Warner Electric Heavy Duty Pump Clutch - Manual (Page 3)

Troubleshooting Checklist
A. Symptom: Clutch will not engage
Problem
Possible Causes Solution
Low voltage or wrong voltage • Defective power supply (battery?)
• Defective or corroded wiring or connectors
Rotor/armature airgap too large • Worn components • Replace if coil is OK
Zero current • Broken lead wire
• Faulty switch
• Open clutch coil
• Check coil resistance.
B. Symptom: Clutch Slips
Problem
Possible Causes Solution
Clutch not burnished • Burnish clutch per burnishing instructions
Clutch attempting to engage
against deadhead pressure
• Load being applied to system
• Defective valve(s)
Low supply voltage • Defective power supply or battery
• Defective or corroded wiring or connectors
Overloaded clutch • High pressure relief valve stuck or out of
adjustment
Contaminated friction surfaces • Oil on clutch (friction surfaces must be clean)
Clutch loose on shaft • Loose mounting
Clutch not mounted square to
drive shafts
• Dimensional problem at flange or shaft mounting
points
Broken rivet joints
C. Symptom: Noisy Clutch*
Problem
Possible Causes Solution
With clutch disengaged • Faulty armature bearing
With clutch engaged • Faulty field bearing
• Loose mounting
• Operating temperature above 250˚ F
• Bearing preloaded axially
*Chirp as clutch engages is normal
3 Warner Electric • 800-825-9050 P-227 • 819-0374