CLUTCH
STW34, STW37, STW40, WSM
2-S1
1. TROUBLESHOOTING
9Y1211109CLS0001US0
Symptom
Probable Cause and
Checking Procedure
Solution
Reference
Page
Clutch Drags 1. Clutch pedal free travel is
too much.
Adjust the clutch pedal free travel to the
factory specification.
2-S4
2. Dusts generated from the
clutch disc facing are
attached on the clutch
disc.
Clean the dusts on the clutch disc and
adjust the clutch pedal free travel to the
factory specification.
2-S30
3. Release fork is damaged. Replace the release fork. 2-S30
4. Clutch disc or pressure
plate is warped.
Make sure and replace the clutch disc
and pressure plate.
2-S30
Clutch Slips 1. Clutch disc is worn
excessively.
Replace the clutch disc. 2-S30
2. Grease or oil is attached
on clutch disc facing.
Replace clutch disc with a new one. 2-S30
3. Clutch disc or pressure
plate is warped.
Make sure the clutch disc and the
pressure plate with a new one.
2-S30
4. Diaphragm spring is
weaken or broken.
Replace pressure plate assembly. 2-S30
Chattering 1. Grease or oil is attached
on clutch disc facing.
Replace clutch disc assembly. 2-S30
2. Clutch disc or pressure
plate is warped.
Replace clutch disc or pressure plate as
an assembly.
2-S30
3. Clutch disc spline boss is
worn or rusted.
Replace clutch disc assembly or remove
rust.
2-S30
4. Pressure plate or flywheel
face is cracked or scored.
Replace pressure plate assembly or
flywheel.
2-S30
5. Clutch disc spline boss
and main shaft spline is
worn.
Replace clutch disc assembly or main
shaft.
2-S30
6. Diaphragm spring strength
uneven or diaphragm
spring is damaged.
Replace pressure plate assembly with a
new one.
2-S30
Rattle During
Running
1. Clutch disc spline boss is
worn.
Replace clutch disc. 2-S30
2. Replace release bearing is
worn or sticking.
Replace release bearing. 2-S30
Clutch Squeaks 1. Replace release bearing is
sticking or dry.
Replace release bearing. 2-S30
2. Clutch disc is worn
excessively.
Replace clutch disc. 2-S30
Vibration 1. Clutch disc rivet is worn or
damaged.
Replace clutch disc. 2-S30
2. Clutch parts are damaged. Replace clutch disc and pressure plate. 2-S30
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