Isuzu KB P190. Manual — part 1205

7C-42 CLUTCH

TROUBLESHOOTING

Refer to this Section to quickly diagnose and repair clutch problems.
Each troubleshooting chart has three headings arranged from left to right.

(1) Checkpoint (2) Trouble Cause (3) Countermeasure

This Section is divided into five sub-sections:

1. Clutch Slippage

2. Clutch Does Not Release Properly

3. Clutch Shudder

4. Clutch Noise

1) Clutch pedal Depressed (Clutch Disengaged)

2) Clutch pedal Not Depressed (Clutch Engaged)

5. Oil Leakage

CLUTCH 7C-43

1. CLUTCH SLIPPAGE

Checkpoint

Problem

Countermeasure

Adjust the push rod play

No push rod play in the master

cylinder

NG

Clutch pedal free play

Clean the related parts and/or
replace the facing

Replace the transmission front
cover oil seal

Clean the related parts and/or

replace the facing

Repair or replace the

transmission front cover

Defective transmission front

cover oil seal

Continued on the next page

Grease or oil adhering to the

facing

Too much grease

Transmission front cover

unevenly worn

Release bearing

NG

NG

NG

OK

OK

OK

7C-44 CLUTCH

Checkpoint

Problem

Countermeasure

Replace the release bearing

Release bearing broken

Clean the related parts and/or
replace the facing
Replace the crankshaft rear oil
seal

Defective crankshaft rear oil

seal

NG

NG

OK

OK

Grease or oil adhering to the

facing

Clutch diaphragm spring

Replace the clutch pressure

plate assembly

Weak or broken clutch

diaphragm spring

Replace the driven plate

assembly

Worn facing

NG

NG

OK

Facing

Continued from the previous page

CLUTCH 7C-45

2. CLUTCH DOES NOT RELEASE PROPERLY

Checkpoint Problem

Countermeasure

Adjust the push rod play

Too much push rod play in the

master cylinder

NG

Clutch pedal free play

Driven plate

Replace the driven plate

Driven plate warped or

unevenly worn

Hydraulic circuit

Bleed the hydraulic circuit

Air in the hydraulic circuit

OK

NG

NG

OK

Clean or repair the top gear

shaft spline

Replace the top gear shaft

Corrosion or step wear on the

top gear shaft spline

Pressure plate

Replace the pressure plate

assembly

Clean and grease the splined

contact surface

Pressure plate unevenly worn

Insufficient grease on the

spline contact surface of the

splined hub

OK

NG

NG

NG

OK

Continued on the next page