Cub Engine Block Fitting

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Dthompso
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Cub Engine Block Fitting

Postby Dthompso » Wed Sep 15, 2021 10:17 pm

What is this fitting for on Cub Loboy ?
0EEED645-C96A-4092-BF9F-EEF1C77107CA.jpeg
International Cub block fitting

Jim Becker
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Re: Cub Engine Block Fitting

Postby Jim Becker » Wed Sep 15, 2021 10:55 pm

We have seen replacement blocks drilled for that fitting. I am not aware of anyone having one on an original tractor block. It must be for some weird non-tractor engine. What is your engine number (stamped) and engine block part number (cast in)? Both will be on the other side of the block (near the carburetor).

Engine number location:
http://www.tmtractor.com/id/id_003.htm

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Re: Cub Engine Block Fitting

Postby wrz » Wed Sep 15, 2021 11:08 pm

My 59 lo boy has the same hole with a standard pipe plug. What it is for I do not know. The one thing it could be used for is a temperature sensor or a block heater.
Wm

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Re: Cub Engine Block Fitting

Postby wrz » Wed Sep 15, 2021 11:23 pm

The engine serial number on my 59 is in line with others on Raymond's data base. The block has the added cast iron where the hole is threaded. The casting date of engine matches the rest of the tractor's parts. So it is not a replacement engine.
Wm

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Re: Cub Engine Block Fitting

Postby Jim Becker » Wed Sep 15, 2021 11:36 pm

Interesting. Does it have the usual part number or is it something weird?

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Re: Cub Engine Block Fitting

Postby wrz » Wed Sep 15, 2021 11:44 pm

My 59 lo boy serial number is 11434 and is entered in Raymond's data base which shows the engine serial number, part number and casting dates.
Wm

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Re: Cub Engine Block Fitting

Postby john2189 » Thu Sep 16, 2021 6:32 am

What comes out of it? Oil or water? Could it be a block heater?
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Re: Cub Engine Block Fitting

Postby tnestell » Thu Sep 16, 2021 6:37 am

Goes into the water jacket. I use it for a temperature gauge. Works well. My engine is from a power unit. Guess it could be used for a block heater.

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Re: Cub Engine Block Fitting

Postby Gary Dotson » Thu Sep 16, 2021 6:52 am

A block heater would be more effective mounted lower in the water jacket. It looks like the remains of a temp gauge in his pic. There has to be some clue in the casting #.

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Re: Cub Engine Block Fitting

Postby Dthompso » Thu Sep 16, 2021 8:59 am

As you can see it looks like it has been leaking coolant. So far I haven’t been able to remove it. Cub is at farm shop. Serial # and casting # to come.

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Re: Cub Engine Block Fitting

Postby tst » Thu Sep 16, 2021 9:10 am

I have had a few pass through my hands with it,

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Re: Cub Engine Block Fitting

Postby Glen » Fri Sep 17, 2021 5:45 pm

Hi,
The sender for temperature gauges on the tractors I have seen were all up high on the head, up where the engine gets the hottest.

The water circulates down through the radiator on a Cub. The water is the coldest at the bottom of the radiator, and in the lower part of the engine.

A water temperature sender should be up high on the head, near the upper water elbow, for a temp gauge. My opinion.

Try using a 6 sided socket to remove the part in your pic, a 12 sided socket might slip, and round the corners of the part. :)

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Re: Cub Engine Block Fitting

Postby Jim Becker » Fri Sep 17, 2021 9:10 pm

wrz wrote:My 59 lo boy serial number is 11434 and is entered in Raymond's data base which shows the engine serial number, part number and casting dates.
Wm

That is strange. Your part number is the same as the usual engine block. The ones with this feature not only have the hole, but there is extra material that would have required a different casting.

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Re: Cub Engine Block Fitting

Postby Dthompso » Wed Sep 22, 2021 10:18 am

Got fitting out finally. It was a temp probe. This is off an International Cub loboy, s/n 1378 J. Block casting no 5 4 V, stamped block # is 35574R4(for some reason the 4s are inverted)
Attachments
55E868D4-9586-4ED3-A9D8-8EA235A18217.jpeg

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Re: Cub Engine Block Fitting

Postby Matt Kirsch » Wed Sep 22, 2021 10:24 am

I had a '51 Cub that had a water temperature sensor brazed in that location. The gauges were trashed, but the fitting wasn't leaking so I snipped the capillary tube off near the fitting and pretended it wasn't there. Wasn't going to pull the pin on that grenade...


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