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Replace the o-rings on the oil tubes?

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Geo-TH,In

09-24-2023 12:40:16

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How do you Replace the o-rings on the 2 oil tubes that go to the rocker arms on the valve train?

Where can I buy the o-rings?

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counterclockwise

09-24-2023 17:26:49

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Re: Replace the o-rings on the oil tubes? in reply to Geo-TH,In, 09-24-2023 12:40:16

Not oring . The supply tube has a sealing ring (square profile) on the lower end. No seal on the top where it enters the rocker support. The naa Im working on had all the oil holes in the rocker shaft plugged with 70 years of crud. Had to completely disassemble the rocker shaft and remove the plugs from each end to properly clean it. The sealing ring for the supply tube was in my gasket kit.

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Geo-TH,In

09-25-2023 01:01:02

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Re: Replace the o-rings on the oil tubes? in reply to counterclockwise, 09-24-2023 17:26:49

Thanks for your post. Everyone on Tractor talk kept telling me everything is normal, don't make a mountain out of a molehill, just run the snot out of it.

I have rust on my push rods. That tells me lack of oil.
If I followed their advice and did nothing, I can see lifters and cam failure.

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Bob N.Y.

09-25-2023 06:00:24

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Re: Replace the o-rings on the oil tubes? in reply to Geo-TH,In, 09-25-2023 01:01:02

Did you read my reply to your post about 10 down from this one?

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Geo-TH,In

09-25-2023 07:35:08

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Re: Replace the o-rings on the oil tubes? in reply to Bob N.Y., 09-25-2023 06:00:24

Your reply is gone.

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John P.

09-24-2023 13:28:41

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Re: Replace the o-rings on the oil tubes? in reply to Geo-TH,In, 09-24-2023 12:40:16

Quoting Removed, click Modern View to see

I just had to buy a couple to put the head back on my 950. Cost $2.92 each.

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wore out

09-24-2023 13:04:31

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Re: Replace the o-rings on the oil tubes? in reply to Geo-TH,In, 09-24-2023 12:40:16

Quoting Removed, click Modern View to see

Parts catalog only shows and lists a quantity of ONE, Key #37, at the bottom end of the supply tube (likely visible behind the ''tappet cover'' on the side of the block), #EAA6594A (a ''square cut packing'').

Third Party Image

Probably none used at the top, and the other ''overflow/return line'' sure wouldn't need one. Or, are there a couple hiding there???

Link

If no FIAT/dba CNH dealer nearby, your very favorite place on the whole earth/'net has them.

Link

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Geo-TH,In

09-24-2023 14:15:38

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Re: Replace the o-rings on the oil tubes? in reply to wore out, 09-24-2023 13:04:31

''overflow/return line''
Are you saying the front tube is the supply like and the back tube is the return line?
That would explain a lot.

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Andy Wickiser

09-24-2023 15:28:59

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Re: Replace the o-rings on the oil tubes? in reply to Geo-TH,In, 09-24-2023 14:15:38

George, this diagram and description might help.

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Geo-TH,In

09-24-2023 15:47:58

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Re: Replace the o-rings on the oil tubes? in reply to Andy Wickiser, 09-24-2023 15:28:59

Andy,
I've been exchanging emails with Old Richard.

He was the first person to tell me my valve train should not be dripping oil, but the oil should be flowing at a small steady stream and I should check the O-ring.

Thanks for all your help, the diagrams and where I can buy the O-ring.

IF the oil comes in at the front of the engine and exits from the rear the engine, that will explain why the last valve, exhaust valve for #4 cylinder was stuck open..no oil was making it way to #4.

The lack of a good flow of oil on top of the head will also explain why what little oil on top of the head looks like milk.

I think we figured what caused the #4 exhaust valve to stick open. My money says once I get the oil flowing at the right rate, the milky oil on the top of the head will be washed to the crankcase and settle in the bottom of the crankcase.

Thank you, thank you.
AND A BIG THANKS TO OLD!!

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