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Anyone have a working MH 22

K

Ken Hoover

New User
I have a 49 MH22 with a generator issue. It did not have any electrical loads. Lights were an upgrade then.
It has a Autolite 4804B generator and cannot find a replacement or refresh kit. If you have one with a good generator, how is the field connected? To case? or? Armature goes to gen side of charge relay. It has two wires coming out of the generator which i know one to be field and one to be armature. I have a JenSales book for it, but the only electrical diagram is for a tractor with lights. Sounds like it should be easy to adapt, but not so much. Any help from the community is so greatly appreciated.
Ken
 
Been awhile ,so, thats the same generator used on the mh 26 combine ,I recall correctly . Chrysler industrial 6 , for sure its auto lite on Chrysler of that era, hope this can broaden the search area .
 
Try the Brillman Co for parts. Is there any knob on the dash? F terminal usually is connected to a terminal on the light switch for hi-lo charge rates. I'm guessing it's 6v with a cutout relay.
 
I contacted Brillman about a question I had . Forget what now.They never got back to me about it. I guess I would probably not bother them again for my money since they didn't even reply back by email.
 
It does NOT have the 3 position switch on the dash shown in the electrical diagram, just a common push pull switch. I do not know if it ever had the 3 position and someone replaced it, or it never had one since this tractor never had lights.
Your guess is correct. 6v system with cut out relay

thanks for responding
 
I'm familiar with a Massey Harris 33. It has a 3 position push/pull light switch. What kind of 3 position switch does the electrical diagram show? On this 33, It is very hard to tell when the 'middle' position of the push/pull is reached. Best way to know is to watch the lights as they go to either dim or bright. Maybe you switch is like that?
 
(quoted from post at 08:42:23 08/08/21) It does NOT have the 3 position switch on the dash shown in the electrical diagram, just a common push pull switch. I do not know if it ever had the 3 position and someone replaced it, or it never had one since this tractor never had lights.
Your guess is correct. 6v system with cut out relay

thanks for responding
Click to expand...
I have a 48 Earthmaster that has a small Autolite generator can't find the PN right now but its wired with a 3 position switch and you'll need one to make your gen work if all it has is a cutout, YT has the switch listed here on the site search for Allis 3 position switch


This post was edited by MNGB on 08/09/2021 at 09:06 am.
 
I looked at my Earthmaster generator its an Auto-Lite GAS4169 using a cut out I used the Allis 3 position switch as posted previously

mvphoto79920.jpg

[/img:2defe57b91]
 
Thanks so much. I ordered a new 3 position switch and some new wire and will
run it like you provided. Look a lot like my service manual route, just
can't understand why i need the switch so much since I have no electrical
loads except for the cranking amps it used. No lights installed. It was
optional equipment back then

Ken
 
The switch is needed because there is no voltage regulator the system just has a cutout relay, the cutoff is open when the engine isn't running to prevent the back feed from the battery trying to motorize the generator. Witch the engine running the generator producing enough voltage to close the cutout so now the generator can charge the battery but there is no regulator and no way to ground the field the switch has a resistor that acts like a regulator and only allows the generator to produce about 5 amps pulling the switch all the way out by-pass's the resistor and the field is fully grounded causing the generator to produce about 15 amps. This is way to much for running all day will boil the battery and over work the generator. It makes no difference if lights are installed or not used
Good luck hope this helps
GB in MN
 
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