'47 farmall A Manifold and Pedal Springs

[Petermac7644]

Hi,

I recently replaced the manifold on my A.

I installed the manifold, and the tractor wouldn't start. It ran with the old manifold despite the giant crack in the casting. I suppose all the corrosion, rust and crud in there kept it sealed enough for the tractor to run.

The new unit came with holes in the casting. The original had holes on the intake side but with some kind of pin in there. This new one came with the pin holes and also some threaded holes on the exhaust side.

I put a little duct tape over the holes in the new manifold and sure enough it fired up and ran like a champ - much stronger than with the old part... so now I wonder what do I use to plug those holes other than duct tape? Can anyone tell me what size/thread type for the exhaust side and what sort of pins I need for the intake side??

In other news... one of the brake pedal return springs broke on me. I can't seem to find a proper OEM replacement. Has anyone had luck with a generic spring? what did you use?

Thanks,

Peter

[Jim Becker]

The manifolds I am familiar with have 1 threaded hole in the intake side and a pair or (very small) holes that are often plugged with pins in the exhaust side. You have pictures of yours?

Make sure you have the governor to carburetor link properly adjusted with the new manifold.

Steiners and All States Ag Parts both have a replacement return spring. There may be other sources.
https://www.steinertractor.com/IHS701-B ... urn-Spring
https://www.tractorpartsasap.com/brake- ... 25754.html

[Eugene]

Pipe plug in the threaded hole. Other two holes leave open.

The threaded hole in the intake is for (vacuum) operating a cow milking machine.

[lolbell]

Pipe plug in the threaded hole. Other two holes leave open.

The threaded hole in the intake is for (vacuum) operating a cow milking machine.

I just took the manifold off of a 1976 140 to have it resurfaced and installed new gaskets. There were two holes in the middle tube. I tapped them and plugged with stainless steel bolts. Did I do wrong? Do I need to take them out ?

[Petermac7644]

Thanks the pipe plugs are going to work. This manifold has three of the threaded holes. The old manifold just had one and I didn’t realize that’s where the vacuum for a milker is. Interesting. I guess those pinholes are for water to run out the exhaust side.

Those springs are too pricey to ship to Canada unfortunately

[Petermac7644]

[SamsFarm]

I do the cardboard drip catcher too!

[Petermac7644]

Haha because of the drips the ol’ tractor is kept in fresh fluid

[Dh2jr]

For the brake springs I went to ace hardware and found 1 about 3 inches to long cut it and bent a new end on it. Thinking is cost me about $3. And 5 minutes