www.jbj.co.uk/electromagnetic-clutches.html 56 Electromagnetic Clutches & Brakes Troubleshooting Guide #DriveLineHarmony Potential Problem Possible Reasons Fix Replace switch. If rotor and armature connot be separated, replace the clutch. If they do separate, follow burnishing procedure. Replace clutch. Loosen brake nuts and reset air gap according to recommendations. If clutch is destroyed, replace clutch. Faulty switch. The clutch has been severely galled and has locked up. (Galling is the condition whereby a piece of metal is trapped between the armature and the rotor and melts due to high pressure and heat, spot welding the surfaces together.) Bearing lost grease due to seal problem, temperature or water contamination. If the brake nuts are screwed down too tight, the armature will be pressed against the rotor all the time. This should be evident by discoloration of the brake plate. If the unit ran long enough, the brake plate and the clutch would be destroyed. Voltage not releasing. Rotor and armature locked together. Pulley bearing locked. Brake plate clamped * down too tightly. Potential Problem Possible Reasons Fix Pull apart and re-seat connector. Check with voltmeter, battery should be 8-16 volts. (Assuming 12 volt battery.) Fix charging system. Fix or replace lead wire. If destroyed, replace clutch. Replace fuse. Replace the switch. Wiring connector not seated properly. No voltage or low voltage coming from the battery. Defective charging system. Lead wire cut or broken internally. Fuse blown. Defective switch operating clutch. No voltage going to the clutch. Clutch Will Not Engage: Clutch Will Not Disengage: PTO Clutch/Brakes Only *
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