MOT Advisory notice, rear wheel, bearing?

[KMD]

Took my 1150gs for MOT today and although it passed an Advisory Notice was issued for play at the rear wheel.

Back home on the drive I've checked it myself and there is a very noticeable but not extreme movement of the wheel which I am far from happy about. Rotating the wheel by hand does not produce any rumbling, graunching or grinding that I'm able to feel or hear, but with hands at 9 and 3 or 6 and 12 it is possible to 'rock' the wheel slightly.

I've read the posts here and on Advrider courtesy of Steptoe and feel confident I could carry out a repair myself, but would be interested to hear views on the 'play' ie does it indicate a bearing due to fail? (2000 model with just over 30,000 miles and nothing in the documentation to indicate a previous bearing change).

My first job is going to be to drain the oil from the final drive and have a sift through that.

 

[Steptoe]

95% certain it's the paralever bearing. No need for oil drain etc etc.
Just try adjust it before replacing it.

If there's only a small amount of play, and it hasn't been there for long thats all you need to do.

 

[Deleted account W]

Just as a matter of interest, what size socket and what size Allen key are needed? I need to buy both

 

[Colban]

12mm allen key,36mm socket.

 

[Keith Chapman]

I would use a 30mm socket, a 36mm would slip a bit

 

[KMD]

Thanks for the help guys. I've done the paralever pre-load and it doesn't affect it, even if it's slightly 'over-tight' .

Drained the oil and it had the usual amount of gumf on the magnet but nothing spectacular and no filings floating around in the fluid. The large bearing appears in good condition, no rivets missing and no 'pockets' when rotated by hand but the tapered roller bearing does seem to have more than what I would have expected in the way of play, but is also in good condition.

So I'm wondering now......... Is it possible the tapered roller has worn and needs replacing, or maybe worn to the point the shims are no longer applying the correct pre-load and allowing movement? Would re-shimming be the way to go or should it now be left, monitored, and allowed to develop ?

I have a Picos trip coming up and want it to be right.

 

[MikeP]

Thanks for the help guys. I've done the paralever pre-load and it doesn't affect it, even if it's slightly 'over-tight' .

If you have adjusted 7 & 8 here....(the ones nearest the gaiter)

and there is still play top, bottom and side to side, then you may need to replace 2 here...

(two of them).

 

[KMD]

Mike, Thanks very much for going to the trouble with that, really appreciate it.

 

[Rob Farmer]

The bearings usually have grooves in them if they have been ridden with any play in them. A pair of new ones will set you back the best part of £30. Just fit new ones and be done with it

 

[Colban]

I would use a 30mm socket, a 36mm would slip a bit

Oops.
I suppose the explanation that i prefer a sloppy fit wouldn't help at all.

 

[Steptoe]

Thanks for the help guys. I've done the paralever pre-load and it doesn't affect it, even if it's slightly 'over-tight' .

but the tapered roller bearing does seem to have more than what I would have expected in the way of play, but is also in good condition.

So I'm wondering now......... Is it possible the tapered roller has worn and needs replacing, or maybe worn to the point the shims are no longer applying the correct pre-load and allowing movement? Would re-shimming be the way to go or should it now be left, monitored, and allowed to develop ?

.

It's no good trying to adjust the pre-load "as per the book" on bearings that have been in situ for a while. The adjusting pin is covered in locktight for a start. Just tighten them up until the play had gone. Your fannying around too much .

The tapered roller bearing has a lot of play when it's just loose and not in it's shell. DO NOT TRY SHIMMING IT JUST BECAUSE YOU THINK IT MAY HELP . You'll feck it big time .

Just tighten the paralever bearing until all the play has gone. Or being as you sound as if your not too sure about things Do as Rob said. Just fit new paralever bearings.