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Home›Repair guides›Restoring Residual Magnetism - Field Flashing

Katolite 280 -- 430 Frame — Restoring Residual Magnetism - Field Flashing

For the Katolite 280 -- 430 Frame.

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Before you start

  • CAUTION: Failure to remove the exciter field leads from the automatic voltage regulator during flashing procedures may destroy the regulator
  • Batteries may explode when exposed to an electric arc

Procedure

  1. Shutdown the generator set
  2. Remove the exciter field leads F+ and F- from the regulator
  3. Connect the F+ and F- leads to the battery's corresponding positive and negative terminals using an appropriate length of lead wire to separate the battery from the point of connection
  4. After 3 to 5 seconds, remove the F- lead - an inductive arc should result
  5. If no arc is drawn, repeat the procedure
  6. Reconnect the F+ and F- leads to the regulator
  7. Restart the generator and verify that terminal voltage is developed
  8. If terminal voltage does not develop, repeat the field flashing procedure or consult the troubleshooting section

Tools required

  • 12 volt battery
  • lead wire

Specs & torque values

  • 3 to 5 seconds connection time

Source: manual:MARATHON Magnaplus Generator 280_430 Installation Manual 2004.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.