1997 ISUZU TFS SERIES transmission

CLUTCH 7C-25
3. Check that the driven plate moves smoothly on the
transmission top gear shaft spline.
Minor ridges on the top gear shaft spline may be removed
with an oil stone.
Driven Plate Warpage
1. Insert the clutch pilot aligner into the driven plate splined
hub.
The clutch pilot aligner must be held perfectly horizontal.
Clutch Pilot Aligner : 5-8840-2634-0 (HEC Engine Series)
5-8525-3001-0 (J-24547) (Except HEC Engine Series)
2. Set a dial indicator to the driven plate outside
circumference.
3. Slowly turn the driven plate.
Read the dial indicator as you turn the driven plate.
If the measured value exceeds the specified limit, the driven
plate assembly and/or the facing must be replaced.
Driven Plate Warpage mm(in)
Standard Limit
0.7 (0.028) 1.0 (0.039)
Driven Plate Splined Hub Spline Wear
1. Clean the driven plate splined hub.
2. Install the driven plate to the transmission top gear shaft
spline.
3. Set a surface gauge to the driven plate outside
circumference.
4. Slowly turn the driven plate counterclockwise.
Measure the spline rotation play as you turn the driven
plate.
If the measured value exceeds the specified limit, the driven
plate assembly must be replaced.
Driven Plate Splined Hub Spline Wear mm(in)
Standard Limit
0.5 (0.020) 1.0 (0.039)

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

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