« previous next »
Pages: [1]   Go Down

Author Topic: Semi unit crankshaft oil seal  (Read 414 times)

Offline manxman

  • A's Good Friend
  • ***
  • Join Date: Jul 2017
  • Posts: 68
  • Karma: 1
Semi unit crankshaft oil seal
« on: 29.12. 2019 14:37 »
Is the 67-0674 oil seal correct for 1951-1953  A10  semi unit plunger motors ?.  My parts book list no seal !!
Logged

Offline DJinCA

  • Moving Up
  • **
  • Join Date: Feb 2019
  • Posts: 37
  • Karma: 0
Re: Semi unit crankshaft oil seal
« Reply #1 on: 29.12. 2019 15:13 »
As wiser men have told me, the early plunger A10s didn't have seal here, just an oil slinger listed in the parts book as:
67-349 Bearing Shim

I received help on this very subject in a thread titled Plunger A10 assembly

https://www.a7a10.net/forum/index.php?topic=14290.msg118644#msg118644

There was a recommendation to machine the case to accept a seal if it was torn down.  Good advice, but due to circimstances I wasn't able to take advantage of it.  I hope that this is helpful.  Someone more knowledgeable than I will probably be able to offer more.

DJinCA
Logged

Offline AdrianJ

  • A's Good Friend
  • ***
  • Join Date: Oct 2018
  • Posts: 215
  • Karma: 3
Re: Semi unit crankshaft oil seal
« Reply #2 on: 29.12. 2019 15:56 »
Yes it fooled me. Mine is a 53 A10 but it has an oil seal where I wasn’t expecting it. Apparently the model year changed around September/October and mine has a later engine. Numbers are correct though.
Logged
'53 Plunger Flash and Steib S500, ‘66 LE Velocette, ‘53? Winged Wheel

Online morris

  • Wise & Enlightened
  • *
  • Join Date: Aug 2012
  • Posts: 1767
  • Karma: 27
  • Antwerp, Belgium
Re: Semi unit crankshaft oil seal
« Reply #3 on: 29.12. 2019 16:29 »
SKF CR20x35x7 will fit perfectly
Logged
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
The world looks better from a motorbike
Belgium
Pages: [1]   Go Up
« previous next »