Oil pump question

[04customking]

I want to change the cast iron pump to the shovelhead aluminum pump. Are there certain years that I should look for? Stay with stock HD or S&S? They plumb up differently don't they?

[MBSKEAM]

why?
is the old pump worn out?

mbskeam

[04customking]

Mike, the thing still sumps and I've tried burnishing the seats and then when that didn't work I tried dressing them. I replaced the balls and springs and it still gets by. I've heard the aluminum ones can be burnished easily if there is a problem. Is my info incorrect?

[Pzokes]

There is a book that I think is called "What Fit's What".  It has the years listed in it.  The years may be 1968-1972, but you'd have to verify it.  It would be tough to find a 40 year old aluminum pump in excellent condition, but I think that the aftermarket is reproducing them.  I have an early S&S pump on one bike.  But, they are made a little different now, and I haven't used a new one.  The shaft length is different on the newer pumps, so you will have to remove the timing cover to install the longer shaft for the newer aluminum pump.

[ricochet]

I can't answer the question directly but if you need info about the variations and how to sort what passages do what, etc.  the oil pump instructions in the S & S site does a good job of detailing it.  It's the same instructions that comes with all their pumps.

ricochet

[Pzokes]

ricochet's idea of getting the instructions off the S&S site is probably the best idea.

[04customking]

Thanks guys, maybe I'll just play with this one some more. Now that it's running better I'll ride it more and then I won't have to worry about it right?

[Pzokes]

Yeah, you could either ride it a lot or find an old cafeteria tray to put under it to catch the oil.

[xlfan]

Do you run an oil filter in your system? If not, it could be contamination causing the leakdown.


xlfan

[04customking]

yea, I run a filter.