TM 55-1680-320-23 & P
3-24. MICROSWITCH ASSEMBLY (FULL UP) - REPLACE (cont)
3-24
2. Installation.
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
Place electrical braid over both leads of ac-
tuator assembly. Route shielded leads through
access hole in boom head housing (39).
Install wiring harness assembly (8) to main
housing assembly (28) using bolt (40), washer
(41) and nut (42).
Slide approximately 10 inches (25.4 cm)of
beat shink tubing over cable cutter and ac-
tuator wires until it butts against housing.
Shrink tubing in place.
Slide connector shell and insulator, ap-
proximately 5 inches (12.7 cm) of heat shrink
tubing, and 3 inches (7.62 cm) of electrical
braid onto wire harness (8).
Install pins into connector (37) in accordance
with wiring diagram.
Assemble connector (37). Slide electrical
braid flush with connector and twist braid until
secured. Slide heat shrink tubing over braid
and shrink in place.
Install clamp (36) onto connector (37) and
secure using screws (38).
Secure wire harness (8) to boom head housing
(39) using clamp (32), bolt (33), washer (34)
and nut (35).
Lubricate packing (30). Install machine key
(31) and packing on sheave shaft (17).
Slide sheave assembly (29) through top of
main housing assembly (28) and install sheave
shaft (17) in main housing assembly so that
machine key (31 ) aligns with corresponding
hole in sheave assembly and sheave shaft locks
in place. Remove or install shims adjacent
to bearing (27) to achieve 0.003-0.010 in.
(0.008-0.025 cm) end play of sheave. Ensure
sheave is centered within 0.010 in. (0.025
cm) of main housing assembly centerline.
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