User Guide
EXEDY Globalparts Corporation • 800.346.6091 • www.exedyusa.com
43
EXEDY Globalparts Corporation • 800.346.6091 • www.exedyusa.com
42
Malfunctions of Clutch Pressure Plate Cover Assemblies
Malfunctions of Clutch Pressure Plate Cover Assemblies
PROBLEM:
No clamp load on to clutch disc.
SYMPTOM:
Slipping clutch.
CAUSE:
1. Diaphragm spring load below specications.”
Due to design of cover type, diaphragm has not
been replaced.
2. Inferior remanufacture/spring load not
checked.
SOLUTION:
Replace with only a new EXEDY/Daikin pressure
plate cover assembly.
PROBLEM:
1. Hold down bolts still in pressure
plate assembly.
2. Unable to adjust.
3. Will not transmit power.
SYMPTOM:
Clutch slipping just after installing new clutch.
CAUSE:
Clutch cover pressure plate assembly hold down
bolts to assist ease of installation not removed.
SOLUTION:
Remove hold down bolts.
1. Do not remove clutch lever
adjustment nuts.
2. Common in Japanese trucks
PROBLEM:
Unable to change gear/bent drive straps.
SYMPTOM:
No disengagement.
CAUSE:
1. Improper driving practice.
2. Distorted retractor leaf spring caused by
extreme reverse thrust load spring.
3. Sudden down changing of gears i.e. 5th gear
to 2nd gear.
4. Wrong clutch cover assembly used due to
engine turning direction.
5. Constant “dropping” of clutch at extremely
high revs when taking o.
SOLUTION:
1. Driver education.
2. Install correct cover assembly for application.
3. Fit extra straps to suit heavy duty application
(optional), or use EXEDY/Daikin Sports clutch.
PROBLEM:
Excessive wear on diaphragm tips and a highly
glazed pressure plate casting.
SYMPTOM:
Slipping clutch/shudder/judder.
CAUSE:
1. Lack of free travel/bearing riding on
diaphragm.
2. Driver resting foot on clutch pedal.
3. Quill shaft worn/bearing stuck on a worn spot
and not returning to original position.
4. Clutch slave cylinder corroded or worn and
piston not returning to allow free travel.
5. Stretched or sticky cable.
SOLUTION:
1. Adjust free play in clutch to specication.
2. Driver education.
3. Replace quill shaft (gear box main drive nose
cone).
4. Replace clutch slave cylinder and check
pressure build up in clutch master cylinder.
5. Replace cable. (Do not re-oil old cable).
PROBLEM:
Clutch diaphragm ngers or levers are uneven.
SYMPTOM:
Clutch drag/Judder/Noisy clutch.
CAUSE:
The pressure plate cover assembly was torqued
down incorrectly i.e. not diagonally.
SOLUTION:
Tighten bolts temporary by hand, then torque
down in correct diagonal sequence one by one.
Uneven diaphragm tips