Saving a 1935 Scout case half

[Dusty-Dave]

This 1935 Sport Scout lh case had most all of the threads for the main race retaining nut broken off. I welded and machined one of these once! Never again everything moves and warps when you start in that area. So a new technique.
I turned all the threads off then turned the od to accept a sleeve

I made a sleeve but left enough on the end to thread 2" 16 left hand

Then I made some male 2" 16 left handed threads and parted a nuts worth off with my hightech parting tool.

Then using the threaded sleeve as a fixture I bored the nut to size and cut the left handed thread that acts as an oil seal in this engine.

Then I heated the sleeve to 950 degrees f and slid it into place let it cool and torqued and staked the nut.

Other than the fact it will rust I suspect way better than original and its all straight
Dusty

[TheWhiteDevil]

So awesome to see these old cases saved with some solid craftsmanship

[Kgi4x4]

Yes! Always love the knowledge you share!

[Dusty-Dave]

Dam I just noticed that lots of the broken stuff under the table showed in the last pic. I was kinda feeling like I was making a little progress until I saw that.
Dusty

[Fatkat]

Awesome work Dave

[Madrivermoco]

I want a ‘35 sport scout mountain bike. I know a Chief is easier to find parts for and the 101 is a better bike (and Chout candidate) and the 41 has the skirts but damn...

That 35 rules

[Dusty-Dave]

I want a ‘35 sport scout mountain bike. I know a Chief is easier to find parts for and the 101 is a better bike (and Chout candidate) and the 41 has the skirts but damn...

That 35 rules

Ya oughta start collecting parts, I built this one almost completely out of ebay and swap meet parts. https://photos.app.goo.gl/XHx4DZtkDZGyLdMk8 Don't know for sure but have less than two grand in it. The only really expensive part was the T&O flywheels. Using the 741 cylinders & heads saved a small fortune and the vertical twin frame saved another small fortune.
Dusty

[Bombay]

That is pretty bad ass. good work.

[Dusty-Dave]

The other case half I'm going to use with the 35 left side is probably 39 or later if the pushrod guides are original to it. It had a tiny crack .



Then I discovered that the pinion race bore is well machined just to an odd size that isn't available now if it ever was. So I started making a pinion race with a .0075 oversize OD.
This drill bit in rockwell 45 shaft is all the little Atlas Craftsman wanted even in back gear.

Dusty

[Dusty-Dave]

Forgot to get a shot of boring to size and parting. Boiled the case for 3 or 4 minutes and the race drove in at a medium hammer fit.

Dusty

[Dusty-Dave]

A little better picture.

Dusty

[Bombay]

You boiled the cases in water to get the race in? Thats something new. it makes sense.. Just never heard of it before .

[Dusty-Dave]

Straight out of the WW2 Indian Overhaul manual. A lo tech way of getting about 212 degrees fahrenheit. Bout 209 at my altitude.
Dusty