CLUTCH TROUBLE DIAGNOSIS AND CORRECTIONS #6
The Clutch Drags.
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POSSIBLE CAUSES
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REMEDIES
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| 1) Excessive pedal free play. |
1) Set free play at 13/8” to 19/16” (35 to 40 mm) |
| 2) Driven plate warped. |
2) Set level of driven plate, if possible. Maximum plate runout: .0118″ (0, 3 mm). |
| 3) Roughness on driven plate facings. |
3) Rub facings with a metal brush or replace them, if necessary. |
| 4) Driven plate facings improperly fitted, loose or broken. |
4) Replace facings. Facing rivets should be clenched, to avoid damage to pressure plate and flywheel. |
| 5) Driven plate hub forcing on clutch shaft. |
5) Locate cause of trouble and remove it, if possible. Otherwise replace the driven plate. |
| 6) Damaged clutch shaft splines prevent the driven plate from sliding. |
6) Replace the clutch shaft; also the driven plate, if required. |
| 7) Oil or grease on driven plate facings. |
7) Replace facings. |
CLUTCH TROUBLE DIAGNOSIS AND CORRECTIONS #5
If your Experiencing Excessive Facing Wear.
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POSSIBLE CAUSES
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REMEDIES
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| 1) Insufficient pedal free play. |
1) Set clutch pedal free play at 1 3/8“ to 1 9/16” (35 to 40 mm) |
| 2) Driver steps unnecessarily on pedal; this causes facing wear and damage to throwout ring. |
2) Advise driver to discontinue wrong practice and step on clutch pedal only when necessary. |
| 3) Pressure springs weak or broken. |
3) Check pressure springs for tension and replace springs, if they are unserviceable. |
| 4) Driven plate facings installed incorrectly. |
4) Replace facings by new ones and install them correctly. Check driven plate for center. |
CLUTCH TROUBLE DIAGNOSIS AND CORRECTIONS #4
When The Clutch Slips
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POSSIBLE CAUSES
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REMEDIES
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| 1) Insufficient clutch pedal return travel, due to the flexible cable being stuck or the pedal return spring being too weak. |
1) Locate cause of failure and replace spring or eliminate sticking of control cable. |
| 2) Damaged throwout mechanism. |
2) Overhaul throwout mechanism; also clutch, if required. |
| 3) Clutch pressure springs weak or broken. |
3) Overhaul clutch and replace springs. |
| 4) Oil or grease on driven plate facings. |
4) Remove cause of oil leakage and replace facings, if they cannot be reconditioned by rubbing with turpentine and metal brush. |
| 5) Driven plate facings worn or burned. |
5) Replace facings. |
CLUTCH TROUBLE DIAGNOSIS AND CORRECTIONS #3
If you Experience Noises when Clutch Pedal is Released
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POSSIBLE CAUSES
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REMEDIES
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| 1) Misalignment of driven plate to flywheel causes slight movement of driven plate hub in respect of facings. This noise is particularly audible with engine idling or running at low speed. |
1) Set level of driven plate. With driven plate locked on clutch shaft, set it under slight rotation and check for no runout in excess of .0118″ (0, 3 mm), using a scriber. |
| 2) Insufficient pedal free play. |
2) Set clutch pedal free play at 13/8 to 1 9/16 (35 to 40 mm) |
| 3) Pedal return spring broken, weak or unhooked. |
3) Replace the spring or hook it up carefully. |
| 4) Forked lever return spring broken, weak or unhooked. |
4) Replace the spring or hook it up and check for correct position. |
CLUTCH TROUBLE DIAGNOSIS AND CORRECTIONS #2
If The Clutch Grabs
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POSSIBLE CAUSES
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REMEDIES
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| 1) Oil or grease on flywheel, pressure plate and driven plate facings. |
1) Remove cause of leakage, clean flywheel and pressure plate thoroughly, replace driven plate facings. |
| 2) Loose driven plate facings due to poor rivet tightness. |
2) If facings are not worn, replace defective rivets. Otherwise, replace facings and clench rivets securely. |
| 3) Driven plate hub does not slide freely on clutch shaft. |
3) Remove any foreign matter or dirt deposits from shaft splines. Should trouble still be present, replace damaged part. |
| 4) Pressure plate deeply cracked or broken. |
4) Replace pressure plate. |
| 5) Improper adjustment of withdrawal levers. |
5) Adjust withdrawal levers as specified, under <<Assembly and Adjustment of Clutch>>. |
| 6) Misalignment. |
6) Locate the defective point and, if possible, reset alignment or replace distorted parts. |
| 7) Stiffened throwout mechanism. |
7) Locate stiff point and replace parts, if necessary. |
| 8) Driven plate facings worn out. |
8) Install new facings and make sure that the driven plate, pressure plate and flywheel are not damaged. |
CLUTCH TROUBLE DIAGNOSIS AND CORRECTIONS #1
If your Experiencing Noises When Clutch Pedal is Depressed
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POSSIBLE CAUSES
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REMEDIES
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| 1) Throwout thrust sleeve or ring excessively worn damaged or broken. |
1) Replace sleeve and ring. |
| 2) Seizure of thrust ring and withdrawal levers. |
2) Replace thrust ring. Clean lever ends with metal brush and smooth out bearing contact faces with felt polishers. |
| 3) Insufficient pedal free play. |
3) Set pedal free play at 1 8/8 ” to 1 9/16″ (35 to 40 mm). To do so, work on withdrawal lever control rod as directed on page 94. |
| 4) Pedal return spring broken, weak or unhooked. |
4) Replace spring or hook it up and check for correct position. |
| 5) Forked lever return spring broken, weak or un- hooked. |
5) Replace spring or hook it up carefully. |
| 6) Excessive play of driven plate hub to clutch shaft causes rattles.
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6) Replace the driven plate and check that clearance between hub of new driven plate and clutch shaft is within .0039″ (0, 10 mm) endwise and .0118″ (0, 30 mm) crosswise. Should clearance exceed above limits, replace also the clutch shaft. |
