A10 steering cone removal

[topher]

Morning folks. As per the title I'm wondering how the upper/lower cones can be removed from the headstock to go ahead with a taper roller bearing conversion. I don't have access to welding equipment or a lathe so need some suggestions please that don't involve welding a bar acrosss the face of the cone to drift it out or turning a threaded bar to screw into the cone. Unless someone has the right tool to sell or lend  Its a 1950 A10 plunger. Thanks.

[neil1964]

You mean the cone sitting at bottom of yoke?
Soak in penetrating fluid overnight.
Shock it a couple of times with copper mallet.
Then use a couple of tyre levers to prise it up.
Once I left the cone on to protect the seating area when I had yokes stove enamelled and had to get a cutting disc to weaken it before splitting with a cold chisel.
Hopefully you will not need to do that.

[DAVE BRADY]

Hi,

I had great difficulty with this job.  There was no lip to hit against.  I tried cutting in to the cup to make it weaker but not enough can be cut without going in to the head stock.  Eventually I used a small cutting wheel in a Dremel to create a small recess in the cup enough to able to use an old screwdriver as a drift. Two good whacks and it came out.

Dave.

[topher]

You mean the cone sitting at bottom of yoke?

No.45 in the pic, top and bottom ones that sit in the frame/headstock. Thanks.

[topher]

Hi,

I had great difficulty with this job.  There was no lip to hit against.  I tried cutting in to the cup to make it weaker but not enough can be cut without going in to the head stock.  Eventually I used a small cutting wheel in a Dremel to create a small recess in the cup enough to able to use an old screwdriver as a drift. Two good whacks and it came out.

Dave.

Sounds like a plan, I'd thought along similar lines. Yes, a bitch of a job. Hate the way websites selling the bearings tell you it's a simple job, fit and ride  Thanks.

[DAVE BRADY]

Hi,

The 'fit' is quite easy it is the other part they forget to mention.  You will probably never do this again on this frame so take great joy in the satisfaction of the completed job.

Dave.

[topher]

Sorry to reanimate a slightly old thread but due to life getting in the way of things this is still an on-going process. And it is my thread anyway.....

So today's question relates to this part of the installation instructions;
"rigid and plunger models will have to have the inner corner edge of the frame relieved where the steering stem passes through the area where the outer race cup sits in the frame"
Is this best done before or after the bearing cups are fitted? Thanks in advance.

[EDDIE SIMPSON]

fit the outer cups  all the way home, then see how much of the inside of the steering head casting has to be relieved for the races to make contact with the bearing outer with suitable  clearance. when happy fit inners to yokes.
you probably will need a dremel.

[V500]

Hi,

I had great difficulty with this job.  There was no lip to hit against.  I tried cutting in to the cup to make it weaker but not enough can be cut without going in to the head stock.  Eventually I used a small cutting wheel in a Dremel to create a small recess in the cup enough to able to use an old screwdriver as a drift. Two good whacks and it came out.

Dave.

Sounds like a plan, I'd thought along similar lines. Yes, a bitch of a job. Hate the way websites selling the bearings tell you it's a simple job, fit and ride  Thanks.

Normally a sharp drift will catch the edge of the bearing outer to allow it's removal, but if all else fails run a bead of weld around the track surface and it'll fall out when it cools.

[DAVE BRADY]

Hi,

There was no lip whatsoever and it would have been an overhead weld so the Dremel option worked best for me.

Dave.

[topher]

fit the outer cups  all the way home, then see how much of the inside of the steering head casting has to be relieved for the races to make contact with the bearing outer with suitable  clearance. when happy fit inners to yokes.
you probably will need a dremel.

Appreciate the advice 👍