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TROUBLESHOOTING & REPAIR
MAIN TRANSFORMER AND CHOKE REMOVAL
AND REPLACEMENT PROCEDURE (continued)
FIGURE F.21 – OUTPUT CHOKE/MAIN TRANSFORMER ASSEMBLY DETAILS
| CHOKE THERMOSTAT |
TOP LEAD (#222A) | (LEADS #273 AND 41A) |
CENTER TAP | CHOKE / FRAME |
(LOW INDUCTANCE | MOUNTING |
OUTPUT LEAD) | BOLTS (4) |
ROPE SLING
BOTTOM CHOKE
LEAD (HIGH
INDUCTANCE
OUTPUT LEAD)
IRON/COIL
MOUNTING
BOLTS (4)
TRANSFORMER
SECONDARY
LEADS (6)
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PROCEDURE
1.Remove the input power to the
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
