1997 ISUZU TFS SERIES clutch

7C-42 CLUTCH
1. CLUTCH SLIPPAGE
Checkpoint Trouble Cause Countermeasure
Adjust the push rod playNo push rod play in the master
cylinder NG
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
Adjust the push rod play
Defective transmission front
cover oil seal
Continued on the next page
Grease or oil adhering to the
facingToo much grease
Transmission front cover
unevenly worn
No push rod play in the slave
cylinder
Clean and grease the shift
blockShift blockInsufficient grease on the front
cover contact surfaces
NG NG NG NG NG
OK
OK
Clutch pedal free play
OK

CLUTCH 7C-43
Checkpoint Trouble Cause Countermeasure
Replace the release bearingRelease 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 OKGrease or oil adhering to the
facing
Clutch diaphragm springReplace the clutch pressure
plate assemblyW eak or broken clutch
diaphragm spring
Replace the driven plate
assemblyWorn facing
NG NG
OKFacing Continued from the previous page

7C-44 CLUTCH
2. CLUTCH DOES NOT RELEASE PROPERLY
Checkpoint Trouble Cause Countermeasure
Driven plateReplace the driven plate
Adjust the push rod play
Driven plate warped or
unevenly worn
Too much push rod play in the
slave cylinder
Hydraulic circuitBleed the hydraulic circuit
Adjust the push rod play
Air in the hydraulic circuit
Too much push rod play in the
master cylinder
OK
NG NG NG NG
OKClutch pedal free play
Clean or repair the top gear
shaft spline
Replace the top gear shaft
Corrosion or step wear on the
top gear shaft spline
Pressure plateReplace 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
OKNG NG NG
OK
Continued on the next page

CLUTCH 7C-45
Checkpoint Trouble Cause Countermeasure
Crankshaft pilot bearingReplace the pilot bearingTop gear shaft wobble is
causing pilot bearing wear
Repair or replace the flywheelFlywheel unevenly worn
NG NG OK
OKFlywheel Continued from the previous page

7C-46 CLUTCH
3. CLUTCH SHUDDER
Checkpoint Trouble Cause Countermeasure
Grease or oil adhering to the
facing
Clean the related parts and/or
replace the facing
Replace the transmission front
cover oil seal
Replace the pressure plate
assembly
Defective transmission front
cover oil seal
Pressure plate unevenly wornPressure plate
Clean the related parts and/or
replace the facing
Tighten the connections
Repair or replace the
applicable parts
Too much grease
Poorly connected components
causing looseness and
abrasion
OK
NG NG NG NG
OK
Power train
Clean and grease the spline
contact surface
Insufficient grease on the
spline contact surface of the
splined hub
Driven plate
Clean or repair the top gear
shaft spline
Replace the top gear shaft
Clean the related parts and/or
replace the facing
Replace the crankshaft rear oil
seal
Corrosion or step wear on the
top gear shaft spline
Defective crankshaft rear oil
seal
OKNG NG NG
OK
Continued on the next page

CLUTCH 7C-47
Checkpoint Trouble Cause Countermeasure
Replace the driven plate
assemblyW arpage and/or uneven wear
Replace the driven plate
assemblyLoose facing rivets
NG NG OKDriven plate Continued from the previous page
FlywheelRepair or replace the flywheelFlywheel uneven wear NG OK

7C-48 CLUTCH
4. CLUTCH NOISE
1) Clutch Pedal Depressed (Clutch Disengaged)
Checkpoint Trouble Cause Countermeasure
Replace the pedal shaft with
the sleeveW orn pedal shaft and/or
sleeve
Clean and grease the pedal
shaft and sleeveInsufficient grease at the
pedal shaft and sleeve
NG NGPedal shaft and sleeve
Master cylinder piston and
push rod contact facesClean and grease the master
cylinder piston and push rod
contact facesInsufficient grease at the
maser cylinder piston and
push rod contact faces NG OK
Driven plateReplace the driven plate
assemblyLoose or broken damper
spring NG OK
Crankshaft pilot bearingReplace the crankshaft pilot
bearingInsufficient grease at the
crankshaft pilot bearing (pilot
bearing worn) NG OK
2) Clutch Pedal Not Depressed (Clutch Engaged)
Replace the driven plateW eak or broken damper
spring NGDriven plate damper spring
Replace the crankshaft pilot
bearingInsufficient grease at the
crankshaft pilot bearing (pilot
bearing worn) OK
NG
Crankshaft pilot bearing

CLUTCH 7C-49
5. OIL LEAKAGE
Checkpoint Trouble Cause Countermeasure
Replace the piston capW eak or damaged piston cap NG
Tighten the oil pipe
Tighten the oil pipe connection
Tighten the fluid pipe and/or
hose connections
Fluid reservoirLoosely connected oil pipe
Loosely connected oil pipe
Master cylinder fluid pipe and
hoseLoosely connected fluid pipe
and/or hose
Slave cylinder oil pipe
Replace the piston cupSlave cylinderW eak or damaged piston cup
NG NG NG NG
OK OK
OK
OK
Master cylinder