Disassembly.

TM 11-6780-225-35

a. Disassembly.

(1) Remove knobs (1), screws (2), nuts (3),

speaker plate (4), speaker (5), and intercom cover (6).

(1) Remove screws (1), washers (2),

Tag and unsolder wires as required for disassembly.

lockwashers (3), and air intake cover (4).

(2) Remove talk bar (15) and talk bar plate

(2) Remove screws (5), washers (6),

(16), by removing attaching parts (7) through (14).

lockwashers (7), and case (8).

(3) Remove screws (17), nuts (18) and OFF-

(3) Remove screws (9), washers (10), nuts

ON volume control (19).

(11), and humidistat assembly (12). Tag and disconnect

(4) Remove nut (20), station selector (21),

all wiring as required.

and bracket (22).

(4) Remove spiral tube evaporator assembly

(5) Remove screws (23) and (24), rectifier

(18) with attaching parts (13) through (17).

diode (25), insulator (26), angle (27), and chassis (28).

(5) Remove condenser coil (27) with attaching

b. Cleaning and Inspection.

parts (19) through (26).

(1) Inspect mechanical components for

(6) Remove automatic expansion valve (39)

cracks, dents, and damaged screw threads.

with attaching parts (28) through (38) and clamp (40).

(2) Inspect electrical components for apparent

Remove condenser and evaporator coil bracket (41).

insulation breakdown, loose connections, and possible

(7) Remove screw (42), fan running capacitor

shock hazards.

(43), and clamp (44).

(3) Clean all components as required using

(8) Remove venturi fan assembly (47) with

cleaning compound and stiff bristle brush.

screws (45), washers (46), and nuts (46A).

c. Assembly.

(9) Remove compressor (53) by removing

(1) Install chassis (28), angle (27), insulator

attaching parts (48) through (52).

(26), and rectifier diode (25) with screws (23) and (24).

(10) Remove discharge vibration eliminator

(2) Install bracket (22) and station selector

(54) and suction vibration eliminator (55).

(21) with nut (20) and screws (17).

(11) Remove expansion valve (59) with screw

(3) Install OFF-ON volume control (19) with

(56), washer (57), and clamp (58).

nut (18).

(12) Remove frame (61) with nuts (60).

(4) Install talk bar (15) and talk bar plate (16)

Cleaning and Inspection.

with attaching parts (7) through (14).

(1) Inspect mechanical components for

(5) Solder all wires according to their tag

cracks, dents, and damaged screw threads.

references. Install speaker (5), speaker plate (4), and

(2) Inspect electrical components for apparent

intercom cover (6) using nuts (3) and screws (2). Install

insulation breakdown, loose connections, and possible

knobs (1).

shock hazards.

(3) Clean all components as required using

cleaning compound and stiff bristle brush.

NOTE

c. Assembly.

The reference designations of the

(1) Install frame (61) with nuts (60).

items in figure 3-7 are Prefixed by A3A1.

(2) Install expansion valve (59) with clamp

3-18. Dehumidifire Repair (fig. 5-10)

(58), washer (57), and screw (56).

(3) Install suction vibration eliminator (55) and

WARNING

discharge vibration eliminator (54).

Always

release

pressurized

(4) Install compressor (53) with attaching

refrigerant charge from refrigerant

parts (48) through (52).

circuit before making repairs to

(5) Install venturi fan assembly (47) with

refrigerant lines or components

screws (45), washers (46), and nuts (46A).

under pressure. Always work in a

(6) Install fan running capacitor (43) with

well ventilated area. Make certain

clamp (44) and screw (42).

that all electrical power has been

(7) Install condenser and evaporator coil

removed.

bracket (41).

(8) Install automatic expansion valve (39)

3-17