Puppeteer

Author Topic: SR2 starter replacement  (Read 2755 times)

KC7NOA

  • Jr. Member
  • **
  • Posts: 74
    • View Profile
Re: SR2 starter replacement
« Reply #120 on: May 11, 2022, 04:10:34 AM »
I'm past the sprocket and sheave, ... bought a replacement sheave.

I'm trying to find a replacement for the nut ... maybe a 1-3/8 18 ... took it to a generator shop in town ... they said they didn't have one to replace it.

cobbadog

  • Hero Member
  • *****
  • Posts: 746
    • View Profile
Re: SR2 starter replacement
« Reply #121 on: May 11, 2022, 12:12:43 PM »
Try the local bearing shop as it is part of a bearing adjuster. Or have a look online at some nut and bolt shops, you never know what will turn up.
Coopernook - the centre of our Universe.

KC7NOA

  • Jr. Member
  • **
  • Posts: 74
    • View Profile
Re: SR2 starter replacement
« Reply #122 on: May 12, 2022, 10:28:19 AM »
Sandblasted


KC7NOA

  • Jr. Member
  • **
  • Posts: 74
    • View Profile
Re: SR2 starter replacement
« Reply #123 on: May 13, 2022, 06:57:28 PM »
Looks like I'm ready to freeze the shaft and bake the bearing to get a slip on install of the bearing


cobbadog

  • Hero Member
  • *****
  • Posts: 746
    • View Profile
Re: SR2 starter replacement
« Reply #124 on: May 14, 2022, 12:10:42 PM »
What way are you intending to freeze the shaft and warm the bearing? On a small shaft I was able to put it in a plastic bag and hid it in the freezer inside overnight. Never got caught either. Then when it was time I was able to get enough heat from a heat gun for stripping paint. You don't need a huge variance but enough to do the job.
Coopernook - the centre of our Universe.

KC7NOA

  • Jr. Member
  • **
  • Posts: 74
    • View Profile
Re: SR2 starter replacement
« Reply #125 on: May 14, 2022, 08:58:58 PM »
My other knew what I was going to put in the deep freeze ...

Shaft hit 20deg and bearing was heated to 200 degrees in a shallow oil bath ... for a 180deg differential

Slid right on ... I even put the lock tab and nut quickly and tightened



« Last Edit: May 14, 2022, 09:00:56 PM by KC7NOA »

cobbadog

  • Hero Member
  • *****
  • Posts: 746
    • View Profile
Re: SR2 starter replacement
« Reply #126 on: May 15, 2022, 11:45:11 AM »
Very well done, looking better all the time.
Coopernook - the centre of our Universe.

Hugh Conway

  • Sr. Member
  • ****
  • Posts: 492
    • View Profile
Re: SR2 starter replacement
« Reply #127 on: May 15, 2022, 06:16:20 PM »
Re: cooling/heating to remove bearing from shaft.
In commercial aviation, we sometimes encountered a wheel bearing stuck on an axel (think big, like 747)
The solution was to pack the axel in dry ice, the bearing remained at ambient temp. the bearing usually just slid off.
Dry ice is not that difficult to come by, locally, it's used for packing fish for transport via courier (sport fishermen)
Cheers
Hugh
JKson 6/1  (Utterpower PMG ) Off-grid
Lister 6/1 Start-O-Matic engine......running with PMG
1978 Royal Enfield (glutton for punishment by Indian iron)
1963 BMW R-27 project

cobbadog

  • Hero Member
  • *****
  • Posts: 746
    • View Profile
Re: SR2 starter replacement
« Reply #128 on: May 16, 2022, 11:57:06 AM »
Good thinking Hugh. Our Club used a lot of dry ice to help shrink the cyliner liner in the Clubs big Tangye engine. Even then it was stubbourn but got it out in the end.
Coopernook - the centre of our Universe.

KC7NOA

  • Jr. Member
  • **
  • Posts: 74
    • View Profile
Re: SR2 starter replacement
« Reply #129 on: May 18, 2022, 04:17:01 PM »
I see why -- kinda -- why sprocket/sheave was installed backwards ...
Smarter to cut off the thin angle iron that holds the air cleaner

« Last Edit: May 18, 2022, 04:18:52 PM by KC7NOA »