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CLUTCH
6 - 7
CLUTCH SLIPS
Condition Found
Cause
Correction
1.
Disc facing worn out.
a) Normal wear.
b) Driver frequently "rides"
(slips) clutch. Results in rapid
wear overheating.
c)
Insufficient clutch cover
diaphragm spring tension.
Replace clutch disc. Also replace
cover if spring is weak or pressure
plate surface is damaged.
2. Clutch disc facing
contaminated with oil, grease,
or clutch fluid.
a) Leak at rear main seal or at
transmission input shaft seal.
b) Excessive amount of grease
applied to input shaft splines.
c)
Road splash, water entering
housing.
d) Slave cylinder leaking.
a), b), c), d) Replace leaking
seals. Apply less grease to
input shaft splines. Replace
clutch disc (do not clean and
reuse). Clean clutch cover and
reuse only if cover is in good
condition. Replace slave
cylinder if leaking.
3. Clutch is running partially
disengaged.
Release bearing sticking-binding.
Does not return to normal running
position.
Verify that bearing is actually
binding, then replace bearing and
transmission front bearing retainer if
sleeve surface is damaged.
4 .
Flywheel height incorrect.
Flywheel surface improperly
machined. Too much stock removed
or surface is tapered.
Replace flywheel.
5 .
Wrong disc or pressure plate
installed.
Incorrect parts order or model
number.
Replace with correct parts.
Compare old and new parts before
installation.
6. Clutch disc, cover and/or
diaphragm spring, warped,
distorted.
a) Rough handling (impact) bent
cover, spring, or disc.
b) Incorrect bolt tightening
sequence and method caused
warped cover.
Install new disc or cover as needed.
Follow installation/tightening
instructions.
7.
Facing on flywheel side of disc
torn, gouged, worn.
Flywheel surface scored and nicked. Reduce scores and nicks by sanding
or surface grinding. Replace
flywheel if scores-nicks are deeper
than .002-.004 inch.
8. Clutch disc facing burnt
(charred). Flywheel and cover
pressure plate surfaces heavily
glazed.
a) Frequent operation under high
loads or hard acceleration
conditions.
b) Driver frequently "rides"
(slips) clutch. Results in rapid
wear and overheating of disc
and cover.
Scuff sand flywheel. Replace clutch
cover and disc. Alert driver to
problem cause.
J9006-21
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