Leroy-Somer — Accessing, checking and replacing the diode bridge

Repair & overhaul

From a Leroy-Somer service manual — check it applies to your exact model before use.

Procedure

1. Remove the air ducts (3).
2. Cut the fixing clamps of the exciter cables, disconnect E+ and E- from the exciter.
3. Disconnect T1 to T6 from the terminal block (124).
4. Remove the nuts on the tie rods (37).
5. Remove the NDE bracket (36) using a puller, e.g. U.32 - 350 (Facom).
6. Unsolder the connections.
7. Check the bridge using an ohmmeter or a battery lamp.
8. Replace the bridges, respecting the polarity.
9. Resolder the connections.
10. Fit a new O ring seal in the bracket.
11. Refit the NDE bracket.
12. Connect T1 to T6 from the terminal block (124).
13. Replace the fixing clamps on the cables and the air ducts (3).

Source: Leroy-Somer service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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