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MF35 Siezes After Warm up

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Axtell
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PostPosted: Wed Dec 20, 2017 3:47 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote


It was already broken all the way. I just sorta pushed them prices together for the photo. I assume that shaft is pressed in the housing? I was not the one who put the engine back together. I just mounted it back on the tractor. Here are the two pieces.



 
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ptfarmer
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PostPosted: Wed Dec 20, 2017 10:41 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote

It has been cracked like that for a while. That shaft is supposed to be a press in fit.
 
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Axtell
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PostPosted: Thu Dec 21, 2017 9:07 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote

ptfarmer wrote:
(quoted from post at 11:41:27 12/20/17) It has been cracked like that for a while. That shaft is supposed to be a press in fit.


It has been sitting under the shed parked since March or April. Just getting around to it. I showed the oil pump to the folks that rebuilt it and they were at a loss of what happened. They just told me to bring the engine in so they can inspect and bearings and such and will look further into what happened with the oil pump.
 
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Axtell
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PostPosted: Thu Dec 21, 2017 9:17 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote


Yep, sure does. Attached the pics of the counter bore. Looks a bit wallered out with a sharp ridge.




 
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Axtell
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PostPosted: Thu Dec 21, 2017 9:19 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote


Above reply to John Deere D from previous post
 
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John Deere D
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PostPosted: Thu Dec 21, 2017 6:17 pm    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote



Owner Operator MF FE 35 X 3 cylinder Perkins:


 
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John Deere D
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PostPosted: Thu Dec 21, 2017 10:17 pm    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote

Was Oil pump a new pump on last Engine Major?

Any I've replaced on an overhaul fit snugly but did NOT require a Hammer:

Bob...

 
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ptfarmer
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PostPosted: Fri Dec 22, 2017 4:52 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote

I wouldn't be surprised if its a aftermarket pump, some aftermarket parts just don't fit like they should.
 
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Axtell
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PostPosted: Fri Dec 22, 2017 5:27 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote

ptfarmer wrote:
(quoted from post at 05:52:32 12/22/17) I wouldn't be surprised if its a aftermarket pump, some aftermarket parts just don't fit like they should.


I was wondering about that. There are three bolts that mount that pump in. You would think there would not be much room for error on the counter bore unless lose or too much play. The counter bore seems to be run out a bit. Not sure what came first.

Also it seemed the crankshaft gear was what stripped the idler gear, but it looks like that gear is wider and the idler gear and would not have left a channel dug out down the middle, but the oil pump gear itself fits right in. I was able to spin that gear with my fingers, but can't remember if I did that in both directions.
 
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Axtell
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PostPosted: Fri Dec 22, 2017 7:59 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote

CVPost-John Deere D wrote:
(quoted from post at 23:17:17 12/21/17) Was Oil pump a new pump on last Engine Major?

Any I've replaced on an overhaul fit snugly but did NOT require a Hammer:

Bob...

The oil pump should have been replaced on the last rebuild.


 
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Axtell
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PostPosted: Fri Dec 22, 2017 8:01 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote


Sorry for the double post.

The oil pump should have been replaced on the last rebuild.
 
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Axtell
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PostPosted: Wed Jan 10, 2018 2:21 am    Post subject: Re: MF35 Siezes After Warm up Reply to specific post Reply with quote

Just got back from the machine shop and it looks like the only casualty was the middle crank journal/bearing which most likely caused the seize and can be repaired. Everything else looks ok, but they did mention the middle piston had a sharp edge on one of the rings. I forgot to ask what may have caused that or what that means. The only thing they can think of going forward is to just replace the oil pump and put it back together. I guess we are lucky but will always wonder what could have cause it. I did mention the fitmemt of the oil pump shaft Into the counter bore in the main bearing cap.

Thanks for all the help!
Axtell
 
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