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 TM 55-1905-223-24-18-1
Troubleshooting - CONT
Table 2-2.
Malfunction
Test or Inspection
Corrective Action
CENTRIFUGAL PUMP UNIT (FRESH WATER ROOSTER) AND
(REDUCTION GEAR COOLING WATER) - CONT
STEP 3. Check for partially closed pump suction valve.
Ensure pump suction valve fully open.
STEP 4. Check for partially closed discharge pressure gauge cutoff valve.
Ensure discharge pressure gage cutoff valve fully open.
STEP 5.
Check for partially clogged pressure line or defective discharge
pressure gauge.
Clean pressure line. Replace pressure gauge.
STEP 6. Check for partially closed hot water heater inlet/outlet valves.
Ensure hot water heater inlet/outlet valves fully open.
STEP 7. Check for air leak(s) in suction piping.
Tighten loose connection(s) in suction piping.
STEP 8. Check hydropneumatic pressure tank for leak(s).
Tighten loose connection(s).
STEP 9. Check for partially clogged pump casing and discharge piping.
Flush pump casing with clean water. Clean trap/strainer in discharge
piping (TM 55-1905-223-24-1819).
STEP 10. Check pump/motor for wrong direction of rotation.
Wire motor per instructions given on motor nameplate/decal.
STEP 11. Check for defective pump.
Replace pump, para. 2-97.
59. Pump motor not running.
STEP 1. Check for open pump motor circuit breaker.
Reset circuit breaker for (reduction gear cooling water) pumps No. 1 and
No. 2 at AUX MCHRY MCC.
STEP 2.
Check start and stop pushbuttons on motor controllers adjacent to each
pump motor.
Reset pushbutton to start pump(s) as required.
STEP 3.
Check for loose connection(s)/defective electrical wires/cable(s)
between AUX MCHRY MCC.
Tighten loose connection(s). Replace electrical wires/cable(s).
(TM 55-1905-223-24-1812).
2-125
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