HEATER ELEMENTS - TM-5-4120-383-140147

TM5-4120-383-14

HEATER ELEMENTS.-Continued

4-35.

Allow heaters to cool before touching.

Severe burns

can result from touching hot heaters.

(2) Remove three top covers (para 4-11).

(3) To gain access to terminal board TB2 where heater element

leads are connected the junction box and control module must also

(See para 4-21 and 4-27.)

be removed.

(4) Visually inspect each heater for obvious damage,

deformation, cracked or broken sheath, burnt out spots, and loose,

broken, or otherwise damaged leads.

(5) Using a multimeter check continuity of each heating

element.

Continuity should be indicated.

Removal.

(1) Tag and disconnect leads from terminal board TB2.

(2) Remove two screws, lock washers, and flat washers and

remove heater support.

(3) Remove attaching hardware from heater mounting bracket.

(4) Slip bracket up enough to gain access to top heater.

(5) Remove retaining nut, lock washer, flat washer, and

insulating washer and slip heater out of bracket.

(6) Remove remaining heaters using same methods as (4) and

(5) above.

c. Cleaning.

Use a clean dry cloth to wipe dust and dirt from

heaters.

Do not use solvent or detergent.

Replace.

Replace any defective heater elements.

Installation.

(1) Position heater mounting bracket into top of unit so

heaters can be mounted one at a time.

(2) Start with bottom most heater to be installed.

4-97