ROTARY PUMP UNIT (FUEL OIL TRANSFER) PRELUBRICATING OIL TRANSFER) AND (DIRTY LUBRICATING OIL)

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CENTRIFUGAL PUMP UNIT (AUXILIARY SEAWATER COOLING)- UNIT

TM-55-1905-223-24-18-1 Landing Craft Utility (LCU) NSN 1905-01-154-1191 Basic Craft Part 1 Manual

GYRO INTERFACE ASSEMBLY

TM 55-1905-223-24-18-1

Troubleshooting - CONT

Table 2-2.

Malfunction

Test or Inspection

Corrective Action

CENTRIFUGAL PUMP UNIT (AUXILIARY SEAWATER COOLING) - CONT

STEP 5. Check for damaged pump/motor.

Replace pump/motor, para. 2-99.

ROTARY PUMP UNIT (FUEL OIL TRANSFER)

(PRELUBRICATING OIL TRANSFER)

AND (DIRTY LUBRICATING OIL)

64. Low discharge pressure.

STEP 1. Check for liquid vortexing (cavitation) in casing.

Release trapped air from pump casing.

STEP 2. Check for air or gas in liquid.

Identify source and correct problem.

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 gauge cutoff valve fully open.

STEP 5. Check for partially clogged pressure line or defective pressure gauge.

Clean pressure line. Replace pressure gauge.

STEP 6. Check for air leak(s) in suction piping.

Tighten loose connection(s) in suction piping.

STEP 7. Check pump/motor for wrong direction of rotation.

Wire motor per instructions given on motor nameplate/decal.

STEP 8. Check for defective pump.

Replace pump, para. 2-101.

65. Pump motor not running.

STEP 1.

Check for open pump motor circuit breaker.

Reset circuit breaker for No. 1 fuel oil transfer pump at AUX MCHRY MCC

and START/STOP pushbutton and an emergency STOP switch at the pump.

Reset circuit breaker for No. 2 fuel oil transfer pump at emergency

switchboard 240 V distribution and START/STOP pushbutton controller and

an emergency stop pushbutton.

Reset circuit breaker for (prelubricating oil transfer) pump at AUX

MCHRY MCC and START/STOP pushbutton controller adjacent to pump.

2-128