TM
5-3431-200-15
SWING ARM ASSEMBLY AND
T'RIGGER SWITCH AND INCHING
FITTING ASSEMBLY.
SWITCH RELAYS.
Inspect the swing arm assembly for
Inspect the relays for loose or missing
loose mounting, missing hardware,
mounting hardware, loose or broken
damaged idler roll, broken spring,
electrical connections, and damage or
and other damage. Inspect the fitting
defects.
assembly for loose connections and
Tighten loose or replace missing
damage.
mounting hardware. Connect loose or
solder broken electrical connections.
Tighten loose or replace missing
Test the relays (pars. 57 and 58).
swing arm hardware. Replace de-
Replace a defective relay (pars. 57
fective swing arm parta (par. 61).
and 58).
Tighten a loose fitting assembly.
WELDING GUN
Solder as necessary (par. 61). Replace
COVER, SHIELD, AND CURRENT
a defective fitting assembly (par. 61).
CABLE.
NOZZLE, ADAPTER, AND GUIDE
Inspect the cover for loose or missing
TUBE.
mounting hardware, bent condition,
Inspect the nozzle and adapter for
and other defects. Inspect the shield
loose connection, burned tip, and other
for loose or damaged mounting screw,
damage. Inspect the guide tube for
cracks, or breaks, inspect the current
short length, bent condition, and
cable for cracks, breaks, and loose
other damage.
connections.
Tighten loose or replace missing cover
Tighten a loose adapter. Service the
mounting hardware. Replace or repair
nozzle (par. 33). Replace a damaged
a defective cover (par. 61). Tighten
nozzle (par. 62). Replace a defective
loose or replace a damaged shield
guide tube (par. 62). Service the
mounting screw (par. 61). Replace
guide tube (par. 33).
or repair a defective shield (par. 61).
GUN TUBE AND INSULATION.
Tighten loose current cable connec-
Inspect the gun tube for loose or
tions or replace a damaged cable
missing hardware, breaks, or other
damage. Inspect the insulation for
H A N D L E ASSEMBLY AND CON-
cracks, breaks, and other damage.
TROL CABLE.
I n s p e c t the handle assembly for
Tighten a loose gun tube. Replace
loose or missing hardware and dam-
missing hardware. Replace a defective
age. Inspect the control cable for
gun tube (par. 62). Replace defective
loose connection and damage.
insulation (par. 62).
Tighten loose or replace missing
ARGON GAS REGULATOR. Inspect
mounting hardware. Report a de-
the argon gas pressure tube cup for
fective handle assembly to field main-
insecure mounting, breaks, and other
tenance. Report a loose or damaged
damage. Inspect the pressure tube
control cable to field maintenance.
for improper seating, breaks, and
DRIVE ROLL AND GUIDE BUSH-
other damage. Inspect the regulator
INGS.
for other obvious defects and damage.
Inspect the drive roll for loose mount-
Mount the argon gas pressure tube
ing and dirty serrations. Inspect the
cup securely or replace a damaged
guide bushings for loose mounting
cup (par. 34). Seat the pressure tube
and excessive wear.
properly or replace a damaged tube
Tighten a loose drive roll. Service
the drive roll (par. 33). Report de-
fective drive roll or guide bushings
to field maintenance.
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