Table 4-3A. Portable Fire Pump (PE-250) - Pump Troubles

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Table 4-2A. Portable Fire Pump (PE-250) - Running Troubles - continued

TM-55-1905-220-14-8 Landing Craft Utility LCU 1671-1679 NSN 1905-01-009-1056 Manual

Table 4-3A. Portable Fire Pump (PE-250) - Pump Troubles - continued

TM 55-1905-220-14-8

4-5. GENERAL (Continued).

Table 4-3A. Portable Fire Pump (PE-250) - Pump Troubles

NOTE

Tables 4-1A thru 4-3A apply to the Prosser PE250 electric start portable fire

pump. Tables 4-1 thru 4-4 apply the Gale Marine P-250 portable fire pump.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Pump primes slowly or not at all.

Step 1. Air leaking into the priming system or suction hose.

Determine location of air leakage - perform hydrostatic leakage test in paragraph 4-7Ac(2).

Step 2. Defective check valve in exhaust cooling line.

Remove and replace check valve.

Step 3. Defective priming switch.

Remove and replace priming switch.

2. Magnetic clutch slipping.

Step 1. Clutch slipping.

Step 2. Defective magnetic clutch.

Remove and replace magnetic clutch, refer to paragraph 4-7.5A.

Step 3. Defective priming pump pulley.

Replace magnetic clutch, refer to paragraph 4-7.5A.

Step 4. Improper fan belt tension.

Check fan belt tension.

Step 5. Defective priming pump.

Repair or replace priming pump, refer to paragraph 4-7.5A.

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