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Allis53 
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Joined: 29 May 2022
Location: Michigan
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 Topic: WD replacement manifold
Posted: 03 Jun 2022 at 9:47pm |
Replacing the manifold tonight I came across an issue rebolting the carb to the new manifold. There is not the same clearance or depth to get the bolts through to bolt the carb back on. Why is the new manifold not the same depth on the intake ?? 
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Allis53
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Location: Michigan
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Posted: 03 Jun 2022 at 9:54pm |
My original 1953 manifold below. Also what is this sleeve for, a reducer the muffler fits into?  
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AaronSEIA
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Joined: 11 Sep 2009
Location: Mt Pleasant, IA
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Posted: 04 Jun 2022 at 5:23am |
There should be studs in the carb and you use a nut to hold it to the manifold. AaronSEIA
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Allis53
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Posted: 04 Jun 2022 at 6:58am |
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Okay. I can make studs for it. The original setup used cap screws down into the carb.
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Brian G. NY
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Posted: 04 Jun 2022 at 10:37am |
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I would guess your "original" setup wasn't really original. All of the WDs and WD-45s I've seen use studs and nuts. That is what is shown in all my parts books as well.
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Allis53
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Posted: 04 Jun 2022 at 4:32pm |
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Okay. Possibly correct, since i dont have a history on this tractor. It is my late grandfathers.
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IBWD MIke
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Joined: 08 Apr 2012
Location: Newton Ia.
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Posted: 05 Jun 2022 at 7:06am |
 Brian G. NY wrote:
I would guess your "original" setup wasn't really original. All of the WDs and WD-45s I've seen use studs and nuts. That is what is shown in all my parts books as well. |
Brian, I'm not sure if WD's had studs or not. The original manifolds had plenty of room to use bolts. Will have to look at 'Grandpa' today and see what it has. Obviously, they could have been changed at some point in the last 70 years!
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exSW
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Location: Pennsylvania
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Posted: 05 Jun 2022 at 7:08am |
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Mine has the original manifold and it uses bolts.
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Learning AC...slowly
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garden_guy
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Posted: 05 Jun 2022 at 8:56am |
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Both my WDs have studs that the nuts go on top of the flange on the manifold.
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sparky
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Posted: 05 Jun 2022 at 1:15pm |
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I have a question concerning this topic. Are Vinson manifolds still available?
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It's the color tractor my grandpa had!
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AaronSEIA
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Posted: 06 Jun 2022 at 5:49am |
IBWD MIke wrote:
Brian, I'm not sure if WD's had studs or not. The original manifolds had plenty of room to use bolts. Will have to look at 'Grandpa' today and see what it has. Obviously, they could have been changed at some point in the last 70 years!
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Stud part number 70230917 was used from the WC clear through the 175. AaronSEIA
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jvin248
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Posted: 06 Jun 2022 at 7:09am |
.
If buying a new manifold, they are the updated WD-45 style that has much improved air flow for more horse power out of the WD45 tractor (upgraded HP for WD? for the same flow improvement reason?). To get that manifold feature the space was narrowed above the carb. I bought new studs and nuts at the local hardware store.
Here's an old dealer movie that talks about the WD45 updates, I believe briefly mentions the manifold.
My '52 WD needed new bushings between the manifold and engine block, plus a better fitting new muffler so I ordered and installed the updated new manifold and a new muffler. I figured that since I was going to have to frog around with rusty manifold bolts I'd put a few new parts on it. The tractor is running a lot better now (mostly due to better manifold to engine seal, no air leaks), perhaps it has more horsepower... here's a before/after swap (radiator fan warbles the audio).
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Edited by jvin248 - 06 Jun 2022 at 7:13am
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IBWD MIke
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Joined: 08 Apr 2012
Location: Newton Ia.
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Posted: 06 Jun 2022 at 7:10am |
Got busy doing other things yesterday and forgot to look. Maybe today?
I would assume if there is a part no. going back to the WC era that studs would be correct.
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Alex09(WI)
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Joined: 15 Mar 2012
Location: CECIL WI
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Posted: 06 Jun 2022 at 9:47am |
230917 (2) STUD, carb to manifold (used prior to engine #263951, except 262081 through 262103)
903771 (2) CAPSCREW, carb to manifold (used eng #262081 thru 262103 & 263951 & up)"
Quoted from WD MANIFOLD PAGE of parts book
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www.awtractor.com
A&W TRACTOR 920-598-1287
KEEPING ALLIS-CHALMERS IN THE FIELDS THROUGH THE 21ST CENTURY
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JimD
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Posted: 06 Jun 2022 at 6:20pm |
Vinsons are long gone. I bought the last of their stock years ago and I'm out.
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Owner of OKtractor.com PM for an instant response on parts. Open M-F 9-6 Central. We have new and used parts. 877-378-6543
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IBWD MIke
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Posted: 09 Jun 2022 at 8:33am |
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Finally remembered to have a look at the old WD. It has capscrews, as to weather or not they are original, who knows?
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