Anyone know how to press the crankshaft apart?

[tgm_enterprizes]

I am trying to figure out how to un-press the crankshaft (have a sacrificial crank to practice on). So if you have seen this done I can use whatever hints or instructions you can provide.
Also, anyone have the number on the bearings?
Thanks,
Richard

[Bill]

There are several problems with pulling the crank shaft apart and putting it back together.  First is that there were several different ends to the crank shaft covering over 10 thousands difference in bearing sizes.  Then if the reason for pulling it apart is to put another rod in then think about the bearing cages that hold the rollers.
 The cages for the outer or end bearings are made to hold single rollers; the cages for the rods are made to hold two rollers in each opening.  The reason the rods are loose is because the bearing cages are worn to a point that they are no longer holding the rollers in their proper position for a while causing the outer race or rod opening to be wider.  Larger diameter looser the rod is.  But the ware doesn’t stop there, because the pin that is holding the crankshaft together and where the rod is rotating on is also worn.
The reason all this is happening is because a small piece of metal (ground up metal from the transmission most likely) has flowed into the oil passage and into these bearing cages where they chewed up the aluminum bearing cages not only on the rods but the two center bearings too.  And that one rod you thought was doing well, it most likely has ware on its bearing cage too.
So, if pulling the crank shaft apart to put half of another side of a crank shaft to it is the goal, there are many reasons it will not work.
Just my experience…
Bill

[dana]

Actually, my goal was to put brand new bearings on the crankshaft and the rods. Since I have never had one apart, I wasnt sure what is wearing. I dont have a bad crankshaft that I know of.
Makes perfect sense that the cage is the problem. But I was assuming that a new bearing (brand new not used) would come with the cage as well. I know for a fact that there is a person that rebuilds the crankshaft and replaces all the bearings. But its a pricey piece of work.
I have also been advised that the bearings are hard to find.  Which was why I asked for bearing numbers.
Richard
Sent from my iPhone

On May 1, 2019, at 12:26 AM, 'Bill'
billmyong@...
[anzhonda600owners] wrote:
There are several problems with pulling
the crank shaft apart and putting it back together.  First is that there were several different ends to the crank shaft covering over 10 thousands difference in bearing sizes.  Then if the reason for pulling it apart is to put another rod in then think about the bearing cages that hold the rollers.
The cages for the outer or end bearings are made to hold single rollers; the cages for the rods are made to hold two rollers in each opening.  The reason the rods are loose is because the bearing cages are worn to a point that they are no longer holding the rollers in their proper position for a while causing the outer race or rod opening to be wider.  Larger diameter looser the rod is.  But the ware doesnt stop there, because the pin that is holding the crankshaft together and where the rod is rotating on is also worn.
The reason all this is happening is
because a small piece of metal (ground up metal from the transmission most likely) has flowed into the oil passage and into these bearing cages where they chewed up the aluminum bearing cages not only on the rods but the two center bearings too.  And that one rod you thought was doing well, it most likely has ware on its bearing cage too.
So, if pulling the crank shaft apart to
put half of another side of a crank shaft to it is the goal, there are many reasons it will not work.
Just my experience&
Bill
From:
anzhonda600owners@yahoogroups.com
[
mailto:anzhonda600owners@yahoogroups.com
]
Sent:
Tuesday, April 30, 2019 5:26
PM
To:
anzhonda600owners@yahoogroups.com
Subject:
[anzhonda600owners]
Anyone know how to press the crankshaft apart?
I am
trying to figure out how to un-press the crankshaft (have a sacrificial crank to practice on). So if you have seen this done I can use whatever hints or instructions you can provide.
Also, anyone have the number on the bearings?
Thanks,
Richard

[dgrandinett]

Do you happen to have the contact information for the guy who can do or has done crankshaft rebuild work?

> On May 1, 2019 at 1:55 AM "Richard Morris tgm_enterprizes@... [anzhonda600owners]" wrote:
> Actually, my goal was to put brand new bearings on the crankshaft and the rods. Since I have never had one apart, I wasn’t sure what is wearing. I don’t have a bad crankshaft that I know of.
> Makes perfect sense that the cage is the problem. But I was assuming that a new bearing (brand new not used) would come with the cage as well. I know for a fact that there is a person that “rebuilds” the crankshaft and replaces all the bearings. But it’s a pricey piece of work.
> I have also been advised that the bearings are hard to find.  Which was why I asked for bearing numbers.
> Richard
> Sent from my iPhone
> On May 1, 2019, at 12:26 AM, 'Bill'
> billmyong@...
> [anzhonda600owners] anzhonda600owners@yahoogroups.com
> > wrote:
> > There are several problems with pulling the crank shaft apart and putting it back together.  First is that there were several different ends to the crank shaft covering over 10 thousands difference in bearing sizes.  Then if the reason for pulling it apart is to put another rod in then think about the bearing cages that hold the rollers.  The cages for the outer or end bearings are made to hold single rollers; the cages for the rods are made to hold two rollers in each opening.  The reason the rods are loose is because the bearing cages are worn to a point that they are no longer holding the rollers in their proper position for a while causing the outer race or rod opening to be wider.  Larger diameter looser the rod is.  But the ware doesn’t stop there, because the pin that is holding the crankshaft together and where the rod is rotating on is also worn.
> > The reason all this is happening is because a small piece of metal (ground up metal from the transmission most likely) has flowed into the oil passage and into these bearing cages where they chewed up the aluminum bearing cages not only on the rods but the two center bearings too.  And that one rod you thought was doing well, it most likely has ware on its bearing cage too.
> > So, if pulling the crank shaft apart to put half of another side of a crank shaft to it is the goal, there are many reasons it will not work.
> > Just my experience…
> > Bill
> > From:
> > anzhonda600owners@yahoogroups.com
> > [
> > mailto:anzhonda600owners@yahoogroups.com
> > ]
> > Sent:
> > Tuesday, April 30, 2019 5:26 PM
> > To:
> > anzhonda600owners@yahoogroups.com
> > Subject:
> > [anzhonda600owners] Anyone know how to press the crankshaft apart?
> > I am trying to figure out how to un-press the crankshaft (have a sacrificial crank to practice on). So if you have seen this done I can use whatever hints or instructions you can provide.
> > Also, anyone have the number on the bearings?
> > Thanks,
> > Richard