Table 19. Fuel Tank (M49A2C) Troubleshooting Procedures.

TM 9-2320-361-24-1

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MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd)

WARNING

Diesel fuel is flammable. Do not perform troubleshooting checks

near open flame, sparks, or electricity. Injury or death to

personnel may result.

Table 19. Fuel Tank (M49A2C) Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Inspect transfer PTO for proper

If transfer PTO is inoperative,

1. FUEL DOES NOT PUMP

operation.

check PTO linkage for proper

FROM COMPARTMENTS,

adjustment (WP 0133 00).

OR PUMPS SLOWLY

2. Check discharge valve operation

Replace discharge valve

(WP 0264 00).

(WP 0263 00).

3. Check delivery pump propeller

If propeller shaft is broken or

shaft for breaks and damaged

universal joints need replacement,

universal joints.

replace (WP 0292 00).

4. Perform fuel filter separator

If fuel filter separator is restricted,

check (TM 9-2320-361-10).

replace filter (WP 0286 00).

5. Check delivery pump strainer for

1. If restricted, clean or replace

restrictions.

delivery pump strainer

(WP 0284 00).

2. If fuel filter separator is not

restricted and fuel pressure is

low, replace delivery pump

(WP 0280 00).

1. Perform fuel filter separator

If fuel filter separator is restricted,

2. DELIVERY PUMP

check (TM 9-2320-361-10).

replace filter (WP 0286 00).

DISPENSES FUEL

SLOWLY FROM BOTH

NOTE

TANKS

2. Check delivery pump strainer for

If No. 2 diesel fuel is being used

restrictions.

and ambient air temperature is

32 F (0 C), the outlet pressure

could be as low as 5 psi (34.5 kPa).

(See TM 9-2320-361-10 for fuel

filter separator inlet and outlet

pressure differences.)

1. If restricted, clean or replace

delivery pump strainer

(WP 0284 00).

2. If fuel system is clean and

pressure is low, replace delivery

pump (WP 0280 00).

If control linkage is damaged,

3. Check PTO speed control linkage

repair or replace (WP 0347 00).

for proper operation and

adjustment (WP 0347 00).

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