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Help!! Oil pump drive pin for AC D-15

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Doc Holiday

02-23-2004 13:34:39

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I am in the process of reassembling a AC D-15 Series II engine and am replacing the pin in the camshaft that drives the oil pump.

The original pin was rivited (flattened) on either end to hold it in the camshaft.
The new replacement pin (Agco part #70910946 or 910946) is a hardened pin that is too hard to be rivited in place. I have broken two center punches and have only knocked a small piece out of the pin.

I have spoken with numerous dealers and have found that the original was a 5/32"X 1 1/4 plain pin. They also tell me that the pin is supposed to be rivited in place.

From the looks of it it appears that somewhere a incorrect substituation has been made in the material of the pin at AGCO, I have called every dealer I can find and cannot find any NOS pins, only the new replacement hardened pin.
I am toying with the idea of using a 5/32" rivit but am afraid it will wear out very quickly.

I really need to get this engine out of my shop.

Any suggestions??



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Phill Snartland

02-24-2004 11:29:00

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 Re: Help!! Oil pump drive pin for AC D-15 in reply to Doc Holiday, 02-23-2004 13:34:39  
What about silver-soldering or brazing the cross-pin in place instead of rivetting?

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Doc Holiday

02-24-2004 12:03:31

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 Re: Re: Help!! Oil pump drive pin for AC D-15 in reply to Phill Snartland, 02-24-2004 11:29:00  
The pin hole is right next to one of the cam lobes and I'm afraid any heating would ruin the temper of the lobe.

I did find some 5/32" piano wire that seems to be very similar in material to the original pin...I will do some testing later today and see if is similar in harness to the original.

The way it looks now going that route is about the only option.

Thanks for the responce!


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Dick L

02-24-2004 17:15:26

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 Re: Re: Re: Help!! Oil pump drive pin for AC D-15 in reply to Doc Holiday, 02-24-2004 12:03:31  
I have used roll pins for years to replace worn pins. Make sure the groove is not facing the pump fork as to cause cutting into the pump fork.

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Doc Holiday

02-24-2004 20:03:43

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 Re: Re: Re: Re: Help!! Oil pump drive pin for AC D in reply to Dick L, 02-24-2004 17:15:26  
Never thought about using a roll pin!

They are made of a fairly hard material....hmmm

Do you safety wire the pin in place?

Or maybe drive a smaller pin inside of the larger one as well?

Thanks for the great idea!


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Dick L

02-25-2004 18:37:09

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 Re: Re: Re: Re: Re: Help!! Oil pump drive pin for in reply to Doc Holiday, 02-24-2004 20:03:43  
No I dont fasten them in any way. You will probably have to ream the hole a little to get a larger pin to where it takes a lot of force to hammer it in. I would have to go out and mesure my roll pin stock for the size but the standard roll pin for that hole is a little loose. The next size larger will almost drive in but not quite.

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