Lincoln Electric IM694 RED-D-ARC D503K 5+3 HO - Manual (Page 20)

E-2 TROUBLESHOOTING E-2
If all recommended possible areas of
misadjustment have been checked
and the problem persists,
Contact
your local Authorized Field
Service Facility.
D503K 5+3 HO
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
FUNCTION PROBLEMS
Machine fails to hold the “ heat ”
constantly.
Rough or dirty commutator.
Brushes may be worn down to limit
of life.
Brush springs may be broken.
Field circuit may have variable resis-
tance connections or intermittent
open circuit, due to loose connec-
tions or broken wire.
Electrode or work lead connections
may be poor.
Wrong grade of brushes may be
installed on generator.
Field rheostat may be making poor
contact and overheating.
“ Current Control ” may not be operat-
ing properly.
“ Current Control ” brushholder con-
tact springs may be worn out or
missing. Contact surface may be
dirty, rough and pitted.
“ Current Control ” brushholder sup-
port stud and mating contact sur-
faces may be dirty or pitted and
burned.
Engine running at varying speeds.
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
CAUTION