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
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