Warner Electric Garden Tractor Clutch - Manual (Page 3)

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Warner Electric • 800-825-9050 P-1097-6 • 819-0458
Troubleshooting PTO Clutches and Clutch/Brakes
A. Clutch Symptom: Clutch will not Engage
Problem Possible Causes
Low voltage supply • Defective battery
• Faulty charging system
• Bad wiring or connectors
Rotor/armature airgap too large • Rotor/armature wear, readjust airgap
Zero voltage • Broken lead wire
• Open clutch coil, check coil resistance
• Faulty switch
• Blown Fuse
B. Clutch Symptom: Clutch Slips
Problem Possible Causes
Low voltage supply • Defective battery
• Faulty charging system
• Bad wiring or connectors
Overloaded clutch • Improperly sized clutch
Contaminated friction surfaces • Engine oil leak on clutch
Clutch loose on shaft • Loose mounting bolt
• Mounting bolt too long and bottoms
in shaft before clamping clutch
• Mounting washer too thin and deforms
when bolt is tightened
Clutch not mounted square • Mounting shoulder not square
• Clutch integral key hitting end of keyway
• Chamfer too small on spacer or ground
drive pulley
Broken rivet joints • Loose mounting, replace clutch
C. Clutch Symptom: Noisy Clutch
Problem Possible Causes
Failed bearing • Loose mounting
• Operating Temperature above 250° F
• Bearing Preloaded Axially
Adapter plate rattles against • Some noise is normal: to reduce noise
antiorotation pin level, isolate antirotation pin from
frame with rubber