Author Topic: 1930 350cc Douglas clutch problem  (Read 196 times)

0 Members and 1 Guest are viewing this topic.

Offline douglas1947

  • Senior Member
  • ***
  • Join Date: Feb 2014
  • Posts: 354
  • Location: Germany
1930 350cc Douglas clutch problem
« on: 28 Apr 2020 at 10:52 »
Hi all,

Im just finishing my H3 project but have a problem with the clutch.

I have fitted the flywheel/clutch after regrinding the overhault crank cone with the old clutch plate (was 3,3mm lining, so not so much left).
The clutch had no good contact to the backplate, because there was not enough space at the bearing of the operating lever. So I dicided to renew the lining with new 5mm lining. Unfortunately this 1.7mm thicker lining was not enough to get more space at the operating bearing. I will need a small space to get the bearing disengaged to a nd full pressure of the lining to the back plate.
Has anyone an idea for help?

Michael

Offline douglas1947

  • Senior Member
  • ***
  • Join Date: Feb 2014
  • Posts: 354
  • Location: Germany
Re: 1930 350cc Douglas clutch problem
« Reply #1 on: 28 Apr 2020 at 10:59 »
I add a photo of the flywheel (with the old 3.3mm friction plate, it is only single sided).

Michael

Offline douglas1947

  • Senior Member
  • ***
  • Join Date: Feb 2014
  • Posts: 354
  • Location: Germany
Re: 1930 350cc Douglas clutch problem
« Reply #2 on: 29 Apr 2020 at 11:45 »
I have thought about the  missing clearence (free movement) and have made some tests in the morning.

I have fitted the bronce ring (77,0 x 60,6 x 4mm)  with out balls  + shims and later with smaller balls. With 7/32"  (5,56mm) there is some clearence (8mm from operating roller to end of the cam slot).
So I will try to make a new bronce /brass retaining ring for smaller balls I will try with 6mm.
May be someone has an other idea?

Michael