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Harry Ferguson Tractors Discussion Forum
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Fost Plugs?

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Clare Sutton

06-07-2007 13:15:57




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I have a 1953 TE20-85 Ferguson. Just lately the transmission/hydraulic case has been throwing what I think are frost plugs. One right at the bottom of the case and the other on the side. I haven't seen the plugs but my tractor starts throwing fluid out and when I check where it is comming from I find about a 1/8" diameter hole (perfectly round). They definitely are drilled. They seem too small for frost plugs and I thought frost plugs were normally on the block. Anyone know anything about these or how I'm supposed to plug them? Thanks, Clare Sutton

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John(UK)

06-08-2007 11:59:30




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 Re: Fost Plugs? in reply to Clare Sutton, 06-07-2007 13:15:57  
There are two of these and they should have a split pin through each, it should be inserted from the inside of the Clutch housing and the split pin or cotter pin (whatever you wish to call it) should be slack enough to move easily and vibrate, this is to let any oil that gets into the Clutch Housing drain out. The front one just behind the engine is to drain any oil from the Rear Crankshaft seal and the oil will be black, the Rear one of the two is just forward of the Transmission and allows any oil from the drive from the Engine into the Transmission to drain, it also allows any oil to drain that may come out of the Transmission from the bearing Housings on the front and the top oil seal on the selector rail. the oil from this one will be green or creamy coloured. You should check the dipstick for the transmission, this is on the right side on the round plate just below the Hydraulic Lever. Check that it is not overfull on the dipstick, if it is at the correct level on the dipstick as a second check just to make sure that it isn't the wrong dipstick, remove the bottom setscrew on the round inspection plate and the oil should just run out slowly, if it runs out quickly it is too full and needs to come out or it will leak wherever it can, usually onto the brakes and into the Clutch Housing. You mention one of these holes is on the side, I can't recall any holes on the side of a TEA tractor, perhaps you would like to check that one again and give more detail as to where it exactly is...John

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John (Ont)

06-08-2007 03:37:16




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 Re: Fost Plugs? in reply to Clare Sutton, 06-07-2007 13:15:57  
Sounds like you are referring to the drain hole at the bottom of the transmission case (should have a cottor pin in it) and maybe the timing hole at the front of the flywheel cover. These should not be plugged as oil or transmission fluid the leaks past the seals has to drain out the bottom so it dosn't get on the clutch.



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Bob (Aust)

06-08-2007 00:05:10




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 Re: Fost Plugs? in reply to Clare Sutton, 06-07-2007 13:15:57  
Would that be a Welsh Plug? Usually approx 1 inch round, convex, fits into a hole in the block casting through to the water gallery.

Once pushed in, tap on the convex dome to spread the plug and fill the hole in the block.

They are usually removed at engine overhaul to flush out the engine coolant. Occasionally they rust out too..... ...

If so, I would be very surprised if they were designed to pop out if the coolant freezes. But what would I know - only beer fridges get that cold here! I have an aversion to ever living (or visiting) any place where an engine coolant may freeze!

With a mixture of Aussies, British and Americans on this forum, I think we need a translation service!!

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Bob (Aust)

06-07-2007 20:00:11




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 Re: Fost Plugs? in reply to Clare Sutton, 06-07-2007 13:15:57  
How interesting..... . I also have a 1953 TEA20-85. Didn't notice any "frost plugs" anywhere?? Can't say I've noticed any Welsh Plugs in the engine block either??

Mind you, if the coolant in my tractor ever freezes where I live in Australia, it will be the depths of the next Ice Age in North America and Europe!!!

Mid winters day here today. It is a very cool 19 Celsius - 66 degrees Fahrenheit!

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Bob (Aust)

06-07-2007 16:26:32




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 Re: Fost Plugs? in reply to Clare Sutton, 06-07-2007 13:15:57  
What is a "frost plug"?



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john [mo]

06-07-2007 19:28:02




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 Re: Fost Plugs? in reply to Bob (Aust), 06-07-2007 16:26:32  
i believe it is a freeze plug. these protect engine blocks from cracking. i wonder why tractor blocks do not have them like continental engines.if your coolant freezes the plugs pop out supposed to relieve the pressure.



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Gerald J.

06-07-2007 22:27:07




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 Re: Frost Plugs? in reply to john [mo], 06-07-2007 19:28:02  
Don't believe that a "freeze plug" will pop out when the engine freezes. Actually its there to plug a hole needed to hold mold parts to make the casting and it probably won't pop out with freezing but will hold and the block will crack. Else there'd be no cracked blocks.

Gerald J.



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JohnMB

06-10-2007 10:11:34




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 Re: Frost Plugs? in reply to Gerald J., 06-07-2007 22:27:07  
I think GeraldJ is correct. The original name I remember is core plug. The opening it closes is used in the casting process to support the baked core sand part that forms the water jacket.



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Clare

06-07-2007 19:27:02




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 Re: Fost Plugs? in reply to Bob (Aust), 06-07-2007 16:26:32  
A frost plug is a metal plug that is pressed into a hole in the block (some place where it is suseptable to freezing) like a cooling channel. The plug will pop out instead of cracking the block.



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