Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 398

GENERAL DESCRIPTION

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CLUTCH

21A-3

.

G EN ER A L DESC RIPTIO N

M1211000100041

The clutch is a dry single-disc, diaphragm type;
hydraulic pressure is used for the clutch control.

CONSTRUCTION DIAGRAM

C LU TC H D IA G N O SIS

INTROCUCTION TO CLUTCH DIAGNOSIS

M1211003400052

A defective clutch causes a clutch slippage, resulting
in poor torque transmission. The causes for this
problem may be a faulty clutch line or disc, or a
maladjustment of the clutch pedal.

CLUTCH DIAGNOSIS TROUBLESHOOTING STRATEGY

M1211003500048

Use these Steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a
clutch fault.

1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Find the malfunction by following the Symptom

Chart.

4. Verify malfunction is eliminated.

AC001238AB

CLUTCH HOSE

CLUTCH TUBE

CLUTCH TUBE

CLUTCH PEDAL

RESERVOIR HOSE

STOPPER

DAMPER ASSEMBLY
<3.0L ENGINE>

CLUTCH MASTER
CYLINDER

CLUTCH RELEASE
CYLINDER

PEDAL SUPORT
MEMBER

RESERVOIR TANK

CLUTCH DIAGNOSIS

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CLUTCH

21A-4

SYMPTOM CHART

M1211003600045

SYMPTOM PROCEDURES

M1211004100021

INSPECTION PROCEDURE 1: Clutch slips

DIAGNOSIS

Step 1. Check insufficient clutch pedal play.
Refer to

P.21A-7

.

Q: Does the clutch pedal play meet the standard

value?
YES :

Go to Step 2.

NO :

Adjust the clutch pedal play. Then go to
Step 7.

Step 2. Check the clutch disc facing for
excessive wear.

Q: Is the clutch disc facing worn excessively?

YES :

Replace the clutch disc. Then go to Step 7.

NO :

Go to Step 3.

Step 3. Check the clutch disc facing for
hardening and adhesion of oil.

Q: Is the clutch disc facing hardened or contaminated

with oil?
YES :

Replace the clutch disc. Then go to Step 7.

NO :

Go to Step 4.

Step 4. Check the clutch release fork for
catching.

Q: Is the clutch release fork stuck?

YES :

Repair or replace the clutch release fork.

Then go to Step 7.

NO :

Go to Step 5.

Step 5. Check the diaphragm spring for
weakness and damage.

Q: Is the diaphragm spring weaken or damaged?

YES :

Replace the clutch cover assembly. Then

go to Step 7.

NO :

Go to Step 6.

Step 6. Check the hydraulic system for clogging.

Q: Is the hydraulic system clogged?

YES :

Repair or replace the hydraulic system.

Then go to Step 7.

NO :

Go to Step 7.

Step 7. Check the symptom.

Q: Is the symptom reproduced?

YES :

Return to Step 1.

NO :

This diagnosis is complete.

M1211004200028

INSPECTION PROCEDURE 2: Gear shift malfunction

DIAGNOSIS

Step 1. Check the excessive clutch pedal play.
Refer to

P.21A-7

.

Q: Does the clutch pedal play meet the standard

value?
YES :

Go to Step 2.

NO :

Adjust the clutch pedal play. Then go to

Step 9.

Step 2. Check the clutch disc for distortion and
excessive oscillation.

Q: Is the clutch disc distorted or oscillated?

YES :

Replace the clutch disc. Then go to Step 9.

NO :

Go to Step 3.

SYMPTOMS

INSPECTION PROCEDURE

REFERENCE PAGE

Clutch slips

1

P.21A-4

Gear shift malfunction

2

P.21A-4

Clutch noise

3

P.21A-5

Clutch pedal feels "heavy"

4

P.21A-6

Worn or damaged clutch disc facing

5

P.21A-6

CLUTCH DIAGNOSIS

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CLUTCH

21A-5

Step 3. Check the clutch cover assembly for
wear.

Q: Is the clutch cover assembly worn?

YES :

Replace the clutch cover assembly. Then

go to Step 9.

NO :

Go to Step 4.

Step 4. Check the clutch disc spline for wear and
corrosion.

Q: Is the clutch disc spline worn or corroded?

YES :

Replace the clutch disc. Then go to Step 9.

NO :

Go to Step 5.

Step 5. Check the clutch disc facing for peeling.

Q: Is clutch disc facing peeled?

YES :

Replace the clutch disc. Then go to Step 9.

NO :

Go to Step 6.

Step 6. Check the clutch release bearing for wear.

Q: Is the clutch release bearing worn?

YES :

Replace the clutch release bearing. Then

go to Step 9.

NO :

Go to Step 7.

Step 7. Check the pressure plate and the flywheel
for damage.

Q: Is the pressure plate or the flywheel damaged?

YES :

Replace the clutch cover assembly or the

flywheel. Then go to Step 9.

NO :

Go to Step 8.

Step 8. Check the hydraulic system for leakage,
air mix and clogging.

Q: Is there a leakage, air mix or clogging on the

hydraulic system?
YES :

Repair or replace the hydraulic system.

Then go to Step 9.

NO :

Go to Step 9.

Step 9. Check the symptom.

Q: Is the symptom reproduced?

YES :

Return to Step 1.

NO :

This diagnosis is complete.

M1211004300025

INSPECTION PROCEDURE 3: Clutch noise

DIAGNOSIS

Step 1. Check insufficient clutch pedal play.
Refer to

P.21A-7

.

Q: Does the clutch pedal play meet the standard

value?
YES :

Go to Step 2.

NO :

Adjust the clutch pedal play. Then go to
Step 9.

Step 2. Check the clutch cover assembly for
improper installation.

Q: Is the clutch cover assembly installed properly?

YES :

Go to Step 3.

NO :

Replace the clutch cover assembly. Then go
to Step 9.

Step 3. Check the clutch disc facing for
excessive wear.

Q: Is the clutch disc facing assembly worn

excessively?
YES :

Replace the clutch disc. Then go to Step 9.

NO :

Go to Step 4.

Step 4. Check the clutch release fork for
catching.

Q: Is the clutch release fork stuck?

YES :

Replace the clutch release fork. Then go to

Step 9.

NO :

Go to Step 5.

Step 5. Check the clutch release bearing for wear.

Q: Is the clutch release bearing worn?

YES :

Replace the clutch release bearing. Then

go to Step 9.

NO :

Go to Step 6.

Step 6. Check the torsion spring for wear and
damage.

Q: Is the torsion spring worn or damaged?

YES :

Replace the clutch disc. Then go to Step 9.

NO :

Go to Step 7.

CLUTCH DIAGNOSIS

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CLUTCH

21A-6

Step 7. Check the pilot bushing for damage.

Q: Is the pilot bushing damaged?

YES :

Replace the pilot bushing. Then go to Step

9.

NO :

Go to Step 8.

Step 8. Check the bearing sleeve sliding surface
for insufficient lubrication.

Q: Is the lubrication of the bearing sleeve sliding

surface sufficient?
YES :

Go to Step 9.

NO :

Repair the bearing sleeve sliding surface.
Then go to Step 9.

Step 9. Check the symptom.

Q: Is the symptom reproduced?

YES :

Return to Step 1.

NO :

This diagnosis is complete.

M1211004400022

INSPECTION PROCEDURE 4: Clutch pedal feels "heavy"

DIAGNOSIS

Step 1. Check the clutch pedal for insufficient
lubrication.

Q: Is the lubrication of the clutch pedal sufficient?

YES :

Go to Step 2.

NO :

Repair the clutch pedal. Then go to Step 5.

Step 2. Check the clutch disc spline for
insufficient lubrication.

Q: Is the lubrication of the clutch disc spline

sufficient?
YES :

Go to Step 3.

NO :

Replace the clutch disc. Then go to Step 5.

Step 3. Check the clutch release fork for
catching.

Q: Is the clutch release fork stuck?

YES :

Replace the clutch release fork. Then go to

Step 5.

NO :

Go to Step 4.

Step 4. Check the insufficient lubrication of
bearing sleeve sliding surface.

Q: Is the lubrication of the bearing sleeve sliding

surface sufficient?
YES :

Go to Step 5.

NO :

Repair the bearing sleeve sliding surface.
Then go to Step 5.

Step 5. Check the symptom.

Q: Is the symptom reproduced?

YES :

Return to Step 1.

NO :

This diagnosis is complete.

M1211004500029

INSPECTION PROCEDURE 5: Worn or damaged clutch disc facing

DIAGNOSIS

Step 1. Check the clutch disc facing for wear and
damage.

Q: Is the clutch disc facing worn or damaged?

YES :

Replace the clutch disc. Then go to Step 7.

NO :

Go to Step 2.

Step 2. Check for oil on the clutch disc facing.

Q: Is there oil on the clutch disc facing?

YES :

Replace it. Then go to Step 7.

NO :

Go to Step 3.

Step 3. Check the diaphragm spring for uneven
height.

Q: Is the diaphragm spring even height?

YES :

Go to Step 4.

NO :

Replace the clutch cover assembly. Then go
to Step 7.