T M 5-3431-200-15
84. Welding Set Starts But Fails to
83. Wire Feed Speed Too Fast
Continue Welding.
Possible remedy
Probable caause
possible remedy
Probable cause
Wire feed motor
Replace motor (par. 88).
Wire feed motor
erratic.
failure.
Section V. CONTACTOR MAINTENANCE INSTRUCTIONS
85. General
assemble the contactor.
The contactor is mounted inside the control
c. Cleaning, Inspection, and Repair.
assembly next to the control panel on the left
side. It completes the welding circuit from the
(1) Clean all parts with a dry, lint-free
welder to the gun when the trigger switch is
cloth.
pressed. The contactor contains a blowout coil
which ruptures the arc to prevent high current
(2) Inspect for breaks, chips, broken in-
from damaging the contacts.
sulation, and worn threads. Repair or
replace damaged or defective parts.
86. Contactor
Warning: Disconnect the source of power
semble the contactor. Refer to paragraph 53
from the welder before performing any electri-
and test the contactor.
cal maintenance on the set.
move the contactor from the control assembly.
install the contactor on the control assembly.
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