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914World.com _ 914World Garage _ H.D. Oil Pump Drive

Posted by: Headrage Dec 31 2004, 02:32 PM

I have a new H.D. oil pump I want to use. I am wanting to reassemble the cases today but I forgot about the 1mm maching that needs to be done on the drive tang to prevent it from preloading the cam. It this something that can be done using a bench grinder or do I need to wait until next week IPB Image and find a machine shop?

Posted by: Headrage Dec 31 2004, 03:01 PM

IPB Image Anybody? Kinda like to do this today if possible. I'll even post pics.

Posted by: Dominic Dec 31 2004, 03:11 PM

I've done this on the bench grinder before, just make sure you don't take off too much, best to accurately measure it with a mic or a caliper. Don't let it get too hot when your grinding, dip it in some oil or water.
No big deal.

Posted by: Headrage Dec 31 2004, 03:13 PM

Thanks. I'm goin in.....

Posted by: dlee1967 Dec 31 2004, 03:14 PM

I used a file for better control so that I could get a square edge. No overheating issues either. DLee

Posted by: Headrage Dec 31 2004, 03:54 PM

Okay, I might have screwed the pooch. Anyone know what the minimum height the tang has to be. I'm looking at approximately .275 after grinding.

Posted by: KenH Dec 31 2004, 04:14 PM

I have put in 2 and had NO problem. Try and assemble before you grind it. Put some white gease on the tang or inside the slot to see if it rubs off on the matching part.

Ken

Posted by: Headrage Dec 31 2004, 04:22 PM

Already done. I am hoping I still have enough length on this thing to work. I don't know why they say to grind it down. I measured the stock pump from the case mating surface to the end of the tang was almost identical to the new one.