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TM 55-1905-223-24-12
Section IV. INTERMEDIATE GENERAL SUPPORT TROUBLESHOOTING
4-9. 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
(Table 4-2)
AUXILIARY FIRE PUMP
Liquid not being pumped
Item 5
Overload on Driver
Item 6
Pump noisy or vibrates
Item 7
CENTRIFUGAL PUMP UNIT
Liquid not being pumped
Item 1
Low pump discharge pressure
Item 3
Not enough liquid delivered
Item 2
Pump takes too much power
Item 4
Table 4-2 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 4-2. Intermediate General Support Troubleshooting
Malfunction
Test or Inspection
Corrective Action
CENTRIFUGAL PUMP UNIT
1.
Liquid not being pumped.
STEP 1. Check to see if impeller is completely plugged.
Disassemble pump and clean impeller (para. 4-15).
STEP 2. Check for chipped, bent, or cracked wear rings.
Disassemble pump and replace wear rings (para. 4-15).
4-3

 


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