ms880 rim sprocket removal help needed

[Wonky]

I can think of many ways, but I don’t know what’s in your tool box. But I know what’s in mine.

 

i could knock up something like a the old 075\6 clutch tool or if you like something similar to a angle grinder tool to change the disks, but with longer bits to get onto the arms leading up to the clutch shoes, But as I would be making it I’d have 3 prongs.

another way would be shims on the clutch nut so you could get an adjustable spanner on the shims  as then nut is bigger Then by undoing the clutch it old push the bearing off.

  Or if you have  a bearing puller, use it then  get a spanner on the clutch.. but I don’t have one ?.

 

and rope/starter cord as a piston stop 

 

 

[spudulike]

It looks like either the bearing should be a push clearance fit in the crank but has stuck on or more likely, you should use a thin spanner on the clutch and undoing it will pop the bearing off as the clutch unscrews (clockwise - Left Hand Thread).

These sorts of jobs usually mean creating a tool for the job which may never be used again but that's life!

[orang-utan]

yeah, know what you mean spud although those narrow spanners are hard to come by ie not in me workshop!  I have a ring spanner that i think must have come with a bike a while back but of course its the wrong size would have been perfect as would slip over the bearing and onto the flats of the clutch nut.  Do you think that this bearing is a bit like a needle cage that you get on smaller saws and that fits freely onto the crank shaft?

 

the shims sounds like an idea so to extend the flat surfaces to get the adjustable on although i don't think using the bearing puller will work at this stage as there is nothing to get the jaws onto.

[Rough Hewn]

Need one of these?

[spudulike]

The bearing is a sealed ball race and would typically be an interference fit on to the shaft so unlikely to just slide off.

[orang-utan]

Just picking up where i left off with this one as had to use machine for grinding.  Thanks for your comments.  Yes, this tool that you have hold off looks like it might just cut the mustard (or get the damn bearing off more to the point!).  What is it called RH?  Easy to come by?

[Rough Hewn]

Pm me your address I'll send it to you.
Or they are about £17 on eBay.

[orang-utan]

I'm not sure that this will fit though.  Have you used it on an ms880 to be able to get off the bearing and then the clutch?  It looks like the central hole on this tool is going to be too large for the bearing and the flat spanner like bits are not going to be able to come close to the flat edges of the clutch nut.

  

[Rough Hewn]

I'm not sure that this will fit though.  Have you used it on an ms880 to be able to get off the bearing and then the clutch?  It looks like the central hole on this tool is going to be too large for the bearing and the flat spanner like bits are not going to be able to come close to the flat edges of the clutch nut.
  

I bought it for my stihl 051/075.
Not used it on the 880.
I couldn't get the clutch off with the special spanner either.
Used an air gun eventually.
[emoji51]
Have you tried a piston stop, a large spanner and a rubber mallet?
Rub a bit of diesel around the top of the bolt a few hours in advance.
[emoji106]