• Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

Rear Sprocket Spins, Wheel Stays Put

engineerk9 said:
What about the spacer in the cush-drive hub?
Click to expand...

To be pedantic, there are 2.
The outer is the C-clip (spring-steel) sitting on top of the outer bearing/ outer race...the other one is a small alum washer sitting between the two inner races to space them
out the same as the outer races are spaced by the C-clip.
The C-clip is FRACTIONALLY thinner than the factory-alum washer/ spacer .....the difference is easily made up by the tolerance/ slop in the bearings.
I prefer alum for those spacers/ spacer tubes as the softer material allows some "give/ yield" to get the tools to bite, rather than everything being S/S
making things hard to impossible for a backyarder's fix/ on-road fix, requiring pro tools and equipment ....each to their own, as always.
 
engineerk9 said:
The spacer tube is under compression load from the tension in the axle
Click to expand...


:) It's single right for existence.

mag00 said:
How many bearings in the rear wheel assembly? How are each of those bearings held in proximity?

It is a bit deceiving , it takes a close examination/study to see how it really is arranged and works.
Click to expand...


Just like on any other bike....all the spacers, tubes + inner races are near flush to each other creating a continuous sleeve for the axle to sit in.
The rear hub has 2 bearings #6203, the sprocket carrier has two bearing #6204.
As for a detailed "stacking" of parts, check tables / drawings 42 and 43 in the parts manual.
(Strada/ Terra resp.)
 
The 6203 has an ID of 17mm and the 6204 has an ID of 20mm.

The axle shaft is straight, no steps.
 
This is the perfect time for those who wish to check their bearings to go in and help the discussion.

I have had mine apart and resolved (sortof resolved) the issue, for me to pull my bike apart to take pictures is just extra work. But for those who have not, this is a good time to check your bearings before your hub disintegrates.

While you are in there, take pictures of the spacers, bushings bearings etc. Try and figure how the forces are distributed along the axle in a continuous manner. Clean, measure inspect and report back.

If this were not a problem, there would not be so many failures. <----remember this
 
mag00 said:
While you are in there, take pictures of the spacers, bushings bearings etc. Try and figure how the forces are distributed along the axle in a continuous manner. Clean, measure inspect and report back.
Click to expand...

When I looked at the totally disintegrated bearings on my wife's Terra and the well-on-its-way-to-failing ones on my own it looked like the main issue was with the outer bearing of the sprocket carrier. And based on the amount of rust and grit I found in there it looked like the main culprit was lack of lubrication and ineffective seals.

There is indeed a bushing across the 2 sprocket carrier bearings that accounts for the 20mm to 17mm difference btw.
 
duibhceK said:
When I looked at the totally disintegrated bearings on my wife's Terra and the well-on-its-way-to-failing ones on my own it looked like the main issue was with the outer bearing of the sprocket carrier. And based on the amount of rust and grit I found in there it looked like the main culprit was lack of lubrication and ineffective seals.

There is indeed a bushing across the 2 sprocket carrier bearings that accounts for the 20mm to 17mm difference btw.
Click to expand...

Yes, indeedee doo. And there should also be a spacer between the bearings. That was the missing part I was looking for. That is why mine did not make sense. And looking at the parts list, I missed that spacer until just now. Could explain alot.
 
mag00 said:
Yes, indeedee doo. And there should also be a spacer between the bearings. That was the missing part I was looking for. That is why mine did not make sense. And looking at the parts list, I missed that spacer until just now. Could explain alot.
Click to expand...

Certainly could ??
In the Cush hub, one bearing is located in the hub by the shoulder & the circlip, the other bearing can "float" in the hub (although a tight fit it can still "adjust" itself), the axle & spacers locate it axially, via the bearing inner races
Chain/sprocket alignment is therefore via the Hub "secured" outer race & the inner race & spacers on the axle
I much prefer steel/steel spacers on the axle
 
And there should also be a spacer between the bearings.
Click to expand...
I was quoted 6 weeks + delivery so I made my own out of a washer using a grinder and a oil stone. Held it with an old speaker magnet.
Dimensions (measured off OEM spacer which did turn up eventually): OD 28mm. ID 20.5mm. W : between 2.42mm and 2.45 (measurement varies as it appears to stamped out of a sheet - not machined).
 
Johnn said:
I was quoted 6 weeks + delivery so I made my own out of a washer using a grinder and a oil stone. Held it with an old speaker magnet.
Dimensions (measured off OEM spacer which did turn up eventually): OD 28mm. ID 20.5mm. W : between 2.42mm and 2.45 (measurement varies as it appears to stamped out of a sheet - not machined).
Click to expand...

It needs to be a close tolerance fit on the axle, otherwise it may damage the bearing seals

I removed both inner seals & filled the space with high quality water resistant grease
 
It needs to be a close tolerance fit on the axle, otherwise it may damage the bearing seals
Click to expand...

Agree. I reduced a 30mm washer by spinning it on a drill against a bench grinder to the diameter smaller than the diameter of the seals. That was easy compared to gauging the thickness from the mangled and hammered spacer ( the collapsed bearings had hammered/ground the thickness to below 2mm) then reducing the thickness of the washer from 3mm.
The spacer was simply not available from Husqvarna Australia, Bills or Huskyparts and I could not confidently match a BMW equivalent.
 
Johnn said:
The spacer was simply not available from Husqvarna Australia, Bills or Huskyparts and I could not confidently match a BMW equivalent.
Click to expand...

Pretty sure this is exactly the same part. Same wheel. Same cush drive hub. Same axle. Correct me if I'm wrong.
 
mag00 said:
Yes, indeedee doo. And there should also be a spacer between the bearings. That was the missing part I was looking for. That is why mine did not make sense. And looking at the parts list, I missed that spacer until just now. Could explain alot.
Click to expand...

Part #25 in the parts manual
 
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