Troubleshooting & repair – Lincoln Electric IDEALARC DC-655 User Manual

Page 97

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TROUBLESHOOTING & REPAIR

F-55

F-55

IDEALARC DC-655

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FIGURE F.21 – OUTPUT CHOKE/MAIN TRANSFORMER ASSEMBLY DETAILS

CHOKE THERMOSTAT
(LEADS #273 AND 41A)

CHOKE / FRAME
MOUNTING
BOLTS (4)

ROPE SLING

TOP LEAD (#222A)

CENTER TAP
(LOW INDUCTANCE
OUTPUT LEAD)

BOTTOM CHOKE
LEAD (HIGH
INDUCTANCE
OUTPUT LEAD)

IRON/COIL
MOUNTING
BOLTS (4)

TRANSFORMER
SECONDARY
LEADS (6)

MAIN TRANSFORMER AND CHOKE REMOVAL

AND REPLACEMENT PROCEDURE (continued)

PROCEDURE

1. Remove the input power to the DC-655

machine.

2.

Remove the case top and sides.

OUTPUT CHOKE REMOVAL

3.

Label and remove leads #273 and 41A from
the choke thermostat.

4.

Using the 9/16” wrench, remove the flexible
transformer secondary lead and the #222A
lead from the top lead of the output choke.
See Figure F.21.

5.

Using the 9/16” wrench, remove the low
inductance output lead from the center tap
of the choke. See Figure F.21.

6.

Using the 9/16” wrench, remove the high
inductance output lead from the bottom
choke lead. See Figure F.21.

7.

Support the choke with a crane or hoist.

8.

Using the 9/16” wrench, remove the four
bolts, washers and nuts mounting the choke
assembly to the transformer frame assem-
bly.

9.

Carefully lift the choke from the DC-655
machine.

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