Farm Equipment - WD45 Carb and Genny

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WD45 Carb and Genny

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=12265
Printed Date: 31 Jan 2025 at 3:12am
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Topic: WD45 Carb and Genny

Posted By: Dave(inMA)
Subject: WD45 Carb and Genny
Date Posted: 10 May 2010 at 4:48pm

I posted last Thursday about my WD45's overflowing carb. Pulled it off the tractor today and found no obvious cause. We did blow out the float valve seat and tweaked the float slightly to close the float valve more tightly. Once back on the tractor it performed flawlessly! Thanks again to everyone who contributed on the last thread.

After testing the genny, we pulled it off the tractor today to rehab. It needed a thorough cleaning and the wire to the field terminal was broken....now repaired. Now I am looking for brushes - one is in two pieces! Local parts store says Delco Remy now longer offers brushes for this genny. I believe that the model # is 1101413, but the tag is pretty worn.

I don't have a parts book (yet) for this tractor - can someone confirm the genny # above - or give me the correct one?

Can anyone suggest a source for replacement brushes? Thanks much!

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WC, CA, D14, WD45

Replies:

Posted By: Dave(inMA)
Date Posted: 11 May 2010 at 6:17am

Any input on the Genny part # or replacement brushes? Thanks!

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WC, CA, D14, WD45

Posted By: Chris/CT
Date Posted: 11 May 2010 at 6:42am

Dave, I have been getting those brushes easily at my local Acme Auto. "STANDARD" is manufacturer/importer? of alot of auto/farm elect. stuff. I can post the number later for you.

Posted By: Chris/CT
Date Posted: 11 May 2010 at 6:51am

DelRem Geny # 1101413 original 6V issue, NEW service # 1947578. 12Volt is listed as 1100327 original,#1100440 NEW service.

Posted By: Chris/CT
Date Posted: 11 May 2010 at 7:05am

Brushes for DR #1101413 are STANDARD RX-31 $8, HTH.

Posted By: Dave(inMA)
Date Posted: 11 May 2010 at 3:02pm

Chris, thank a ton for all your work on this. It's great to have those #'s - now written in my operator's manual.

Sometimes even the blind squirrel finds the acorn.... This afternoon I heard about a shop run by a couple of "old timers" who, it is said, can repair any genny ever made. I expect that's a slight exaggeration! But I took my parts to their shop and had 3 brand new brushes in a matter of minutes - $5 for the set. Put the genny together and reinstalled it.

Results - w/o field grounded I get about 3v at high idle, with field grounded I get 20+ v. Not sure this genny is too healthy - I connected it to the battery to do the motor test - it spins but pretty slowly. ALso, when I check voltage between A terminal and ground, I have the + lead on the voltmeter connected to the A terminal, negative to ground. This is a + ground system and we polarized the genny when we did the motor test: - lead to the A terminal, + lead to the case. Does this seem right? I'm thinking I should have the voltmeter leads reversed: - to A terminal amd + to ground. Man, I haven't confused myself this much in a long time!!

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WC, CA, D14, WD45

Posted By: M Diesel
Date Posted: 11 May 2010 at 6:54pm

Gotta say, generators have no concept of voltage, so a gen must be connected to a battery for (voltage) testing. (20 volts open circuit isn't far off.) They are not meant to run open circuit for a reason. That's why you must disconnect the field terminal if battery is not present as internal arcing will mess up things in a hurry. If the gen will make more than your battery voltage, just let the regulator do it's job and call it good. (Unless it exceeds about 10 amps)

FYI, for brushes, any larger size brush with a suitable connecting wire can be filed down if needed. Use a flat file laying on the bench and slide the brush. A little tedious, but doesn't take all that long really and can get you through a pinch. It may take a while to wear the curve to match is all. Useful with old starters too.

Posted By: Dave(inMA)
Date Posted: 11 May 2010 at 7:12pm

Good info. I was running it for a short time with both A and F connections to tractor removed.

I am starting to think that my reversed tester leads MAY have occurred because I had them plugged into the tester backwards!! Getting old is not for sissies.........

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WC, CA, D14, WD45

Posted By: M Diesel
Date Posted: 12 May 2010 at 5:15pm

I even got a cup that says that. Somewhere...