Table 4-1. Troubleshooting - continued

Table 4-1. Troubleshooting - continued - TM-5-3820-256-24-1_36

Table 4-1. Troubleshooting - continued - TM-5-3820-256-24-1_38

TM-5-3820-256-24-1 Drilling System Manual
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Table 4-1. Troubleshooting - continued PROBLEM POSSIBLE CAUSE REMEDY Oil leakage - 4. Internal shaft seal Replace seal. continued worn or damaged. 5. Worn coupling shaft Replace coupling shaft and seal. and internal seal. Significant loss of 1. Lack of sufficient oil (a) Check for faulty relief valve speed under load supply. and adjust or replace as required. (b) Check for and repair worn pump. (c) Check for and use correct oil for temperature of operation. 2. High internal motor Replace worn rotor set. leakage. 3. Severely worn or dam- Replace rotor set, drive link and aged internal splines. coupling shaft. 4. Excessive heat. Locate excessive heat source in the system and correct the condition. 5. Loose V-belt. Tighten V-belt or replace. Low mechanical 1. Line blockage Locate blockage source and repair efficiency or undue or replace. high pressure re- quired to operate 2. Internal interference. Disassemble unit, identify and reme- motor dy cause and repair, replacing parts as necessary. 3. Lack of pumping Check for and repair worn pump. pressure. 4. Excessive binding or Locate source and eliminate cause. loading in system. Pulsation 1. Belt slippage. Tighten or replace, use correct belt. 2. Air leak in inlet plumb- Disassemble, reseal, and reassemble. ing. 4-6

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