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Crankshaft wobble
#21
(18-03-2018, 10:32 PM)Tony Press Wrote: This is always critical  if the front angular contact bearings are the special narrow outer ring pair which must be mounted back to back.

An ordinary pair can be mounted either back to back or face to face.

The housing depth must be always checked in later crankcases to ensure the correct pair of bearings are fitted.

Cheers, Tony.

The "Companion" says they should be mounted so that the thicker outer rings are together  - which is, I take it "back to back".

This is irrespective of the housing depth or the width of the outer rings.   In regards to those I have the correct width bearings for the housing in the engine I have.

There is no preload on the bearings which is due, I take it, to wear.   So I will introduce a 2.5 thou  shim to add a bit of preload, which most people seem to think is a good idea.

Other sources say they should be installed with the faces marked "Thrust" together.   The set that came out of the engine had "Thrust" on the inner rings, which was on the opposite side to the thicker part of the outer rings.

Which means, I think, that someone has already had these bearings out, and turned the middles round to get some more wear out of them.

So I am using another set that I don't think have been used as much.   They are not marked "Thrust", so that confusion doesn't arise.    Still need the preload, though, so either they are not a matched pair, or are a bit worn.

I am sure when re-assembled I will still have the "wobble".

Or maybe I will buy a Big Seven, then life will be so much easier!

Cheers

Simon
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Messages In This Thread
Crankshaft wobble - by "Slack Alice" Simon - 15-03-2018, 11:57 AM
RE: Crankshaft wobble - by Chris KC - 15-03-2018, 07:36 PM
RE: Crankshaft wobble - by Bob Culver - 15-03-2018, 11:47 PM
RE: Crankshaft wobble - by "Slack Alice" Simon - 16-03-2018, 08:22 AM
RE: Crankshaft wobble - by Chris KC - 16-03-2018, 08:48 AM
RE: Crankshaft wobble - by Bob Culver - 16-03-2018, 09:17 AM
RE: Crankshaft wobble - by Hedd_Jones - 16-03-2018, 09:22 AM
RE: Crankshaft wobble - by "Slack Alice" Simon - 16-03-2018, 10:16 AM
RE: Crankshaft wobble - by Chris KC - 16-03-2018, 10:19 AM
RE: Crankshaft wobble - by Robert Leigh - 16-03-2018, 11:21 AM
RE: Crankshaft wobble - by Rogerfrench - 16-03-2018, 04:12 PM
RE: Crankshaft wobble - by Chris KC - 17-03-2018, 08:57 AM
RE: Crankshaft wobble - by Bob Culver - 16-03-2018, 04:24 PM
RE: Crankshaft wobble - by John Mason - 16-03-2018, 04:55 PM
RE: Crankshaft wobble - by "Slack Alice" Simon - 16-03-2018, 07:28 PM
RE: Crankshaft wobble - by Bob Culver - 16-03-2018, 09:10 PM
RE: Crankshaft wobble - by Hedd Jones - 16-03-2018, 11:26 PM
RE: Crankshaft wobble - by John Mason - 17-03-2018, 10:58 AM
RE: Crankshaft wobble - by Ian Dunford - 18-03-2018, 02:19 PM
RE: Crankshaft wobble - by Tony Press - 18-03-2018, 10:32 PM
RE: Crankshaft wobble - by "Slack Alice" Simon - 18-03-2018, 10:53 PM
RE: Crankshaft wobble - by Tony Press - 18-03-2018, 11:40 PM
RE: Crankshaft wobble - by "Slack Alice" Simon - 19-03-2018, 08:11 AM
RE: Crankshaft wobble - by Ruairidh Dunford - 19-03-2018, 09:21 AM
RE: Crankshaft wobble - by "Slack Alice" Simon - 19-03-2018, 09:23 AM
RE: Crankshaft wobble - by Tony Press - 19-03-2018, 10:27 AM
RE: Crankshaft wobble - by Zetomagneto - 21-04-2018, 09:40 PM
RE: Crankshaft wobble - by Tony Press - 22-04-2018, 11:09 PM
RE: Crankshaft wobble - by Bob Culver - 22-04-2018, 08:55 PM
RE: Crankshaft wobble - by "Slack Alice" Simon - 23-04-2018, 05:24 PM
RE: Crankshaft wobble - by Tony Press - 23-04-2018, 11:18 PM

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