Jeep J-10 Series 1982 Technical & Service Manual page 202

1C-28 COOLING SYSTEMS
Serpentine Drive Belt Diagnosis
Condition Possible Cause
Correction
TENSION SHEETING
FABRIC FAILURE
(WOVEN FABRIC ON
OUTSIDE CIRCUM
FERENCE OF BELT
HAS CRACKED OR
SEPARATED FROM
BODY OF BELT)
(1)
(2)
(3)
Grooved or backside idler pulley
diameters are less than minimum
recommended.
Tension sheeting contacting
stationary object.
Excessive heat causing woven
fabric to age.
(1)
(2)
(3)
Replace pulley(s) not conforming
to specification.
Correct rubbing condition.
Replace belt.
(4) Tension sheeting splice has
fractured.
(4)
Replace belt.
NOISE
(OBJECTIONAL
SQUEAL, SQUEAK,
OR RUMBLE IS
HEARD OR FELT
WHILE DRIVE BELT
IS IN OPERATION)
(1)
(2)
(3)
(4)
Belt slippage.
Bearing noise.
Belt misalignment.
Belt-to-pulley mismatch.
(1)
(2)
(3)
(4)
Adjust belt.
Locate and repair.
Align belt/pulley(s).
Install correct belt.
NOISE
(OBJECTIONAL
SQUEAL, SQUEAK,
OR RUMBLE IS
HEARD OR FELT
WHILE DRIVE BELT
IS IN OPERATION)
(Continued)
(5)
(6)
Driven component induced
vibration.
System resonant frequency
induced vibration.
(5)
(6)
Locate defective driven component
and repair.
Vary belt tension within
specifications. Replace belt.
RIB CHUNKING
(ONE OR MORE RIBS
HAS SEPARATED
FROM BELT BODY)
(1)
(2)
Foreign objects imbedded in
pulley grooves.
Installation damage.
(1)
(2)
Remove foreign objects from
pulley grooves.
Replace belt.
(3)
Drive loads in excess of design
specifications.
(3)
Adjust belt tension.
(4) Insufficient internal belt adhesion. (4)
Replace belt.
RIB OR BELT WEAR
(BELT RIBS CONTACT
BOTTOM OF PULLEY
GROOVES)
(1)
(2)
Pulley(s) misaligned.
Mismatch of belt and pulley
groove widths.
(1)
(2)
Align pulley(s).
Replace belt.
(3) Abrasive environment.
(3)
Replace belt.
(4)
Rusted pulley(s).
(4)
Clean rust from pulley(s).
(5)
Sharp or jagged pulley groove tips.
(5)
Replace pulley.
(6)
Rubber deteriorated. (6)
Replace belt.
81102A