charging system

i have a 1940 m with a 6 volt system i have done all the trouble shooting that is in the book. any help with how to check out the gen?

Sure, see Para 5 of my Troubleshooting Procedure which shows how to by pass the Voltage Regulator or Light Switch charge control systems to full field the genny (by passing VR) and see if non charging is a VR versus a Genny problem.


TO DETERMINE IF ITS A GEN OR VR OR CUTOUT RELAY PROBLEM

5. a) VOLTAGE REGULATOR SYSTEM: With the tractor running, temporarily ground the Gens Field post to case. If she charges then but NOT otherwise, the VR may be bad, or a wires missing from VR"s Field post to the Field terminal on the VR, or the VR isn’t well grounded.

b) IF IT’S A CUTOUT RELAY SYSTEM and she charges only if you dead ground the Field but NOT otherwise, its either a bad switch or the switch isn’t well grounded or else the wires bad or open from the Gens Field post up to the switch. INSURE THAT GOOD SWITCH GROUND AND WIRING

6. If she still don’t charge, leave the Field grounded and jump a wire across from the VR or Cutout Relays BAT terminal over to its GEN terminal (jump by passes the cutout relay) and see if she charges. If then but not otherwise, a VR"s cutout relay isn’t working correct (maybe points burned/carboned) or a Cutout Relays NOT working or not wired correct.

7. With the 2 steps above, you have basically by passed the VR or Cutout relays functions, so if she still don’t charge, you"re left with a bad battery or wiring or the Gen itself.

HERES MY TROUBLESHOOTING PROCEDURE FOR NON CHAGRING

http://www.ytmag.com/cgi-bin/viewit.cgi?bd=jd&th=304795


John T
John Ts Troubleshooting