Belt Diagnosis; Serpentine Belt Wear Patterns - Jeep 200 Cherokee Service Manual

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DIAGNOSIS AND TESTING (Continued)

BELT DIAGNOSIS

When diagnosing serpentine accessory drive belts,
small cracks that run across the ribbed surface of the
belt from rib to rib (Fig. 13), are considered normal.
These are not a reason to replace the belt. However,
cracks running along a rib (not across) are not nor-
mal. Any belt with cracks running along a rib must
be replaced (Fig. 13). Also replace the belt if it has
excessive wear, frayed cords or severe glazing.
Refer to the Serpentine Drive Belt Diagnosis chart
for further belt diagnosis.
CONDITION
RIB CHUNKING (ONE OR MORE
RIBS HAS SEPARATED FROM
BELT BODY
RIB OR BELT WEAR
LONGITUDINAL BELT CRACKING
(CRACKS BETWEEN TWO RIBS)
2000 JEEP CHEROKEE
1 – NORMAL CRACKS BELT OK
2 – NOT NORMAL CRACKS RELACE BELT
POSSIBLE CAUSES
1. Foreign objects imbedded in
pulley grooves.
2. Installation damage.
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
COOLING SYSTEM
Fig. 13 Serpentine Belt Wear Patterns
CORRECTION
1. Remove foreign objects from
pulley grooves. Replace belt.
2. Replace belt.
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.
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