2.5.1.1 Manual Mode. (Continued)

Figure 2-19. Model 609-A Controls Used for Manual Operation

TM-10-4320-344-10 Pump Assembly Water 600 GPM Model 609-A (NSN 4320-01-184-7494) Model 609-C (NSN 4320-01-261-6470) Model US636HCCD-1 Manual
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TM 10-4320-344-10 2.5.1.1 Manual Mode. (Continued) WARNING If pump fails to take suction, pump can overheat. Overheated pump can cause severe burns. f . Turn MANUAL THROTTLE (6) counterclockwise until pump takes suction, as indicated by pressure reading on PUMP SUCTION gauge (3) or decrease in engine speed as indicated on ENGINE TACHOMETER/HOURMETER (10). If pump fails to take suction after 3 minutes, shut down engine by setting ENGINE SWITCH (5) to off position. Notify unit maintenance. Downline pumping assemblies can be damaged if 10 pounds per square inch (psi). Any pumping discharge pressure rises above 150 psi. suction pressure falls below assemblies may be damaged if Suction and discharge pressures will vary depending on operating conditions and engine speed. g . h. i . Monitor suction pressure on PUMP SUCTION gauge (3). Also monitor discharge pressure on PUMP DISCHARGE gauge (1). If suction pressure falls below 10 psi on any downline pumping assemblies or discharge pressure rises above 150 psi on all pumping assemblies, reduce engine speed to regain proper pressure as follows: (1) Turn MANUAL THROTTLE (6) clockwise to decrease engine speed. Decrease engine speed until reading on PUMP SUCTION gauge (3) and reading on PUMP DISCHARGE gauge (1) are within proper pressures. (2) If required, reduce engine speed to idle (1,000 rpm on ENGINE TACHOMETER/HOURMETER (10)) until problem is corrected. If required, use MANUAL THROTTLE (6) to control pump output by adjusting engine speed. Pump output is related to discharge pressure. Observe PUMP DISCHARGE gauge (1) and use MANUAL THROTTLE (6) to adjust engine speed. Turn MANUAL THROTTLE (6) counterclockwise to increase speed and discharge pressure. Turn it clockwise to decrease speed and discharge pressure. Perform “During” PMCS (Table 2-10). CAUTION Engine can be damaged if engine operating temperature rises above 220° F (104° C) or oil pressure falls below 10 psi Engine alarm will sound if engine operating (104° C) or oil pressure falls below 10 psi j . If engine alarm (2) sounds: (69 kPa). temperature rises above 220° F (69 kPa). CAUTION NOTE NOTE 2 - 90

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