H Radiator Cap Gasket

Farmall H, HV & Super H, 300 & 350, 1939-1958
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Zeek
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Tractors Owned: 1940 Farmall H
Location: Bushnell, FL

H Radiator Cap Gasket

Postby Zeek » Thu Nov 24, 2022 12:11 pm

I found that the radiator cap for my '40 H is missing half the gasket. What's strange is the missing piece is gone (and not inside the radiator), so I'm guessing the prior owner got rid of the piece. From what I read, this model is the pressurized system, so I want to replace the gasket.

I have not found a direct replacement without buying a whole $20 cap that I don't really need. I have not had an overheating problem, in fact, I need to check the sensor because the temp gauge never moves.

Anyway, does anyone know where you can get just the gasket? Thanks in advance!
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Don McCombs
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Re: H Radiator Cap Gasket

Postby Don McCombs » Thu Nov 24, 2022 12:47 pm

I think your best bet is going to be to replace the cap.
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Zeek
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Tractors Owned: 1940 Farmall H
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Re: H Radiator Cap Gasket

Postby Zeek » Thu Nov 24, 2022 10:23 pm

Ok, thanks. I was afraid of that. The owner's manual talks about replacing the gasket, but that was 82 years ago.
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Re: H Radiator Cap Gasket

Postby Gary Dotson » Fri Nov 25, 2022 8:19 am

I wonder if perhaps you could get a small piece of rubber gasket material and cut one out. You might have to stretch it a bit to get it past the check valve.

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Zeek
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Tractors Owned: 1940 Farmall H
Location: Bushnell, FL

Re: H Radiator Cap Gasket

Postby Zeek » Fri Nov 25, 2022 9:16 am

I thought about that and it may work, but I don't have anything like that around and I see the gasket itself isn't flat. If you click on the picture to make it bigger you can see it's kind of shaped with ridges. I'm assuming that may be necessary since the factory did it that way and I see the replacement caps look that way as well.
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Re: H Radiator Cap Gasket

Postby Dale Finch » Fri Nov 25, 2022 9:19 am

What about trying a piece cut from an inner tube? :?
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Gary Dotson
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Re: H Radiator Cap Gasket

Postby Gary Dotson » Sat Nov 26, 2022 8:32 am

Those ridges have been formed over time, I think it started out flat.

Gary Dotson
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Posts: 5101
Joined: Thu Aug 03, 2006 6:20 am
Zip Code: 43358
Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D
Circle of Safety: Y
Location: OH West Mansfield

Re: H Radiator Cap Gasket

Postby Gary Dotson » Sat Nov 26, 2022 8:36 am

I guess I need to correct myself, when I looked up a pic of the cap, it indeed has ridges.


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