TEST - TM-5-4320-300-14

TM-5-4320-300-14 Pump Centrifugal Self-Priming Gasoline Engine Driven; 6-Inch 1500 GPM Capacity At 60 Foot Head Manual
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TM 5-4320-300-14 4-34. LOW OIL PRESSURE CUTOUT SWITCH (CONT) Location/Item Action Remarks TEST 1. Low oil Tag wires on switch for pressure easy identification during cutout reconnection. Remove switch nuts and wires from switch terminals. Using a mul- timeter, test switch as follows: a. Select OHMS function on meter and plug leads into OHMS jacks. Turn range switch to RX10 scale. Short the two leads together and set the indicator pointer to zero ohms. b. Simultaneously touch one lead to each termi- nal. Meter shall indicate INFINITY (NO CONTINUITY). c. While holding leads to terminals, crank engine to produce 10 psi reading on oil pressure gage. At 10 psi oil pres- sure the switch should close (meter reads 0). If meter does not indicate 0 (zero) at 10 psi oil pressure, replace switch. If switch operation is satisfactory, connect wires to appropriate terminals on switch, install nuts and tighten securely. 4-139

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