Possibly my first screw up?

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Craig said:
Hard to see details in this photo , sorry
Click to expand...

Hopefully, RoadScholar won't mind me copying part of his photo. Compare with the images in Norcoastal's first post.
Possibly my first screw up?
 
Thanks Les ! much more definitive , you spend a lot of your time providing us old fools direction , and I for one appreciate it , a lot
 
L.A.B. said:
Hopefully, RoadScholar won't mind me copying part of his photo. Compare with the images in Norcoastal's first post.
Click to expand...

Thanks for the acknowledgement, you are welcome to any of the material in my posts, goes for any member as well. But, beware, I haven't made all the mistakes yet; still working on it though...

Best
 
comnoz said:
The case did not come with a bushing there and I don't think there is a bushing in your case. The ring you see is just a wear mark.
But now that it has had a chisel taken to it it will need to be bored oversize and a bushing will need to be installed.
Click to expand...
Well, it wasn’t actually a chisel. It was more like a screw driver and a small ball pein hammer. I think the shaft is ok for a shaft to be inserted to.
 
comnoz said:
The case did not come with a bushing there and I don't think there is a bushing in your case. The ring you see is just a wear mark.
But now that it has had a chisel taken to it it will need to be bored oversize and a bushing will need to be installed.
Click to expand...

As Jim says.

If you zoom in on your second picture posted back in the first post, you can see that the machining marks all match, you can even see small porosity on the areas of the wear mark that matches the porosity elsewhere.

The lesson here to the OP is to stop and post questions here BEFORE taking a chisel to things!

Fortunately you have not destroyed the cases. But you have created yourself another job, another delay, and another $ bill to undo this.
 
So if this is a part of the case, then all I really did as score the walls a little.

If this shaft is pressed in and isn’t a bearing for something that is moving, can’t I just install the new shaft into the space?

I mean what’s the bad thing if the walls are a little scuffed up, this is a stationary shaft?
 
gfc,0BN
Norcoastal said:
So if this is a part of the case, then all I really did as score the walls a little.

If this shaft is pressed in and isn’t a bearing for something that is moving, can’t I just install the new shaft into the space?

I mean what’s the bad thing if the walls are a little scuffed up, this is a stationary shaft?
Click to expand...

If the shaft is still a tight fit you are OK.
The shaft does not rotate in the case and there is no bushing available.
If the hole does not hold the shaft firmly then it will need to go to a machine shop that can make a custom bushing to repair the damage.
 
From these pics it looks like the bush on the intermediate gear left a witness mark/wear on the case that made the hole look like it was a bush but its still part of the case.

Shaft installed on pre 72 cases, note the lines worn on the area the intermediate gear runs up against.

Possibly my first screw up?


Same cases from the inside

Possibly my first screw up?


And a set of pics from 72 cases without the shaft installed. Again note the circular wear lines.

Possibly my first screw up?


Possibly my first screw up?


The Shaft measures just over .56" diameter.
 
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comnoz said:
gfc,0BN


If the shaft is still a tight fit you are OK.
The shaft does not rotate in the case and there is no bushing available.
If the hole does not hold the shaft firmly then it will need to go to a machine shop that can make a custom bushing to repair the damage.
Click to expand...

This is my hope. The shaft should be here in about a week. I think I’m ok
 
Carefully check the circlip grove as well. You do NOT want that coming out and being whipped around by the crank, cam, etc.
 
I think I’m ok. I didn’t hack it up to badly. There’s a gouge, but it’s small.

Under the guise of expecting severe ridicule, would a dash of JB Weld help here?
 
There are several points to be made here
Yes you screwed up we all do it from time to time
If it had been a bush in those cases you really shouldn't be trying to knock it out with a hammer and screwdriver
Use a proper punch/puller etc etc
Also did you have the cases hot at the time?
If you remove a bush from a case when it's cold you will wear out the housing
When you have this resolved and you are building the motor please use the correct tool or cutaway timing cover to support the pin when you tighten the camshaft nut
It will pay dividends to ask just about anything Norton twin on here first
Cheers
 
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I guess that due to hamfisted owners not willing to read a manual or apply some logic to the work, more engines get destroyed than running them on redline for hours.
Even if you heat your cases you will not be able to insert the new pin without some help of your favourite tool...
 
Norcoastal said:
Appreciate the vote of confidence and you’re probably 100% correct t.

I want to learn and the best way to do that is to do it. I may have to buy a bearing press. I’ve needed one for a while and this may be the reason to get one.

I mean, how hard can it be to remove a bearing and replace it with a new one?
Click to expand...

Sorry. Didn't mean to be so unsupportive. I learned how to do some difficult tasks on my bike by ruining parts.
 
The person who hasn’t made any mistakes hasn’t tried anything new . As a very low ranking self taught machinist wannabee I can attest to a few truisms .
If the making of a component requires a number of successive operations you will always screw it up on the last operation.
Get a belt driven lathe if you are a beginner- you will run the tooling into the chuck - probably more than once .
The spinning jaws of the chuck hurt your knuckles.

Like many , I eventually learn from my mistakes- emphasis on “eventually “....
 
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