HELP wiring voltage regulaltor on 1961 MF 35

1hgfire · Mar 21, 2013

HELP NEEDED I’m wiring a voltage regulator on a 1961 MF 35 with 3 cylinder Perkins. The diagram on this site with control box not helpful. Like the original, the replacement regulator I’m installing has a “F” terminal, a “BAT” terminal, a “L” terminal, and a terminal on the bottom unlabeled, but same terminal on the one removed was stamped 4M, 12V, P/N. The “F” and bottom terminals (4M, 12V, P/N), were wired to the Dynamo. The “BAT” terminal I believe was headed toward the instrument cluster, and the “L” terminal was not connected at all. Having problem finding wiring diagram. Can anyone tell me how to wire this voltage regulator.
Desperate,
Phil

John T · Mar 21, 2013

On many 4 terminal Voltage Regulators with BAT FLD and LOAD side by side, the bottom or off by itself terminal is ARM/GEN.

BAT wires to Load (NOT battery/starter) side of ammeter, or if no ammeter it leads eventually to the hot ungrounded battery post often where the big battery cable attaches to the starter solenoid

FLD wires to the Gennys FLD post

ARM/GEN wires to the Gennys ARM post

LOAD (if used) feeds hot battery voltage to loads like lights or ignition etc often via the BAT input terminal on light etc switches.

If its only a 3 terminal VR (BAT GEN FLD) having no Load terminal, BAT to ammeter or same as above,,,,,FLD to Gennys FLD post same as above,,,GEN/ARM to Gennys ARM post,,,,,,Loads like lights etc are fed instead off the ammeters Load (NOT battery/Starter) terminal or same as above.

Its possible to substitute a 3 or 4 terminal VR with only minor wiring modifications that accomplish the above. On a 4 terminal VR if LOAD isn't used, loads can be fed instead off the ammeter or a hot battery source

Hope this helps, if you understand the workings you can wire it without a diagram

John T

HELP wiring voltage regulaltor on 1961 MF 35

1hgfire

New User

John T

Well-known Member

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