New Freehub & cassette?

[nmfeb70]

Hi all, the rear cassette on my MTB is spinning freely when I turn the pedals. Is this the case of a new freehub/cassette. For some reason I can't upload a video. Thanks.

 

[lazybloke]

Did you forget to include something?

 

[nmfeb70]

Did you forget to include something?

???

 

[figbat]

You might be able to disassemble the freehub and see if it’s just sticky pawls that can be cleaned and lubricated. Depends on what hub it is.

 

[lazybloke]

???

I couldn't see half your post earlier, it makes sense now.

As @figbat said, sounds like pawls are the issue. Personally I find those things are fit, forget, replac, as a whole unit. No maintenance!

I did (as a kid) look inside a freewheel; the pawl-springs acquired escape velocity and a million miniscule ball bearings fell out and rolled under the fridge. It all went in the bin.

 

[figbat]

A Shimano hub is one kettle of fish, but my Superstar one just pulls apart with no “KABOING!” and the pawls are easy to remove, clean and replace. Need more info.

 

[midlife]

I guess the first think to work out is it an old style freewheel or a freehub with cassette?

 

[nmfeb70]

I guess the first think to work out is it an old style freewheel or a freehub with cassette?

I guess the first think to work out is it an old style freewheel or a freehub with cassette?

It's a freehub with cassette. How I wish it was a simple freewheel!

 

[boydj]

Take the wheel out, take the cassette off, lay it in its side and dribble GT85 or similar into both side of the hub then spin it around for a while. That may soften the grease enough to get the freewheel working again.

This trick also helps to get rid of the banshee scream from old Mavic hubs.

 

[nmfeb70]

Take the wheel out, take the cassette off, lay it in its side and dribble GT85 or similar into both side of the hub then spin it around for a while. That may soften the grease enough to get the freewheel working again.

This trick also helps to get rid of the banshee scream from old Mavic hubs.

There has been a slight rocking sound lately when the wheel is turning in top gear up on the work stand.

 

[Paulus]

There has been a slight rocking sound lately when the wheel is turning in top gear up on the work stand.

If everything is dry with the freehub, it could be that the wheel bearings need a bit of attention too.
Is there any ''rocking'' movement, or it just sounds like it.
Either way, check, regrease and adjust the wheel bearings. It's a fairly easy job if you have a cone spanner and some basic tools.

 

[nmfeb70]

If everything is dry with the freehub, it could be that the wheel bearings need a bit of attention too.
Is there any ''rocking'' movement, or it just sounds like it.
Either way, check, regrease and adjust the wheel bearings. It's a fairly easy job if you have a cone spanner and some basic tools.

No movement as far as I know, just a rocking/knocking noise when the wheel is in full spin. The bearings have recently been greased. I'll get it up on the stand tomorrow and inspect it. I am not familiar with freehub/cassette type sprockets, having always had freewheels.

 

[nmfeb70]

Well, I removed the cassette & the freehub was working perfectly. I replaced the cassette & it's now fine.
Now I'm confused 🤔

 

[nmfeb70]

The RD cage was bent & I'll need a new one. Maybe that was the cause? 🤔

 

[GuyBoden]

Take the wheel out, take the cassette off, lay it in its side and dribble GT85 or similar into both side of the hub then spin it around for a while. That may soften the grease enough to get the freewheel working again.

This trick also helps to get rid of the banshee scream from old Mavic hubs.

I would still do the oil trick above too.