Unit Mechanical Troubleshooting - continued

TM 9-2320-386-24-1-1

0010 00

Unit Mechanical Troubleshooting (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

PERSONNEL FUEL BURNING HEATER/POWER PLANT HEATER KIT

54. HEATER WILL NOT OPERATE IN HIGH OR LOW POSITION

Refer to Electrical Troubleshooting, WP 0011 00.

55. HEATER WILL NOT OPERATE

WARNING

Diesel fuel is flammable. Do not perform fuel system procedures

near open flame. Injury or death to personnel may result.

Compressed air source will not exceed 30 psi (207 kPa). When

cleaning with compressed air, eyeshields must be worn. Failure to

wear eyeshields may result in injury to personnel.

Step 1. Refer to Electrical Troubleshooting, WP 0011 00.

Step 2. Check fuel shutoff valve and ensure it is in full ON position.

If fuel shutoff valve is damaged (or stuck in OFF or partial ON position), replace fuel

shutoff valve (TM 9-2320-361-20).

Step 3. Check heater fuel filter for contamination.

If water or contamination is present, clean and flush entire fuel system. Dry with

compressed air (TM 9-2320-386-10).

Step 4. Check fuel lines for breaks, bends, kinks, or leaking joints.

If broken, kinked, or if leaky joints are found, refer to TM 9-243.

Step 5. Check fuel pump discharge.

a. Remove fuel line from fuel pump output.

b. Use clean container for fuel discharge recovery.

c. Position heater control box to RUN position.

d. If fuel pump fails to pump adequate amount of fuel, 1/2 pint (0.24 L) in 30 seconds,

replace fuel pump (WP 0249 00).

Step 6. Inspect exhaust system for restrictions.

If exhaust pipe is restricted or damaged, repair or replace exhaust pipe (WP 0251 00).

Step 7. If fuel burning heater still fails to operate, replace fuel burning heater (WP 0247 00).

Step 8. Check for proper operation of defroster and heat diverter control cables (TM 9-2320-386-10).

If control cables or vent are broken, replace (WP 0242 00).

END OF TESTING!

END OF WORK PACKAGE

0010 00-18