Replacement of Lamps

TM 9-1240-369-34

(8) Install access over as instructed in

(7) Install new indicator light by performing

paragraph 3-9 a steps (2) and (3).

steps (2) thru (5) in reverse order.

f. Replacement of Lamps (see fig. 3-4). The

(8) Install access cover as instructed in

paragraph 3-9 a steps (2) and (3).

following steps are applicable to replacement of lamps in

h. Replacement of DMR Switch S1, TSW Switch

pushbutton switches S4 thru S6.

S2, and Switch Lens Seal (39) (see fig. 3-1). The

(1) Unscrew and remove switch lens seal (21)

following steps are applicable to either switch and switch

from housing.

lens seal (39).

(2) Pull application switch lens (22, 23, or 24)

(1) Remove access cover as instructed in

straight out from switch.

paragraph 3-9 a.

(3) Remove lamp (30).

(2) Unscrew and remove switch lens seal (39)

(4) Install new lamp (30), and applicable

from housing.

switch lens (22, 23, or 24).

(3) Tag all leads to the switch for

(5) Install switch lens seal (21) to housing.

g. Replacement of Indicator Lights DS4 thru DS8

identification. Unsolder the leads.

and Preformed Packings (see fig. 3-4). The following

(4) Remove seal adapter (40), lockwasher

(41), key washer (42) and preformed packing (43) from

steps are applicable to each indicator light (33 thru 37)

switch S1 (44) or switch S2 (45).

and performed packings

(5) Lubricate preformed packing (43) by

(1) Remove access cover as instructed in

applying a thin, Uniform, film of grease, MIL-G-4343.

paragraph :3-9 a step (1).

(6) Install new switch lens seal and switch by

performing steps (2) thru (4) in reverse order.

NOTE

(7) Install access cover as instructed in

Readout indicator assembly (13) must

paragraph 3-9d steps (2) and (3).

be removed only when replacing

indicator lights (30, 31, and 32).

3-10. Inspection of Commander's Control Unit (A79).

a. Inspect the general condition of all parts. Check

(2) Remove readout circuit assembly (13) as

for wear or other conditions indicating deterioration.

described in paragraph :3-9 c.

b. Inspect lens filter. indicators, switches, and

(3) Tag all leads to the switch for

screws for corrosion; check machine surfaces for

identification. Unsolder respective indicator light leads.

conditions that may prevent alinement with mating parts:

(4) Remove nut (31) and lockwasher (32)

check lens filter for scratches and all switch lens seals

from back of faulty, indicator light.

for holes or tears.

(5) Push fault indicator light (33 thru 37) out

c. Check electrical wiring for chafed or broken

through front panel. Retain preformed packing (38).

wires and bad solder connections.

(6) Lubricate preformed packing (38) by

d. Inspect machined sealing surfaces for scratches.

applying a thin, uniform film of grease, MIL-G4-4343.

debris or excessive lubricant that may prevent proper

Apply hand to entire surface of the preformed packing.

sealing.

Section VI. REPAIR OF HEADREST ASSEMBLY

support (3). When installing new headrest, secure

3-11. Disassembly of Headrest Assembly (See fig. 3-

headrest to support with two screws. Seal the screws

5).

with sealing compound, MIL-S-11031, and torque to 50

The repair of the headrest assembly is limited to

inch-pounds.

replacing the headrest. The headrest is replaced by

removing two screws (1) which secure headrest (2) to

3-14