Removal and Replacement of Faceplate

TM 11-6720-242-35

130

Gear (MP193)

115

Retaining ring (MP338)

131

Pin (MP352)

116

Belt (MP124)

132

Shim (MP367)

117

Retaining ring ('P&335)

133

Bearing (MP147)

118

Bearing (MIP136137)

134

Shaft (MP196)

119

Linkage gear (MP383)

135

Spacer (MP94)

120

Trunnion (MP406)

136

Gear assembly (MP192)

121

Screw (H39)

137

Pin (MP194)

122

Pulley (MP389)

138

Gronet (MP199)

123

Pin (MP280)

139

Terminal block (TB1)

124

Retaining ring (MP336)

140

Washer (H69)

125

Shim (MP366)

141

Screw (H23)

126

Bearing (MP138-139)

142

Harness (W1)

127

Shaft (MP388)

143

Screw (MP341)

128

Pinion (MP385)

198

Housing (MP204)

129

Pin (MP195)

Figure 3-4(5)-Continued.

c. Disassembly. Disassemble the interface board

rect support personnel are contained in paragraphs 3-32

through 3-38.

assembly as shown in, figure 3-14.

b. The removal of the lighting plate (para 332) is

3-34. Removal and Replacement of Extra Picture

necessary to gain access to the nuts and screws

Switch 55 (fig. 3-13)

securing the various switches, indicators, and frames

a. Removal.

remaining counter to subassembly backing plate.

3-32. Removal and Replacement of Faceplate (fig. 3-

(1) Remove cover (3) by loosening two

13)

screws (53).

a. Removal. Remove the four screws (2) securing

(2) Remove faceplate (1) (para 3-32).

the faceplate (1) to backing plate (14). The location of

(3) Loosen nut (11), inside the chassis.

the electrical connector J3 is indicated by a cross mark

(4) Rotate pushbutton (13) counterclockwise,

on the face of the faceplate. Separate the connectors

by hand, to detach it from the switch (10). Remove

with care when removing the faceplate.

switch and lockwasher (12).

(5) Tag for identification and then unsolder

b. Replacement. The procedures for installing the

the three wires connected to the switch terminals.

faceplate are the reverse of the removal procedures.

b. Replacement.

3-33. Removal, Replacement, and Disassembly of

(1) Solder a jumper, consisting of Type S,

Interface Board Assembly (fig. 3-13)

No. 22 AWG, tempered soft or drawn and annealed tin

a. Removal.

coated wire, across switch terminals 2 and 3.

(2) Solder the three wires to the switch

terminals as designated on the tags attached at the time

(1) Remove cover (3) by loosening two

of the switch removal.

captive screws (53).

(3) Thread nut (11) on switch (10), slide on

(2) Remove four screws (4), flat washers (5),

lockwasher (12), and insert the switch through backing

and lockwashers (6) securing interface board assembly

plate (14).

(7) to chassis (8).

(4) Thread pushbutton actuator (13) on, the

(3) Withdraw the board assembly to

switch (10) and hand tighten it until it's flush with

disengage the contacts from connector 3J4 (9).

backing plate (14). Then tighten nut (11) inside the

b. Replacement.

chassis until switch is held securely in place.

(1) Install interface board assembly (7) in

3-35. Removal and Replacement of POWER Switch

reverse order of the removal procedure.

S1, OPERATE Switch S2, and V/H SEL Switch S3

(2) Apply silicone grease on the mounting

surface of the board assembly (7) and the chassis angle

(fig. 3-13)

on which the board rests. Coat the screw threads with

The removal procedures of toggle switches (15, 20, and

glyptal.

21) are identical except for the wiring.

Change 3

3-25