Table 4-1. Troubleshooting - continued

Table 4-1. Troubleshooting - continued - TM-5-3820-256-24-1_44

Table 4-1. Troubleshooting - continued - TM-5-3820-256-24-1_46

TM-5-3820-256-24-1 Drilling System Manual
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Table 4-1. Troubleshooting - continued PROBLEM POSSIBLE CAUSE REMEDY Clutch overheating - 3. Dirt in driving ring or Disassemble and clean. Continued spider. 4. Plates not free on hub. Disassemble and clean, de-burr or re- place defective parts. Clutch noisy 1. Pressure plate and Disassemble, clean or replace if defec- insulator not fully tive. disengaging. 2. Excessive wear from Realign clutch and driven member. misalignment or from Refer to Drive Clutch Drags or Will clutch not fully dis- Not Disengage. engaging. Brake will not hold 1. Control linkage out of Adjust control linkage. adjustment. 2. Worn or wet brake Replace brake lining if worn. Dry brake lining. lining if wet. Brake will not re- Control linkage out of Adjust brake control linkage. lease adjustment. Brake grabs 1. Broken brake lining. Replace brake lining. 2. Grease on brake lining. Replace brake lining. Hoisting drum jerks 1. Stretched drive chains. Replace drive chains. or does not rotate 2. Damaged or worn Inspect drive gears. Replace if worn gears in drive assem- or damaged. bly. 3. Broken teeth on drive Replace drive sprockets. sprocket. 4. Damaged splines in Inspect clutch and replace any damaged clutch. parts. Excessive noise 1. Worn or damaged Inspect bearings. Replace any found when hoisting drum bearings. worn or damaged. is operated 2. Worn or damaged Replace worn or damaged gears. gears in drive assem- bly. 4-14

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