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Order Ford 901 Parts Online

Re: Ford 901 Select O Speed Mystery

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Author  [Modern View]

05-20-2013 11:30:20

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It will help because the gas engine does not create the harmonic vibrations that the diesel engine does . The vibrations come from the firing pulses in the engine the gas engine has about 7.1 compression ratio and the diesel has a 17.1 compression ratio so when it fires the force of the explosion in the cylinder in the diesel is much more violent than that of the gas which causes the vibration . As I said before if you were to x-ray or look at the tube under a microscope you see cracks that look like shattered tempered glass resulting in plain ole metal fatigue so by using the gas engine tube it is the closest thing to a NEW tube for less money . The balancer kit was added to almost every tractor with a Diesel engine in it . All 1958 and 1959 were add on kits starting in 1960 they were assembly line installed . If you pull the drain plug out of your tractor and it has a screen on it just like your 8N tractor it DOES NOT HAVE Balancer kit in the engine , if it has no screen on it you will be able to see the oil pump screen when you look in the hole in the oil pan and you will not be able to see anything else , the screen completely covers the opening for the drain plug .

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05-20-2013 12:13:32

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 Re: Ford 901 Select O Speed Mystery in reply to TONY JACOBS, 05-20-2013 11:30:20  
Quoting Removed, click Modern View to see


Our tractor is a 1960 model and does not have a screen on the oil plug. The oil pick up covering the opening. So we do have the balancer kit on it. We are willing to take a chance with the welding and rubber hyd hose to act as a dampener. We are going to get a back up incase it does fail. The higher compression does make sense of why there is more vibrations. I am happy to hear that our engine has the balancer on it.
The SOS has been apart before. Hints the bearing pieces and no failed bearing. Anyways I believe they rebuilt the transmission and they put it back together without o-rings on the tube and then it failed shortly after and they gave up. There is not much wear on the tractor since the SOS was rebuilt. The only thing that looked bad was the input shaft. It was more than half way worn away. The rest of the tansmission, gear sets, bands and other componets virtually look either replaced or new.
Thank you for your help.


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John Smith8N

05-20-2013 12:00:56

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 Re: Ford 901 Select O Speed Mystery in reply to TONY JACOBS, 05-20-2013 11:30:20  

I avoid diesels, so I know nothing about them. No doubt the vibration is hard on those pressure tubes and other components. But just to note, it's not limited to diesels only. I've been into several gas tractors with broken pressure tubes in the SOS and have sold used tubes to several people who have found broken ones in gas tractors. Might be a lot more common in diesels, but a gas engine isn't a guarantee of a good tube. Just sayin'.

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05-21-2013 18:56:06

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 Re: Ford 901 Select O Speed Mystery in reply to John Smith8N, 05-20-2013 12:00:56  
Hello John , Yes you are absolutely correct also , because many of these tractors could have been originally diesels then converted to gas or just changed transmissions over the years or just possible a gas one did break the tube too , most guys would not know what they were originally or even care what they were or even bother to look they would have just wanted them fixed so they could get back to work . Thanks Tony

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