Table 4-1. Troubleshooting - continued

Table 4-1. Troubleshooting - continued - TM-5-3820-256-24-1_47

Table 4-1. Troubleshooting - continued - TM-5-3820-256-24-1_49

TM-5-3820-256-24-1 Drilling System Manual
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Table 4-1. Troubleshooting - continued PROBLEM POSSIBLE CAUSE REMEDY Motor not devel- 4. Motor requiring ex- Remove motor and check torque re- oping sufficient cessive torque. quirements of driven shaft. speed or torque - continued 5. Parts of motor cart- Remove motor for overhaul. ridge scored due to excessive pressure or foreign matter in oil. Motor turning in 1. Improper port connec- Reverse port connections or shift wrong direction tions or control. valve. 2. Components in system Check complete system for proper not functioning as in- operation. tended. Motor noisy 1. Air in system. Bleed air from highest point in sys- tem and replenish fluid. 2. Motor internally dam- Remove motor for overhaul. aged. 3. Noise from other sys- Check complete system for proper tem components tele- operation. graphing back through lines and emerging from motor. External leakage Worn seals or cut "O" Install new seals and "O" rings. from motor rings. Motor shaft con- Control valve is not Check control valve for correct spool tinuing to rotate functioning properly. and leakage. when control is in "OFF" position Table 4-2. Air Compressor Troubleshooting PROBLEM CHECK & CORRECTION (Refer to figure 4-1) 1. Failure to Engage Compressor a. Check for truck air system pressure PSI (No. 31). If low, compressor relay is disconnected. After the air supply pressure is restored, reset Tattletale button on relay No. 34. b. Check power on the contact NC relay No. 34. c. Check connection and power to the solenoid valve No. 6. d. See troubleshooting for air compressor drive clutch (table 4-1). 4-17

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