|
PROBLEM |
CAUSAL FACTORS |
CORRECTIVE ACTION |
|
Start-Up Chatter |
|
During light clutch engagement in low or reverse |
External - Engine Roughness |
Tune engine. Set to proper idle speed |
|
External - Equalizer bar misalignment and/or end play
excessive or wrong part |
Readjust per Shop Manual |
|
External - Engine misaligned. Not properly seated on mounts |
Loosen mount bolts, align and center engine so mounts center
in teardrop holes |
|
Internal - Oil on clutch disc |
Correct leak, replace disc, clean pressure plate and
flywheel friction surfaces with clean solvent |
|
Internal - Glazed flywheel surface |
Deglaze flywheel surface with coarse emery cloth, stroke
parallel to machining lines |
|
Internal - Disc warped or bent (little or no reserve) |
Replace disc |
|
Internal - Pressure plate attaching bolts loose or missing |
Replace broken or missing bolt - Torque to specification |
|
Internal - Clutch housing loose or misaligned |
Realign as per Shop Manual |
|
Internal - Pressure plate fingers bent, out-of-plane or
sticking (will not return - hung up) |
Replace pressure plate |
|
Internal - Release lever (fork) bent |
Replace release lever and/or fulcrum bracket in clutch
housing |
|
Clutch Inoperative |
Pressure plate release finger fulcrum pin missing at drive
lug |
Replace pressure plate |
|
Clutch Noise |
|
Squeal (Engine idling - clutch released when cold) |
Grease on pilot bearing - prevents oil from sweating out of
bearing |
Replace pilot bearing - seat properly in crankshaft, do
not grease, clean input shaft pilot and apply coat of
light oil for initial lube only. |
|
Pilot bearing in crankshaft not square with crankshaft
(misaligned) |
Replace pilot bearing as described in foregoing paragraph |
|
Clutch housing misalignment (pilot bore and face runout) |
Align housing as per Shop Manual |
|
Squeak (Engine off) |
No lube on equalizer bar bearings |
Remove equalizer bar, pack ends with lube and replace
spherical bearings |
|
No lube on release rod bushings |
Replace bushing, upper and lower applying lube to inside and
outside of bushings prior to assembly |
|
No lube on release lever at fulcrum and release bearing hub
retainer clips |
Remove release lever and bearing Daub lube under leading
edge of retaining clips |
|
Binding of Pressure plate release fingers |
Replace pressure plate |
|
Scrubby Pedal Action and Feel |
No lube at release lever fingers and on back face of release
bearing |
Daub grease under leading edge of retaining clips. If clips
are open or bent, replace hub and bearing assembly |
|
No lube in release bearing hub (dry transmission input
shaft, input bearings, retainer) |
Replace release bearing and clean transmission input shaft
retainer with solvent - do not lube |
|
Rattle - Engine Idling Clutch Engage or on Light Engagement |
No freeplay (constant running release bearing |
Check and reset pedal height then adjust freeplay |
|
Pedal hang-up (pedal does not return to stop) |
Dry pedal pivot shaft - lube pedal pivot shaft |
|
Failed release bearing |
Replace release bearing - daub grease under leading edge of
hub retaining clips |
|
Slipping Clutch |
| |
Insufficient freeplay at release rod bullet. (Excessive
slippage will cause burned out clutch.) |
Readjust freeplay at release rod (bullet) |
|
Oil on disc assembly (also causes clutch chatter) |
Replace disc after washing flywheel and pressure plate
friction surfaces with clean solvent |
|
Transmission-Related Problems |
|
Gear Clash |
Insufficient clutch reserve (excessive clutch freeplay
and/or clutch pedal set too low |
Check and reset pedal then adjust freeplay |
|
Disc warped or bent preventing full release |
Replace disc |
|
Clutch housing misalignment |
Realign clutch housing per Shop Manual |
|
Pressure plate release finger hang-up |
Replace pressure plate |
|
Nicked or galled splines on clutch disc or input shaft.
Heavy or dry grease on splines |
Clean disc hub splines and input shaft spline of all grease.
Remove nicks or galled areas with file |
|
Gear Jump-Out |
Clutch housing misalignment |
Realign clutch housing per Shop Manual. Also refer to
transmission problems for corrective action |
|
Noise - Clutch fully engaged |
Transmission problem |
Refer to transmission problems for corrective action |
