Board index Flathead Power-Technical Questions, Answers, and Suggestions 45 Flatties Oil Pump Check Ball Burnishing Tool

Oil Pump Check Ball Burnishing Tool

Moderators: Curt!, Pa

Post Thu Feb 06, 2014 9:57 pm

Posts: 349
Location: Champaign-Urbana, IL
I don't have any personal experience with either the seller or the product, but I thought somebody might be interested ...

Resurrection Cycle, who seems to have been around for quite a few years, is advertising a new run of their specialty burnishing tool:

http://www.resurrectioncycle.com/oilpumptool.html

Obviously, if anybody has any specific experience with their product, it might be worth sharing.

Mark

Post Sun Feb 09, 2014 3:47 pm
jib

Posts: 575
Location: devon,england
didnt someone on here say there was a problem with the seats not being central?
Dude, check out that jibhead, he's crazy. Hasn't been sober for 40 years

Post Tue Feb 11, 2014 8:39 am

Posts: 3061
Location: Central Illinois, USA
Twas I, Jib.

Burnishing was my "better idea', and I regret it greatly.

I no longer endorse burnishing. It has turned out to be a great embarrassment and loss for me, as the variations in pumps and their materials is too great. Some bodies are "chilled", and will only damage the burnisher, and chip the seat badly.

Upon developing different dressing tools, lapps, and burnishers, it became apparent that there was no way to accurately pilot off of the pump body cap threads, as they were quite often inconcentric with the seat.
Thus the only effective tool in my kit was a flat-bottomed stone, used to relieve the old seat to a sharp edge.

Upon bench testing with bubbles, it soon became obvious that was the best one can do, as any angle-grinds, burnishing, lapping, or even beating with a drift only made leakage worse, and occasionally did damage.

I would post pics, but the site's format will no longer accept my browser.

.....Cotten

Post Tue Feb 11, 2014 12:55 pm
Pa Site Admin

Posts: 5673
Location: Ohio USA

Cotton.....email me your pics and I will put them up for you.

Post Tue Feb 11, 2014 1:13 pm

Posts: 3061
Location: Central Illinois, USA
Pa!

I tried to email you through the site for that last thread.
I then got on my wife's modern computer, and it wouldn't upload either..

.....Cotten

Post Tue Feb 11, 2014 8:00 pm

Posts: 750
Location: Pa. , USA
Soooo that sweet burnishing tool I purchased a couple years ago should be scrapped ?
Vintage roadracing, Class C, AHRMA # 335

Post Wed Feb 12, 2014 6:54 am
Pa Site Admin

Posts: 5673
Location: Ohio USA

Cotten wrote:
Pa!

I tried to email you through the site for that last thread.
I then got on my wife's modern computer, and it wouldn't upload either..

.....Cotten


Cotton. Email me direct. vtwinrebuild@yahoo.com

Post Wed Feb 12, 2014 10:03 pm
Pa Site Admin

Posts: 5673
Location: Ohio USA

Image

Image

Post Fri Feb 14, 2014 1:06 pm

Posts: 903
Location: Hill City, Ks. USA

Damn, sorry that didn't work out. I've burnished a couple of oil pumps, but never checked for leakage after i got done. I just assumed they were better of than when i started.
Curt!

Post Fri Feb 14, 2014 1:30 pm

Posts: 3061
Location: Central Illinois, USA
Well, Tim,..

They work safely on aluminum pumps!

Still, inspite of some phenomenal successes,
I must abandon the whole notion based on bubbles.

Bubbles don't lie.

I lost a lot of time, effort, and a significant investment on this folly.
It would seem a burnisher might work best if the screw threads are very, very loose in the cap.
But the chance of damage to a "chilled" pump overrides the benefits.

Nobody is more sorry than I,

....Cotten

Post Thu Feb 20, 2014 2:22 pm

Posts: 20
Location: MA, USA
Cotten;
Can you provide some detail to how you are testing the pumps exactly. You mentioned bubbles.....

thanks

Post Thu Feb 20, 2014 2:50 pm

Posts: 3061
Location: Central Illinois, USA
Bluesman!

As you can see in the last attachment, a regulator was used to supply minimal airpressure to the ballcheck "well", with a golf tee crammed into the exit feed gallery.
Thus any air escaping the ball and seat will be displayed by a little soapy water as bubbles.

I spent days on several seats without ever getting a perfect seal.

....Cotten

Post Thu Feb 20, 2014 4:11 pm

Posts: 20
Location: MA, USA
Really nice test setup. Is it possible that the high viscosity 50W oil under only the slight gravity (head) pressure from the oil line and tank is acts a lot differently than water under several PSI of air pressure and that is why you could never get a perfect seal? I wonder if they would not drip under just gravity pressure with 50W oil in a 2 foot vertical tube??

Reason I am asking, is I need to come up with a test myself. I have 3 pumps that all leak!

Post Thu Feb 20, 2014 4:46 pm

Posts: 3061
Location: Central Illinois, USA
Bluesman!

The regulator and soap solution are something everyone should use every time a manifold is assembled.
Cheap Arbor Frate trinkets work quite well.

Of course oil will behave differently than air, but bubbles are absolute and undeniable. Nothing is missed. I only wish we could put a number on them.

Please post pics of your tests, if the forum format will allow it.
Timing your reservoir drain certainly puts a number on it, but don't we really want to cut straight to "zero"?

The Factory apparently drilled the "well" in one operation, and tapped it for the cap in a different set-up, causing the inconcentricity.
The well had a flat bottom, possibly from an end-mill, and a hole poked in the middle that the ball rests in.
Our Historical mystery is: What else did they do for a seat?

I'm thinking: nothing.

....Cotten


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