TM 5-3431-207-15
Section V. REMOVAL AND INSTALLATION OF COMPONENTS
components. The following sections will provide detail
67. General
instructions for the removal, disassembly, cleaning,
The Model LA-300 Welding Machine is so constructed
repair, and reinstallation of all of the welding machine
that the removal of a major component is impractical
components.
without the complete disassembly of some of the
Section VI. CONTROL PANEL
(11) Remove shaft (24).
68. Control Panel Assembly
(12) Remove spring (25) by removing spring
clip (26).
a. Disassembly.
(13) Remove polarity switch (27) by removing
(1) Remove handles (1) and (2) by removing
handle (28).
setscrews (3) and (4).
(14) Remove resistance tube (29) by removing
(2) Remove dial plates (5) and (6) by
stove bolt (30), mounting washers (31),
removing screws (7) and (8).
lockwashers (32). And nut (33).
(3) Remove cover assembly (9) by removing
(15) Remove studs (34') by removing nuts (35)
screws (10).
and (36), connection strap (37), nuts (38),
washers (39), connection strap (40)
(4) Remove volt-amp meter
(11)
in
bushings (41), washers (42) and (43)
accordance with paragraph 42.
and lockwashers (44).
(5) Remove rheostat (13) in accordance with
(16) Remove connection straps (45) and (46)
by removing screws (47) and (48).
(6) Remove remote control switch (14) in
(17) Remove stud (49) by removing nut (50),
accordance with paragraph 43.
lockwashers (51), washers (52), (53) and
(54) and bushing (55).
(7) Remove contact fingers (16) by removing
screws (17) and lockwashers (18).
(18) Remove bracket (56) by removing screws
(57).
(8) Remove brushholder (19) by removing
screws (20) and springs (21). Pull straight
(19) Remove subpanel
(58) by removing
out to remove from shaft.
screws (59).
(9) Remove insulation tube (22).
(10) Remove flat washer (23).
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