TM 55-4920-221-14
terminal of the de generator load switch (29, figure 8).
b. Cleaning, Inspection, and Repair.
(3) Remove two screws (30) and lockwashers
(1) Clean parts with a cloth dampened with
(31) securing switch to front of control panel, and
dry cleaning solvent, P-D-680 and dry thoroughly.
remove the switch from rear of the panel.
(2) Inspect switch for cracked or damaged
(4) Remove other dc generator load switches
case, weak or broken spring, and damaged terminals
in a similar manner.
and repair damaged terminal threads by chasing, if
practical.
b. Cleaning, Inspection, and Repair.
(3) Inspect threaded parts for worn or
(1) Clean parts with a cloth dampened with
damaged threads.
dry cleaning solvent P-D-680 and dry thoroughly.
c. Installation.
(2) Inspect switch for cracked or damaged
case, weak or broken, spring, binding or catching switch
(1) Position and secure high-low switch (18)
action, and damaged terminals, and repair damaged
in rear of control panel, to front of panel with special hex
terminal threads by chasing, if practical.
nut.
(3) Inspect hardware for unserviceable
(2) Connect leads to terminals of high-low
condition.
switch.
c. Installation.
(3) Install fan on-off switch (32) in a similar
manner.
(1) Position dc generator load switch (29) in
rear of the control panel, and secure to front of panel
with two screws (30) and lockwashers (31).
133. DC VOLTMETER SWITCH.
a. Removal.
(2) Connect leads to switch terminals.
(1) Remove total load disconnect switch
(3) Install total load disconnect switch panel
panel (paragraph 120a).
(2) Tag and disconnect lead from terminals of
135.
UNEXCITED BUS TEST, EQUALIZER COIL,
dc voltmeter switch (111, figure 8).
APP.,
RHEOSTAT,
AND
RHEOSTAT
(3) Remove switch from rear of control panel
REGULATOR SWITCHES.
by removing special nut securing switch to front of
a. Removal.
control panel.
b. Cleaning, Inspection, and Repair.
(1) Remove total load disconnect switch
panel (paragraph 120a).
(1) Glean parts with a cloth dampened with
(2) Tag and disconnect leads from terminals
dry cleaning solvent P-D-680 and dry thoroughly.
of unexcited bus test switch (33, figure 8).
(2) Inspect switch for cracked or damaged
(3) Remove special nut securing unexcited
case and terminals and repair damaged terminal threads
bus test switch to front of control panel, and remove
by chasing, if practical.
switch from rear of panel.
(3) Check switch with multimeter for
(4) Remove equalizer coil test switch (34),
app. switch (35), rheostat switch (36), and rheostat
(4) Inspect hardware for unserviceable
switch (37) in a similar manner.
condition.
b. Cleaning, Inspection, and Repair.
c. Installation.
(1) Clean and dry thoroughly parts with a
(1) Position dc voltmeter switch (111) in rear
cloth dampened with dry cleaning solvent P-D680.
of control panel and secure to front of panel with special
(2) Inspect unexcited bus test switch for
hex nut.
cracked or damaged case, weak or broken spring,
(2) Connect leads to switch terminals.
catching our binding contacts, damaged terminals and
(3) Install total load disconnect switch panel
repair damaged terminal threads by chasing, if practical.
(3) Inspect threaded parts for worn or
damaged threads.
134. DC GENERATOR LOAD SWITCHES.
c. Installation.
a. Removal.
(1) Position unexcited bus test switch (33) in
(1) Remove total load disconnect switch
the rear of control panel, and secure to front of panel
panel (paragraph 120a).
with special hex nut.
(2) Tag and disconnect leads from the
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