align pulley(s) .
2. Clean pulley(s) . Replace belt if necessary .
3. Clean rust from pulley(s) .
4. Replace pulley.
5. Replace belt .
1 . Replace belt .
2. Replace belt.
1 . Adjust tension .
2. Replace belt and clean pulleys .
3. Replace faulty component bearing .
5. Replace belt.
1 . Adjust belt tension .
2. Replace pulley(s) .
3. Remove foreign objects from grooves .
4. Align component .
5. Replace belt.
1. Replace belt and adjust tension to
specification .
2. Replace belt .
3. Align pulley(s) .
4. Replace defective component and belt .
1 . Adjust belt.
2. Locate and repair.
3. Align belt/pulley(s) .
4. Install correct belt .
J9507- 25