SECTION IV. INTERMEDIATE GENERAL SUPPORT TROUBLESHOOTING
4-6. Troubleshooting. Both a symptom index and a troubleshooting table are provided. The symptom index will help
you locate the information you need for troubleshooting.
LIQUID NOT BEING PUMPED OR NOT
ENOUGH LIQUID DELIVERED
MOTOR ASSEMBLY DRAWS TOO MUCH
PUMP NOISY OR VIBRATES
Table 4-1 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 4-1. Troubleshooting
Test or Inspection
Liquid not being pumped or not enough liquid delivered.
STEP 1. Check for obstruction in liquid passages.
Disassemble pump and remove obstructions (para. 4-9).
STEP 2. Check to see if impeller is blocked.
Disassemble pump and clean impeller (para. 4-9).
STEP 3. Check to see if impeller is damaged (bent, cracked, chipped, or
corroded, for example).
Replace impeller (para. 4-9).
STEP 4. Check to see if mechanical seal and sleeves are defective.
Replace seal and sleeves (para. 4-9).