860GT rear wheel hub mystery piece

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rjk40
Parallel Twin
Posts: 143
Joined: Thu Dec 05, 2013 10:54 am
Location: Malabar, Florida

860GT rear wheel hub mystery piece

Post by rjk40 » Sun Dec 23, 2018 9:30 am

I know that I am likely missing a previous post, but have looked through the ones here, and do not see a match for my question:

Sitting in between the bearings in the wheel hub (not the sprocket hub...) is the piece shown in the link below:

https://www.flickr.com/photos/124760992 ... ed-public/

It is indicated in the Haynes manual, but I do not see it in my parts manual.
Its ends are a close fit to the sides of the bearings, but I do not see its purpose, except to cause either bearing to share side forces (????).
It had quite a bit of grease, but was not packed in it; likely offthrow from the bearings.(?)
Neither end of it shows any wear pattern, adding to the mystery.
Additionally, the ring around it at about 1/3 of the way from its closest end is a mystery to me, as to what it does.
I shall put it back after installing the first new bearing, but will be left with a question and no answer.

Craig? Bill? Anyone? Comments?

Again, thanks in advance.

Regards,
Richard

ducadini
750 Sport [BEVEL]
Posts: 248
Joined: Sat Jul 31, 2004 9:54 am
Location: Antwerpen

Re: 860GT rear wheel hub mystery piece

Post by ducadini » Sun Dec 23, 2018 10:32 am

Just a distancepiece between the bearings.
Grease to keep it relative in place, as is the ring.

ciao
ducadini
Nego i ricordi peggiori
Richiamo i migliori pensieri

rjk40
Parallel Twin
Posts: 143
Joined: Thu Dec 05, 2013 10:54 am
Location: Malabar, Florida

Re: 860GT rear wheel hub mystery piece

Post by rjk40 » Sun Dec 23, 2018 11:30 am

Hi Duca,

I'm sorry, but I do not understand your explanation as to the grease and the ring.
Can you please clarify for this old man?
Thanks in advance.
Regards,
Richard

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81mhr900ss
Mach 3
Posts: 82
Joined: Tue May 31, 2016 3:49 pm

Re: 860GT rear wheel hub mystery piece

Post by 81mhr900ss » Sun Dec 23, 2018 6:48 pm

Hi Richard: the Haynes Manual diagram calls it a "distance piece" and on page 117 of the Haynes manual it is clearly shown in fig 9:2d, where it is called "spacer". It's simply a spacer between the bearings.

The spares drawing on line call it "BUSH 17,3X25,0X34,6, PART NR 079580480" (https://www.ducaticlassics.com/parts/86 ... all/wheels). The picture of the bushing does not show the ring.

I think the other post just means when putting it back together make sure it's greased to lube it in service and to stop it falling out when reassembling.

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