Section VII. WIRE LEADS
ponents to which it is connected. Touch the test
6-29. General
probes of multimeter to each end of the wire. If
The welding machine wire leads connect compo-
continuity is not indicated, the wire is defective
nents of the welding machine through quick dis-
and must be repaired or replaced (c and d below).
connect or screw type terminal connections.
c. Repair. Shave the insulation on the wire to
expose one-half inch of bare wire at both ends of
6-30. Wire Leads
the break. Twist the bare wire together and solder
a. Cleaning and Inspection.
the connection. Cover the repaired break with
electrical tape. Do not leave any bare wire ex-
(1) Clean the wire leads with a clean, dry
posed. If a terminal lug is damaged, or breaks off
cloth.
a wire, replace it, using an exact duplicate termi-
(2) Inspect for cracked, cut, or dried-out in-
nal lug.
sulation. Inspect for bare, cut, corroded, or broken
d. Replacement. Replace a wire by disconnecting
wire leads and for corroded or broken wire leads
it from the component or components to which it
and for corroded or damaged terminal lugs.
is attached and remove the wire. Install a new
wire and connect it to the component or compo-
nents.
each end of the wire from the component or com-
Section Vlll. WELDING MACHINE FRAME
b. Cleaning and Inspection.
6-31. General
(1) Clean all parts with an approved cleaning
The welding machine frame consists of a base,
solvent and dry throughly.
four uprights; two side rails, and two mounting
(2) Inspect for breaks, cracks, elongated
angles. Remove the control panel, cover, side
mounting holds, damaged stud threads, or other
shrouds, and rear shrouds which enclose the
damage.
frame. Remove air baffles and internally mounted
(3) Replace a defective part as necessary.
components which are assembled to the frame.
6-32. Welding Machine Frame
components which are assembled to the frame. Re-
a. Disassembly. Disassemble as indicated in
place the control panel, cover, side shrouds, and
rear shrouds which enclose the frame.
7. Washer, lock, 5/16 in. (16 rqr)
1 Screw, cap, hexagon head, 1/4-20 x 1/2 in. (4 rqr)
8 Screw, cap, hexagon head, 5/16-18 x 3/4 in. (16 rqr)
2 Baffle, rectifier
9 Screw, machine, 1/4-20 x 5/8 in. (8 rqr)
3 Side rail
10 Nut, self-locking, hexagon, 1/4-20 (8 rqr)
4 Upright
11 Nut, plain, hexagon, 1/4-20 (4 rqr)
5 Base
12 Washer, lock, 1/4 in. (4 rqr)
6 Nut, plain, hexagon, 5/16-18 in. (16 rqr)
Figure 6-26. Machine frame, disassembly and reassembly.
6-32
