4
CLUTCH TROUBLESHOOTING
CLUTCH SLIPPAGE
PROBABLE CAUSE
CORRECTION
Lack of free pedal
Re-adjust per instructions
Release mechanism binding
Check release mechanism and linkage; lube if necessary
Replace with new clutch assembly; find and repair cause of grease or oil contamination
Grease or oil on clutch facings
Worn clutch facings
Replace with new clutch assembly
Weak pressure springs
Replace with new clutch assembly
Overloaded clutch
Review application to ensure that proper clutch was installed
NOISY CLUTCH
PROBABLE CAUSE
CORRECTION
Clutch release bearing lacks lubricant or damaged
Lubricate if a zerk fitting or replace clutch assembly
Flywheel pilot bearing lacks lubricant or damaged
Lubricate or replace with new bearings
Adjust clutch per instructions; check wear on cross shafts, bell housing bushings and release yoke; replace if necessary
Clutch release bearing housing hitting flywheel ring
Wrong tolerance between drive slots and drive lugs on pressure plates
Clearance should be no less than 006”
POOR CLUTCH RELEASE
PROBABLE CAUSE
CORRECTION
Clutch adjustment not correct
Re-check adjustment per instructions
Replace pilot bearing and ensure proper seating in flywheel and tolerance to input shaft
Flywheel pilot bearing bound in flywheel or on input shaft
Damaged clutch release bearing
Replace with new clutch assembly
Reposition release shaft so it does not project; check bell housing bushings, cross shafts and release yoke for wear
Clutch release shaft projecting through release yoke
Release yoke hitting cover assembly at full release position Replace release yoke with proper yoke Release yoke not aligned properly with release bearing
Check flywheel has not been resurfaced more than the 060” maximum Check drive pins are 90° to flywheel surface and minimum 006” clearance between drive pins & center plate slots
Intermediate plate sticking on drive lugs (14” angle spring — 2 plate assemblies only)
Pressure plate not retracting fully
Check pressure plate drive lugs for 006” clearance
Worn splines on input shaft of transmission
Replace input shaft and check disc hubs for excess wear
Cleaning disc is not effective; check for leak causing contamination; replace clutch assembly
Disc facings contaminated with oil or grease
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