TM 55-4920-221-14
23.
Bus bar
50.
Nuts
24.
Screw
51.
Knob
25.
Nut
52.
Voltmeter phase selector
26.
Bus bar
53.
Dc voltmeter circuit selector
27.
Bus bar
54.
Phase sequence indicator
28.
Bus bar
55.
Screws
29.
Bus bar
56.
Nut
30.
Lug clearance washer
57.
Voltage regulator mounting pad
31.
Lug clearance washer
58.
Screw
32.
Binding post
59.
Nut
33.
Binding post
60.
Nameplate
34.
Insulating washer
61.
Nameplate
35.
Insulating washer
62.
Nameplate
36.
Resistor
63.
Nameplate
37.
Resistor
64.
Nameplate
38.
Stove rod
65.
Nameplate
39.
Nut
66.
Nameplate
40.
Resistor
67.
Nameplate
41.
Screw
68.
Nameplate
42.
Nut
69.
Push-on nut
43.
Single-phase current transformer
70.
Bracket
and shunt assembly.
71.
Handle
44.
Single-phase ammeter and wattmeter
72.
range selector.
73.
Nut
45.
Screw
74.
Bracket
46.
Spacers
75.
Screw
47.
Nut
76.
Screw
48.
Nameplate
77.
Lockwasher
49.
Screws
78.
Figure 12-Continued.
(2) Visually inspect transformer for brittle,
(2) Insert screws (45) through transformer
cracked, or deteriorated insulation and damaged leads
plate mounting holes and secure with two nuts (47).
or windings.
(3) Connect leads to current transformer and
shunt assembly.
(3) Inspect shunts for cracks, breaks, and
damaged thread surfaces.
(4) Install T1 variable control (paragraph
117c(9)).
(4) Repair damaged threads by chasing when
practical.
(5) Inspect brackets, plate, and hardware for
unserviceable condition.
RANGE SELECTOR.
a. Removal.
d. Reassembly.
(1) Remove T1 variable control (paragraph
(1) Attach two brackets (11) on plate (14) with
117a(6)).
screw (12) and nut (13).
(2) Remove current transformer and shunt
(2) Attach shunt (7) on brackets (11) with two
assembly (paragraph 122a).
screws (9) and nuts (10).
(3) Loosen setscrew and remove handle (71,
(3) Install shunt (8) in a similar manner.
(4) Place transformer (1) in channel (4) and
range selector (44), and remove range selector from
position channel on plate (14).
rear of control panel.
(5) Insert clamping strip (3) through
(4) Remove four spacers (46) protruding
transformer. Align mounting holes with two screws (2),
inside control panel, from screws (45), and remove
lockwashers (5), and nuts (6).
screws from front of control panel.
e. Installation.
(5) Remove nameplate (48) from front of
(1) Position single-phase current transformer
panel by removing two nuts (50) and screws (49).
and shunt assembly (43, figure 12) on rear of single-
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