Lancia Motor Club Forum Banner
04 June, 2020, 04:54:41 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Need to contact the Forum Administrator? e-mail forum.admin@lanciamc.co.uk, for Database Administrator e-mail database.admin@lanciamc.co.uk      -      Copy deadline for Viva Lancia is 12th of each month.      -      For Events e-mail events@lanciamc.co.uk      -      To Join the club go to http://www.lanciamc.co.uk/join.htm
 
   Home   Help Search Calendar Register  
Pages: 1 [2]   Go Down
  Print  
Author Topic: Flying steel balls!  (Read 695 times)
0 Members and 1 Guest are viewing this topic.
frankxhv773t
Permanent resident
**
Posts: 1674



« Reply #15 on: 20 April, 2020, 10:08:40 AM »

Could it be that the (apparently) alien "O" ring has prevented sufficient oil reaching this part or do things not work like that?
Logged
chriswgawne
Permanent resident
**
Posts: 1589



« Reply #16 on: 20 April, 2020, 10:48:54 AM »

I have been thinking about your problem overnight and I don't think its possible to over tighten the mainshaft  as you suggest Torstein,
The bearings have steps on the outside of their outer race which are used to locate them very firmly in their correct position in the outer case using long steel stepped pins and retaining fittings which fit snugly into the slots. And there are tab washers to hold the 'end' nuts or whatever in place. So the opportunity to either overtighten or self tighten with use is very limited.
It sounds to me as if someone has re-assembled your transaxle incorrectly. I suggest you visually inspect everything very carefully including the bearings and double check everything is there before ordering any spare parts just yet. Depending upon what you find, you can then make the correct decision as to what is the best solution,,,,,as in rebuild with new or missing  components , replacement etc etc comparing the attendant costs.
I am not trying to be pessimistic but as I am sure you realise, one doesn't want to have ongoing transaxle problems if only for the reason that its a bit of a pain to remove them from the car even with a vehicle lift. They are heavy,  awkward to handle and of course the brakes have to be removed each time you do a stripdown.
I will send you a pm.
Chris
Logged

Chris Gawne
Mobile: 07778 216552
impaw
Member
***
Posts: 43


WWW
« Reply #17 on: 20 April, 2020, 11:14:11 AM »

Thank you for your advice Chris!

Yes, I agree, someone in the past has re-assembled this transaxe incorrectly somehow.
I am having a visit from a very technically gifted man ( my dad )  later, it will be interesting to see if he has any input.

The transaxle is going to be totally taken apart, that is now a must Smiley
Logged

Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
Brian Long
Member
****
Posts: 74


« Reply #18 on: 22 April, 2020, 05:28:23 AM »

The o-ring is a modification/replacement for a felt seal that stopped oil travelling between the inside surface of the sleeve and the shaft it sits on. If omitted, as was often the case, oil would find its way out onto the clutch surface. The o-ring sits between the face of the sleeve and the gear that it butts up against. Ideally the sleeve should have been machined to accomodate the o-ring
Furthermore, there is a another felt plug in the nose of the input shaft which is fed by the Archimedes screw/spiral inside the shaft. This arrangement was designed to allow a little lubrication of the spigot bearing which, in those days, was not sealed. With a modern sealed spigot bearing this feature is not required and the nose of the input shaft should be sealed with e.g. an aluminium plug.
Cheers
Brian
Logged
impaw
Member
***
Posts: 43


WWW
« Reply #19 on: 22 April, 2020, 05:58:37 AM »

Thank you Brian!
Reading an old thread on the issue, I was thinking this was the case.
Great to have it confirmed.
There is a machined groove inside of the sleeve.

I have a sealed bearing, so I will seal the shaft, as suggested.

Thank again!
Logged

Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
GG
Megaposter
*
Posts: 409


B20 s.2, Appia C10 unrestored


WWW
« Reply #20 on: 22 April, 2020, 12:08:48 PM »

The o-ring is a modification/replacement for a felt seal that stopped oil travelling between the inside surface of the sleeve and the shaft it sits on. If omitted, as was often the case, oil would find its way out onto the clutch surface. The o-ring sits between the face of the sleeve and the gear that it butts up against. Ideally the sleeve should have been machined to accomodate the o-ring
Furthermore, there is a another felt plug in the nose of the input shaft which is fed by the Archimedes screw/spiral inside the shaft. This arrangement was designed to allow a little lubrication of the spigot bearing which, in those days, was not sealed. With a modern sealed spigot bearing this feature is not required and the nose of the input shaft should be sealed with e.g. an aluminium plug.
Cheers
Brian

Thanks for this Brian, right on the mark. My car had oil on the clutch disk from the missing felt plug (had been replaced with silicone, but failed), and also along the outside of the shaft as noted above. We machined a 45 chamfer in the end of the sleeve, and snuck the thin O-ring in there.


* IMG_6360 copy.jpg (435.2 KB, 2000x1500 - viewed 15 times.)

* IMG_6361 copy.jpg (541.45 KB, 1500x2000 - viewed 15 times.)
Logged

B20 s.2, Appia C10 unrestored
Dikappa
Megaposter
*
Posts: 355


« Reply #21 on: 22 April, 2020, 06:42:38 PM »

I did the same, and machined a tiny oil seal in the aluminium nose piece that surrounds the sleeve.  Furthermore I tapped a tread into the shaft end and plugged it.  I then used a sealed bearing instead of the original open one where the shaft sits in the clutch.  There is a tread about it somewhere.
Logged
impaw
Member
***
Posts: 43


WWW
« Reply #22 on: 22 April, 2020, 09:06:08 PM »

And heres another variation, with a groove machined inside the sleeve.


* 31CBC953-18BB-492A-A437-2EE4D71F6BA7.jpeg (1574.49 KB, 4032x3024 - viewed 14 times.)
Logged

Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
Pages: 1 [2]   Go Up
  Print  
 
Jump to:  

Contact the Forum Administrator

LMC Forum copyright © 2007 - 2018 Lancia Motor Club Ltd

Powered by SMF 1.1.20 | SMF © 2006-2011, Simple Machines
Page created in 0.047 seconds with 21 queries.