Troubleshooting & repair, Main transformer removal & replacement (continued) – Lincoln Electric IDEALARC R3R-500 User Manual

Page 92

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3. Install the bottom primary coils, one on each of the

three legs of the bottom iron assembly. The coils
must be in correct position (left, center, right).
Place the coils so that the leads come out at the
back of the machine. See Figure F.36 for proper
positioning.

4. Place insulation (Lincoln Electric part number

S20728) on top of each of the three primary coils.
The longer side of the insulation should be placed
toward the front of the machine. See Figure F.37
for the location of this insulation

5. Place the three secondary coils on top of the insu-

lation installed in Step 4. The leads should come
out at the front of the machine with the short leads
on top. See F.36 for proper positioning.

6. Insert shims (Lincoln Electric part number

CI001250 or CI000317) between the secondary
coil sides and the iron assembly on either side of
the legs. See Figure F.37.

7. Place insulation (Lincoln Electric part number

S20728) on top of each of the three secondary
coils. The longer side of the insulation should be
placed toward the front of the machine, where the
secondary start and finish leads come out. See
Figure F.37.

8. Install the three top primary coils, noting which is

right, left, and center. Leads should come out at
the back of the machine. See Figure F.29 for prop-
er positioning. The coils must be in correct position
(left, center, right).

9. Install the top iron (lamination) and choke assem-

bly. With the 9/16” deep well socket wrench,
reassemble the four thru-bolts that clamp the top
“E” iron to the bottom “E” iron. Lightly tap on the
top of the iron with a hammer before tightening.
Tighten the nuts and thru bolts to 19-25 lb-ft.

TROUBLESHOOTING & REPAIR

F-58

IDEALARC R3R