Quantcast SECTION IV. UNIT TROUBLESHOOTING - TM-55-1905-223-24-130015

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TM 55-1905-223-24-13
SECTION IV. UNIT TROUBLESHOOTING
2-10.  Troubleshooting. Both a symptom index and a troubleshooting table are provided. The symptom index will
help you locate the information you need for troubleshooting.
SYMPTOM INDEX
Troubleshooting
Procedure
LIQUID NOT BEING PUMPED AND DELIVERED
Item 1
NOT ENOUGH PRESSURE
Item 2
PUMP OPERATES FOR SHORT TIME THEN STOPS
Item 3
PUMP DRAWS TOO MUCH AMPERAGE
Item 4
PUMP NOISY OR VIBRATES
Item 5
Table 2-2 lists the common fault conditions that may be found during operation or maintenance of the equipment. Look
for causes and do corrective actions in the order listed. This manual cannot list every symptom that may show up, and it
cannot list all the possible-causes and corrective actions. If a symptom is not listed, or if it keeps up after you have
performed the corrective actions, notify your supervisor.
Table 2-2. Troubleshooting
Malfunction
Test or Inspection
Corrective Action
1.
Liquid not being pumped.
STEP 1.
Check for loss of prime.
a.
Fill pump and suction pipe completely with liquid.
b.
Correct leaks in suction pipe joints and fittings.
c.
Vent casing to remove accumulated air.
STEP 2.
Check to see if suction lift is too high.
Remove obstructions from inlet (Item 3, PMCS).
STEP 3.
Check to see if discharge head too high.
Open valves in discharge piping.
STEP 4.
Check for low motor speed.
Make sure motor is directly across-the-line and receiving full voltage
STEP 5.
Check to see if motor is rotating in the right direction.
Inspect wiring for proper connections.
2-4


 


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