Table 4-1. Troubleshooting - continued

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

Table 4-1. Troubleshooting - continued - TM-5-3820-256-24-1_48

TM-5-3820-256-24-1 Drilling System Manual
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Table 4-1. Troubleshooting - continued PROBLEM POSSIBLE CAUSE REMEDY CHAIN FEED DRIVE MOTOR Motor fails to 1. System leakage - loose Inspect and tighten port connections start connections or broken and lines. lines. 2. No fluid - inadequate Check fluid level in reservoir. Replen- fluid supply at inlet or ish as necessary. in system. 3. System return line or Check drain filter. Clean and/or re- drain line restricted. place filter element. 4. System inlet line re- Check all strainers and filter for dirt stricted. and sludge. Clean if necessary. 5. Fluid viscosity too Completely drain the system. Add heavy to pick up prime. new filtered fluid of proper viscosity. 6. Air in system. Tighten any loose connections. Bleed air from highest point in system and replenish fluid. 7. Drive train damaged. Check and repair drive train. 8. Pump driven in wrong Drive direction must be reversed im- direction. mediately to prevent seizure. 9. Pump coupling or shaft Check shaft engagement and damage. sheared. Replace the necessary parts. 10. System relief valve Disassemble and clean the valve with stuck open. solvent. Use pressure gauge to adjust the relief valve. 11. Pump or motor binding. Remove and disassemble the unit. Check for correct assembly of parts. Also check for dirt or metal chips. Clean the parts thoroughly and re- place any damaged parts. Motor not devel- 1. Insufficient pump Check pump drive speed. oping sufficient speed. speed or torque 2. Insufficient fluid pres- Check delivery of pump. Make cer- sure. tain sufficient hydraulic fluid is avail- able to the pump. 3. System overload relief Check pressure and reset relief valve. valve set too low. 4-16

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