Table 4-1. Troubleshooting - continued

Table 4-1. Troubleshooting - continued - TM-5-3820-256-24-1_39

Table 4-1. Troubleshooting - continued - TM-5-3820-256-24-1_41

TM-5-3820-256-24-1 Drilling System Manual
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Table 4-1. Troubleshooting - continued PROBLEM POSSIBLE CAUSE REMEDY Frequent or pre- 1. Scored rods or sleeves. Replace rods and sleeves. mature failure of the inlet manifold 2. Over pressure to inlet Reduce inlet pressure per instructions. seals. manifold. Short cup life 1. Damaged or worn Replace cylinders. chrome plating of the cylinders. 2. Abrasive material in Install proper filtration on pump inlet the fluid being pumped. plumbing. 3. Excessive pressure Check pressures and fluid inlet temper- and/or temperature ature; be sure they are within speci- of fluid being pumped. fied range. 4. Over pressure of Reduce pressure. pumps. 5. Running pump dry. Do not run pump without water. 6. Front edge of piston Replace with new piston. sharp. 7. Chrome plating of Install new cups and cylinders. Pump cylinders damaged only fluid compatible with chrome. causing excessive wear of cups. May be caused by pumping acid solution. Strong surging at Foreign particles in the Check for smooth lap surfaces on in- the inlet and low inlet or discharge valve let and discharge valve seats. Dis- pressure on the or worn inlet and/or dis- charge valve seats and inlet valve discharge side charge valves. seats may be lapped on a very fine oil stone; damaged cups and discharge valves cannot be lapped but must be replaced. FORCE FEED LUBRICATOR Feed rate too high Feed regulator set too Lower feed regulator setting. high. Feed rate too low 1. Feed regulator set Raise feed regulator setting. too low. 2. Clogged inlet strainer Remove and clean inlet strainer or inlet tube. and tube. 4-9

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