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Allis Chalmers Discussion Forum

Saturday Came Early

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Dick L

09-28-2007 07:23:53

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Here is a picture of the pin located in the cam shaft. This pin will have to be replaced because of the wear you can see.

third party image

You can see in this picture where the pin goes thru the cam.

third party image

This is the end of the oil pump the fits inside the cam shaft over the pin in question. This slot causes the wear on the pin.

third party image

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Cranksum

09-28-2007 08:08:04

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Re: Saturday Came Early in reply to Dick L, 09-28-2007 07:23:53

Think you are correct. The pin I found looks nothing like this one pictured. It looks more like the butterfly shaft from a carb with out the holes in the slotted part of the shaft. In the second picture you send it shows what appears to be a pin in the cam shaft before the first lobe. Would this pin be in the block or out?

Thinking I might need to prime the pump. When I parked the tractor when it was working ok it was parked in about a 15 degree slant which caused the oil to run away from the filter side of the engine. Maybe thats all it is??

Thanks for all your help.

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Dick L

09-28-2007 08:38:47

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Re: Saturday Came Early in reply to Cranksum, 09-28-2007 08:08:04

The pin is inside the block. The pump bolts to the back of the block.
It might just need primed. No way I could say for sure. How you parked the tractor should not cause the pump to loose prime in its self. The pump holding its prime is done much like holding you finger over a drinking straw. The straw will hold liquid until you lift your finger and let air in. You can (normally) remove the oil tubes from the filter and head and not loose prime.

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cranksum

09-28-2007 11:41:49

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Re: Saturday Came Early in reply to Dick L, 09-28-2007 08:38:47

I have the oil pan removed. Should I be able to see the pin?

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Dick L

09-28-2007 15:50:11

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Re: Saturday Came Early in reply to cranksum, 09-28-2007 11:41:49

You could see where it is or was with a flash light (if the cam is turned just right)
It is inbetween the block and the first lobe. I can just see the pin with my computer.

third party image

IF I had not had to run to town the last two nights I would have had this engine buttoned back up.

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cranksum

09-29-2007 06:39:33

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Re: Saturday Came Early in reply to Dick L, 09-28-2007 15:50:11

How do you insert picture into message? Took a picture of the pin but don't see how to add it in.

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cranksum

09-29-2007 06:57:17

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Re: Saturday Came Early in reply to cranksum, 09-29-2007 06:39:33

This is the pin I found in the pan.

Thanks

wayne

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cranksum

09-29-2007 06:56:22

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Re: Saturday Came Early in reply to cranksum, 09-29-2007 06:39:33

This is the pin I found in the pan.

Thanks

wayne

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cranksum

09-29-2007 06:58:05

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Re: Saturday Came Early in reply to cranksum, 09-29-2007 06:56:22

Trying it again!

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cranksum

09-29-2007 07:01:01

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Re: Saturday Came Early in reply to cranksum, 09-29-2007 06:58:05

Ok, got it this time!!

Link

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Dick L

09-29-2007 11:38:08

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Re: Saturday Came Early in reply to cranksum, 09-29-2007 07:01:01

It sure looks like it could be the oil pump pin. They are peened on the ends. Nothing in the picture to compair the size with.

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cranksum

09-29-2007 14:52:46

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Re: Saturday Came Early in reply to Dick L, 09-29-2007 11:38:08

Here is a better picture.

Link

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Dick L

09-29-2007 16:36:24

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Re: Saturday Came Early in reply to cranksum, 09-29-2007 14:52:46

That would be the pin to drive the oil pump. Rather than sheer off it had to come loose and work out down into the pan. Any I took out of a cam were really tight in the hole after the peened end was ground away.

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cranksum

09-29-2007 17:45:47

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Re: Saturday Came Early in reply to Dick L, 09-29-2007 16:36:24

Well ok then... Thats what I thougt after looking at the pictures.. Not to sure what to do with it and if it's worth is or not. Having to split the tractor and I'm guessing having to remove the head and all to get to the cam. Then the problem of finding the pin or something that will work. Not having a garage to tare it down might just end up parting it out maybe..

Thank you for all your help Dick L.

Wayne

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