TM 10-4320-344-102.5.2.1 Manual Mode.(Continued)CAUTIONDownline pumping assemblies can be damaged if suction pressure falls below10 psi.Any pumping assembly can be damaged if discharge pressure risesabove 150 psi.Suction and discharge pressures will vary depending on operating conditionsand engine speed.i .j .k .ToMonitor suction pressure on PUMP SUCTION PRESSURE gauge (8) .Also monitordischarge pressure on PUMP DISCHARGE PRESSURE gauge (1).I f s u c t i onpressure falls below 10 psi or discharge pressure rises above 150 psi,reduce engine speed to regain proper pressure as follows:(1) Turn MANUAL THROTTLE (6) counterclockwise to decrease engine speed.Decrease engine speed until reading on PUMP SUCTION PRESSURE gauge (8)and reading on PUMP DISCHARGE PRESSURE gauge (1) are within properpressures.(2) If required, reduce engine speed to idle (650 rpm on ENGINE SPEEDindicator (9)) until problem is corrected.If required, use MANUAL THROTTLE (6) to control pump output by adjustingengine speed.Pump output is related to discharge pressure.Observe PUMPDISCHARGE PRESSURE gauge (1) and use MANUAL THROTTLE (6) to adjust enginespeed.Turn MANUAL THROTTLE (6) clockwise to increase engine speed anddischarge pressure.Turn it counterclockwise to decrease engine speed anddischarge pressure.Perform “During” PMCS (Table 2-11).prevent damage to engine,f u l l - l o a d r u n n i n g .l .Shut down Model 609-C as(1)(2)(3)(4)To stop engine, turnengine idle for 2 orCAUTIONDO NOT shut down engine suddenly fromf o l l o w s:MANUAL THROTTLE ( 6 ) f u l l y c o u n t e r c l o c k w i s e . L et3 minutes.Set ENGINE switch (2) to STOPp o s i t i o n.Engine will shut down.Unlock AUTO DEFEAT handle (5), push fully in, and lock in thisp o s i t i o n.Set MAIN POWER switch (7) to OFF position.Close control panel door.m.Perform "After" PMCS (Table 2-11).2.5.2.2 AutomaticMode.Refer to Figure 2-25 and start and operate pumping assembly asf o l l o w s:a.Perform “Before” PMCS (Table 2-11).b.Turn MANUAL THROTTLE (8) fully clockwise.2-100NOTE
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