Lincoln Electric IM553 CLASSIC II - Manual (Page 17)

E-2 TROUBLESHOOTING E-2
CLASSIC II DEUTZ
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
Machine fails to hold the “heat” con-
stantly.
Welder starts but fails to generate
current.
a. Rough or dirty commutator.
b. Brushes may be worn down to
limit.
c. Field circuit may have variable
resistance connection or intermit-
tent open circuit due to loose con-
nection or broken wire.
d. Electrode lead or work lead con-
nection may be poor.
e. Wrong grade of brushes may
have been installed on generator.
f. Field rheostat may be making
poor contact and overheating.
a. Generator or exciter brushes may
be loose or missing.
b. Exciter may not be operating.
c. Field circuit of generator or
exciter may be open.
d. Exciter may have lost excitation.
Flash Fields(1)
e. Series field and armature circuit
may be open-circuited.
Contact your Local Lincoln Authorized
Field Service Facility for technical
troubleshooting assistance.
(1)FLASHING THE FIELDS:
1. Stop the engine welder and remove the cover from
the exciter.
2. Turn the “Fine Adjustment Control” (rheostat) to
“100” on the dial.
3. Using a 12 volt automotive battery, connect its
negative terminal to the negative brush holder. The
negative brush holder is the one nearest to the
rotor lamination. See the wiring diagram. With the
engine NOT running, touch the positive battery ter-
minal to the positive brush holder. Remove the bat-
tery from the circuit.
4. Replace the exciter cover. Start the welder and the
generator voltage should build up.