TM 3-6665-302-34
NOTE
(5) Insert tang of lever (2) in slot of bracket
assembly (5).
The bent end of spring (62) fits into a
hole in the chassis subassembly (56). The
(6) Insert screw (1) through lever (2) and
free end of spring (62) must be below
spring (3).
pin on bellcrank assembly (66).
(7) Using figure 3-1 as a guide, solder
(5) Insert shaft assembly (67) through bot-
wires to switches (6 and 8) and resistor (7).
tom of chassis subassembly (56). When shaft
(8) Coat soldered connection with sealant
emerges in the clip (53), install washer (50),
from coating kit (item 6, table 1-1).
spring (49), and washer (48) on end of shaft
(9) Tighten screw (1) until switch (8)
assembly (67 ).
closes (click). Loosen screw (1) slightly until
(6) Compress spring (49) with a small
switch opens (another click ). Then loosen screw
screwdriver, or other tool, and install retaining
(1) one additional quarter turn.
ring (47), detent (46), and retaining ring (45) on
the end of the shaft assembly (67).
d. Installation.
(7) Install chassis assembly in case top as-
(1) Position switch assembly (5, fig. 3-21
sembly (para 337).
) on posts (2).
(2) Loosely secure with screws (4) and lock-
4-13. Switch Assembly
washers (3).
a. Removal.
e. Alinement.
(1) Remove chassis assembly (para 3-36).
(1) Install gage assembly from M74 test set
(2) Remove electronic module (TM 3-6665-
(TM 3-6665-260-14) as shown in figure 44.
225-12).
(2) Aline switch assembly (2) so resistor
(3) Remove screws (4, fig. 3-21
) and
shaft (3) is centered in gage assembly (5) hole.
washers (3).
(3) Tighten screws (1) to posts (4). Re-
(4) Unsolder wires from switches (6, fig.
check alinement.
NOTE
4-14. Branched Wiring Harness
Preface all reference designations with
NOTE
1A2A2A1.
Potting or sealant must be removed from
b. Disassembly.
some areas before removal of compon-
ents. Replace potting or sealant when
(1) Remove screw (1) and spring (3).
replacement components are installed.
(2) Remove lever (2).
a. Removal
(3) Remove nut (6B), lockwasher (4), and
washer (6A) to remove each switch (6 and 8).
(1) Remove chassis assembly (para 3-36),
(4) Loosen nut on resistor (7) and remove
(2) Remove switch assembly (para 4-13a).
resistor (7) and stop (9) from bracket assembly
(3) Remove cell block assembly (para 4-
(5).
10a).
c. Assembly.
(4) Remove heater module (para 4-11a).
(1) Loosen nut on resistor (7). Turn shaft
(5) Using figure 3-1 as a guide, unsolder
of resistor (7) fully clockwise.
wires from contacts marked A4P1, A4P3, and
(2) Place resistor stop (9) on bracket as-
A4P4, and tip jack (65A, fig. 3-21 ).
sembly (5). Position resistor (7) in notch as
(6) Remove thermostatic switches S1 and
shown in figure 4-3 with keying lugs engaging
S2 (para 4-9a).
holes in bracket assembly (5) and with nut and
lockwasher on top of stop (9).
(7) Using figure 3-1 as a guide, locate and
unsolder leads from terminals A4E1, A4E2, A4-
(3) Tighten nut of resistor (7).
E10, A4E11, A4E12, A4E13, and A5J4.
(4) Install switches (6 and 8) in bracket
assembly (5) with tabs of washers (6A) in the
(8) Unscrew male and female retaining
holes of bracket assembly (5).
screws and remove connector A5J2 (fig. 321
