TM 1-1270-476-30
4-244
4-29. CONTROL PANEL ASSEMBLY 2A1 REPAIR (cont)
10. RESISTOR R6 OR R3 REPLACEMENT
NOTE
• This procedure is for replacing resistor R6
(1) and can also be used for replacing
resistor R3 (2).
• If resistor R3 is to be replaced, resistor R6
must be removed first.
REMOVAL
a. Loosen two setscrews (3) and slide
thumbwheel (4) away from resistor as far
as possible.
b. Remove thumbwheel (4) by loosening nut
(5) enough to pull resistor shaft clear of
thumbwheel.
c. Remove resistor R6 (1) by removing nut (5)
and lockwasher (6) and pulling resistor R6
(1) free of mounting bracket.
NOTE
If only resistor R3 is being replaced, do not
unsolder resistor R6.
d. Tag and unsolder wires of resistor(s) being
replaced.
INSTALLATION
e. Solder wires to resistor(s) and remove tags.
f. Have installation inspected.
NOTE
If resistor R3 is being replaced, resistor R3
must be alined prior to installing resistor R6.
g. Position resistor R6 (1) in mounting bracket
and attach lockwasher (6) and nut (5). Do
not tighten nut. Leave enough slack to
maneuver thumbwheel (4) into position on
shaft.
h. Install thumbwheel (4) on resistor shaft.
Ensure that resistor locating pin seats in
notch on mounting bracket. Tighten nut (5)
to secure resistor in position. Do not tighten
thumbwheel setscrews (3).
i. Perform resistor alinement (12 below).
j. If replacing resistor R3, repeat steps f thru h
for resistor R6.
END OF TASK
