TM 11-6780-225-35
a. Disassembly.
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)
b.
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