CENTRIFUGAL PUMP UNIT (FRESH WATER BOOSTER) AND REDUCTION GEAR COOLING WATER)

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CENTRIFUGAL PUMP UNIT (FRESH WATER)

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

CENTRIFUGAL PUMP UNIT (FRESH WATER BOOSTER) AND REDUCTION GEAR COOLING WATER) - CONT

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

Troubleshooting - CONT

Table 2-2.

Malfunction

Test or Inspection

Corrective Action

CENTRAL PUMP UNIT (FRESH WATER) - CONT

Check start and stop pushbuttons on engine room console panel for

STEP 2.

online (main) or (standby) pump.

Reset pushbuttons to start either (main) or (standby) pump.

STEP 3. Check for improper control setpoint on pressure switch.

Ensure pressure switch turn ON/OFF respective (main) or (standby) pump when

tank pressure rises to and drops below the control setpoint.

Check for loose connection(s) or defective electrical wires/cable(s)

STEP 4.

between engine room console panel and pump motor.

Tighten loose connection(s). Replace electrical wires/cable(s).

(TM 55-1905-223-24-1812).

STEP 5. Check for defective motor.

Replace motor, para. 2-95.

57. Noisy pump/motor operation.

STEP 1. Check for air or gas in liquid.

Identify source and correct problem.

STEP 2. Check for liquid vortexing (cavitation) in casing.

Release trapped air from pump casing.

STEP 3. Check for dry bearings.

Grease pump/motor bearing(s) (Lo 55-1905-223-12).

STEP 4. Check for loose or broken mounting bracket and bolts.

Tighten loose mounting bracket. Replace bracket/bolts.

STEP 5. Check for damaged pump/motor.

Replace pump/motor, para. 2-95.

CENTRIFUGAL PUMP UNIT (FRESH WATER BOOSTER) AND

(REDUCTION GEAR COOLING WATER)

58. 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.

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