Table 4-1. Troubleshooting - continuedPROBLEMPOSSIBLE CAUSEREMEDYClutch slips-1. Insufficient air pres-If operating in cold weather, the aircontinuedsure - continuedlines may be restricted due to freezingof the moisture in the air system. Theaddition of Denatured alcohol or Ethy-lene Glycol in the air receiver willeliminate this problem. Avoid the useof all rust inhibitors or commercialantifreeze.2. Ruptured tube.Replace tube.3. Malfunctioning quickRepair or replace quick release valve.release valves.4. Drive rings worn out.Replace drive rings.5. Dirt in drive ring.Disassemble and clean.Clutch drags or1. Misalignment ofRealign clutch and driving member.will not disengageclutch and drivingmember.2. Dirt in driving ring.Disassemble and clean.3. Tight center plate.Replace center plate.4. Quick release valvesRepair or replace quick release valves.stuck.Clutch overheating1. Clutch slippage.Refer to Clutch Slips.2. Misalignment ofAlign clutch and driving member.clutch and drivingmember.3. Dirt in driving ring orDisassemble and clean.spider.4. Plates not free on hub.Disassemble and clean, de-burr or re-place defective parts.Clutch noisy1. Pressure plate and in-Disassemble, clean or replace if de-sulator not fullyfective.disengaging.2. Excessive wear fromRealign clutch and driven member.misalignment or fromRefer to Clutch Drags or Will Notclutch not fully dis-Disengage.engaging.4-11
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