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Ford 9N, 2N & 8N Discussion Forum
Show Parts for Model:

cotter pin port on 8N

Author  [Modern View]
Mr. T. Minnesota

04-06-2014 15:05:16
68.170.114.158



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Forum Members,
Have been running the 8N all winter moving firewood and snow. Yesterday when removing my wood bucket the N went into a fair tilt, not dangerous but more tilt that ninety per cent of the time. Later in the day I noticed a small puddle of oil below the cotter pin opening between the engine and transmission. Not sure where the oil came from yet, either the engine or transmission. Engine was recently overhauled. Wondered if oil had been setting in an isolated cavity and when tilted it flowed out of the cotter pin opening when on the level again?? Is this typical??
Mr. T. Minnesota

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NNP

04-07-2014 05:48:37
66.66.112.196



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 Re: cotter pin port on 8N in reply to Mr. T. Minnesota, 04-06-2014 15:05:16  
another vote for leaving it be and keeping an eye on it.

Most I've split have a LOT of grease/dirt/mouse nest debris buildup in the case,

usually building a 'dam' around the drain hole.

Oil from seeping seals is usually laying in the bottom, unable to drain normally.



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Bob

04-06-2014 17:29:34
64.255.159.192



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 Re: cotter pin port on 8N in reply to Mr. T. Minnesota, 04-06-2014 15:05:16  
These old machines, even when new, were not as clean, sterile, and leakproof as what we expect today. That's why there's a drain hole with a jiggling cotterpin to keep it open of dirt!

Unless the front tranny seal and the rear crankshaft "rope seal" are PERFECT, they will mark their territory a bit from time to time.

(IS there such a thing as a "rope seal" that seals perfectly?)

It's your call how much "marking it's territory" you will put up with before tearing it down, and attempting to make it a bit better.

It wouldn't be the first "N" that gets parked over a shallow pan of kitty litter to keep oil drops off of the garage floor (IF it's nearly housebroken and lives inside)!

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Colin King

04-06-2014 17:23:52
67.233.242.239



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 Re: cotter pin port on 8N in reply to Mr. T. Minnesota, 04-06-2014 15:05:16  
Put a piece of white cardboard, or even a sheet of paper taped to some cardboard backing under the cotter pin. If it's engine oil, it'll be very dark (unless you just changed it). If it's from the tranny, it should be a golden, a light brown, or reddish, depending on the fluid you use.

Enjoying the weather? Looks like we may hit 70* Wednesday.

Colin, MN



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R Geiger

04-06-2014 16:44:08
50.39.141.219



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 Re: cotter pin port on 8N in reply to Bob, 04-06-2014 15:05:16  
I would keep an eye on it for awhile before I started splitting it. If it is a steady occurrence then yes open it up.



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Bruce (VA)

04-06-2014 15:21:50
24.125.183.11



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 Re: cotter pin port on 8N in reply to Mr. T. Minnesota, 04-06-2014 15:05:16  
" Is this typical??"

Nope.

You've got a seal failure.

Rear engine crank seal or front transmission seal.

Chances are the rear crank seal was replaced in the overhaul. And, when it was split, you should have replaced the front transmission seal.

No need to guess though; is it oil or hydraulic fluid?

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Mr. T. Minnesota

04-06-2014 16:20:20
68.170.114.158



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 Re: cotter pin port on 8N in reply to Bruce (VA), 04-06-2014 15:21:50  
Bruce, I checked the fluid that came out and have a feeling it is the engine seal. I have never taken apart an N tractor. Any basic hints for the novice that are not covered in the manual? If taken apart I want to check the oil pump too, it does not hold a decent pressure when hot. Any additional thoughts are welcome.
Mr. T. Minnesota



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Bruce (VA)

04-06-2014 17:39:21
24.125.183.11



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 Re: cotter pin port on 8N in reply to Mr. T. Minnesota, 04-06-2014 16:20:20  
As others are telling you, I'd leave it be until it shows up on the dipstick. Just park it on level ground!

What kind of oil pressure do you have?

Unfortunately, a worn pump is not the usual cause of low oil pressure; it's worn bearings.



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Jimmyjack

04-06-2014 17:10:41
216.105.210.95



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 Re: cotter pin port on 8N in reply to Mr. T. Minnesota, 04-06-2014 16:20:20  
If its not a steady occurance I wouldnt get too excited yet. Mine does that once in a while when I load it on the trailer. Suspect that the angle when loading it causes some puddling to run out.



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Bill Crowell

04-07-2014 07:29:35
216.57.75.194



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 Re: cotter pin port on 8N in reply to Jimmyjack, 04-06-2014 17:10:41  
It's a good thing that your 8N leaks oil because you won't have to kill the weeds where you park it.



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