Potential Problem Possible Reasons Fix Replace battery Fix or replace lead wire. Fix or replace lead wire. Clean off surfaces with solvent and reburnish. Replace the clutch if damage is severe enough. Size clutch correctly for the application. Replace clutch. Replace clutch. Try to reburnish clutch. If slipping is to severe, clutch will have to be replaced. Defective battery. Lead wire cut which could be intermittently grounding out the lead wire causing the clutch to turn on and off or not to give full voltage. If lead wire is kinked or pinched and the break is internal, the clutch operation may show up as being erratic engagement. Oil or other lubricant has been sprayed on the clutch surface. Sometimes this shows up after the clutch is disassembled. Physical evidence is either burnt oil or a greasy metallic surface showing oil still present. Output torque required is greater than what the clutch can handle. If input torque going into clutch is greater than the output torque required, the clutch will slip. If it slips too long, the clutch surfaces will be galled. If output is stalled, clutch could slip to the point where it will burn up and destroy either bearings or the field. If full torque is required immediately and clutch is not burnished, it will slip and could become galled. Low voltage going into the clutch. Erratic engagement. Clutch is contaminated. Clutch overloaded. Output stalled. Clutch not burnished. Potential Problem Possible Reasons Fix Retighten center bolt or change spacer or shaft length Check center bolt and washer to make sure it is tight. If it is tight, make sure that the shaft is not too long. Clutch shaft should end before the end of the clutch to allow some deflection in the center bolt and washer to keep clutch on tightly. If clutch is able to move on the shaft: Clutch Slips: Electromagnetic Clutches & Brakes Troubleshooting Guide Noisy Clutch www.jbj.co.uk/electromagnetic-clutches.html 58 #DriveLineHarmony
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