Section V. GENERAL

If the lamp is not faulty, check the power supply and the

179. Troubleshooting

power circuit through the circuit breaker.

Refer to fig. 71.20 for probable causes and

remedies for malfunctions in the winterization kit. The

f. If these steps fail to localize the trouble, check

troubleshooting chart is applicable to both the liquid and

the operation of the preheater, the preheat relay, the

fresh air heaters. Refer to applicable paragraphs for

power relay, and other electrical components.

additional tests to further analyze malfunctions which

may occur within specific components.

181. Fuel System Test

Make certain the feed line shut-off valve is

180. Electrical System Test

open.

Make certain power supply is adequate for the

b. Check the fuel supply. Make certain the fuel is

unit.

the proper type for the heater and that it is not

Check all electrical connections for tightness

contaminated.

and good condition.

If the fuel pump is not operating, test as

Check limit switch. If switch is open, correct

described in paragraph 201.

the reason for overheating of the heater combustion

If the fuel pump is operating, disconnect the

chamber. Reset limit switch manually.

pump outlet connections and check for fuel flow. If flow

Check the circuit breaker reset button position

does not occur, check the fuel lines for obstructions.

on the control box. The power supply circuit is closed

Make sure the fuel filter is clean.

when the button is pushed in. If the button jumps out

e. If a flow occurs, reconnect the pump outlet and

when the heater is started, test further for the electrical

remove the regulator valve and the nozzle assembly.

failure.

Test the operation of these units as described in

Press in "press-to-test" indicator lamp on the

paragraphs 192(d) and 193(b).

control box. If the power supply circuit through the

circuit breaker is complete, the lamp light. If the lamp

does not light, make certain the lamp is not burned out.

Section V. GENERAL

Note

182. General

Repair procedures which are standard or

Part numbers for items in this

obvious may be excluded from this supplement. In

section are included in the TM 5-

instances where specific instructions have been omitted,

4210-205-35 Supplement Parts List.

procedures shall be performed in accordance with good

mechanical practices.

Section VI. BODY CHASSIS OR HULL AND ACCESSORY ITEMS

185. Radiator Shutter Assembly

183. Oil Pan Box Assembly

Repair consists of replacement of defective

Refer to TM 5-4210-205-12

for

repair

components.

Refer to fig.

71.21 for assembly

procedures.

sequence.

184.

Oil Pan and battery Box Heat Exchanger

186. Heater Control Box Assembly

Assembly

(fig. 71.22)

Refer to TM 5-4210-205-12 for repair

Remove the two screws (14) on each side of the

procedures.

nameplate (13) and separate the box assembly (10)

AG0 5667A