TM 5-6115-465-12
TO 35C2-3-446-1
NAVFAC P-8-625-12
TM 06858B/06859D-12
(2) Cleaning and Inspection.
Voltage Adjust Rheostat.
p.
(a) Clean switch and switch guard with
(1) Removal.
filtered compressed air and a soft bristle brush or
wipe with a clean, lint-free cloth lightly moistened
(a) Tag and disconnect electrical leads
with an approved cleaning solvent.
to voltage adjust rheostat.
(b) Visually inspect switch for cracked
(b) Loosen setscrew in control knob (67,
casing, corrosion, stripped or otherwise damaged
threads, and evidence of shorting or damage.
rheostat shaft.
(c) Check switch guard for cracks,
(c) Remove nut (68) to remove rheostat
breaks, and other damage.
(69).
( 3 ) Testing.
(2) Cleaning and Inspection.
(a) Place switch in ON position (lever
(a) Clean voltage adjust rheostat with
away from switch mounting bushing key way).
filtered compressed air and a soft bristle brush or
wipe with a clean, lint-free cloth lightly moistened
(b) Using an ohmmeter, check for contin-
with an approved solvent.
uity between each center terminal and the corres-
ponding upper terminal.
(b) Visually inspect rheostat for cracked
casing, corrosion, stripped or otherwise damaged
(c) Place switch in OFF position.
threads, and evidence of shorting or other damage.
(d) Check for continuity between each
(3) Testing.
center terminal and corresponding lower terminal.
(a) Connect an ohmmeter across two
(e) Replace switch if any discontinuity is
outer terminals of rheostat. Indication shall be 250
noted.
ohms resistance.
(4) Installation. Install battle short switch
(b) Rotate rheostat shaft counterclockwise
in reverse order of removal procedures.
as far as it will go.
r. Operations Switch.
(c) Connect ohmmeter between center
terminal and either outer terminal.
(1) Removal.
(d) Slowly, at an even rate, rotate rheo-
(a) Tag and disconnect electrical leads
stat shaft clockwise as far as it will go while ob-
to operations switch.
serving the ohmmeter.
(b) Remove nut (76, figure 3-37, sheet 2
(e) Ohmmeter indication shall increase,
of 3) and tooth lockwasher (77), to remove opera-
at an even rate, from 0 to 250 ohms resistance.
tions switch (78) and key washer (79). Do not remove
nut (80), unless inspection reveals damage and re-
(f) If ohmmeter indication changes irrat-
placement is necessary.
ically, or is not 250 ohms when rotation is complete,
the rheostat is defective and shall be replaced.
(2) Cleaning and Inspection.
(4) Installation. Install voltage adjust rheostat
(a) Clean switch with filtered compressed
in reverse order of removal procedures.
air and a soft bristle brush or wipe with a clean, lint-
free cloth lightly moistened with an approved cleaning
Battle Short Switch.
q.
solvent.
(1) Removal.
(b) Visually inspect switch for cracked
casing, corrosion, stripped, or otherwise damaged
(a) Tag and disconnect electrical leads to
threads, and evidence of shorting or other damage.
battle short switch.
( 3 ) Testing.
(b) Remove nut (70, figure 3-37, sheet 2
of 3) and tooth lockwasher (71) to remove switch
(a) Place switch in PARALLEL OPERA-
guard (72), battle short switch (73) and key washer
TION position (lever away from mounting post key
(74).
way).
(b) Using an ohmmeter, check for contin-
uity between each center termiml and corresponding
(c) Do not remove nut (75) unless inspect-
upper terminal.
ion reveals damage and replacement is necessary.
3-77
