TM 11-5820-890-30-4
3-28. REPLACEMENT OF SWITCHES.
Tools:
Flat tip screwdriver
Soldering kit
Adjustable wrench
Hex key set
Expendable supplies:
Alcohol
Cotton swabs
Solder
Masking tape
References:
Paragraph 3-26 for removal and installation of test adapter from maintenance group lid.
Figure 3-12 for location of switches.
a. Replacement of Toggle Switches (S7 and S9 through S15).
ITEM
ACTION
REMARKS
REMOVAL
a. Terminal lugs (9)
b. Switch (8, 10, 11, or 13)
INSTALLATION
c.
d.
e.
f.
Alignment washer
Switch (8, 10, 11, or 13)
Hex nut and Iockwasher
Terminal lugs (9)
Use flat tip screwdriver. Remove and
Use masking tape on ter-
retain screws and Iockwashers securing
minal lug wires during re-
terminal lugs (9) to switch. Note positions
moval to keep track of po-
of all terminal lugs removed from switch.
sitions on switch.
See figure 3-12 (sheet 1).
Note position of switch. Use adjustable
wrench. Remove and retain hex nut and
Iockwasher securing switch to test adapter.
Remove and discard switch.
Make sure there is an alignment washer
on replacement switch. Check that tab
of washer is pointing toward the switch.
Insert switch into test adapter so that
tab of washer fits into hole in back of
test adapter front panel.
Use adjustable wrench. Install and tighten
These were removed in
retained Iockwasher and hex nut on switch
step b.
securing it to front panel.
Use flat tip screwdriver. Install retained
These were removed in
screws with Iockwashers through termi-
step a.
nal lugs (9) and into switch connections.
Tighten. Make sure each terminal lug
is secured to correct position.
3-97
