Stuck Cassette Hub

[npn]

I've tried everything and I can't get it to unscrew. The hex key size is unusual - 11mm but it should it be the same principle right? Counter clock wise to unscrew.

 

[one-eyed_jim]

I don't recognize the hub, but some manufacturers use a hollow retaining bolt that comes from the hub shell into the freehub body, rather than from the freehub body into the shell. That gets around the wording of Shimano's patent.

If the bolt head is inside the shell, you need to turn the bolt clockwise from the freehub side, or anticlockwise from the other side to loosen it.

 

[npn]

I tried that earlier, and now I double checked and I don't see a bolt head inside the shell. Still no progress

 

[integerspin]

Take another look.
I had a new hub bought for parts. The freehub body has threads and
goes in to the ali of the hub, 11mm hex key needed to undo it.
There is also a bolt going in from the other side, it threads into the
freehub so has to come out to remove the freehub. This bolt also has an
11mm hex in it and with a 23mm OD when you look in the hub it's not
obvious. I couldn't see the head, but when I looked at the hex[bihex] I could
see there were two.

Need a new freehub?

 

[npn]

You're right. Unfortunately I don't have 11mm hex that long... I needed to take it apart so I can lubricate it, now it makes a horrible grinding sound on each rotation.

 

[ishaw]

Re:

You can't really take these apart as they are pretty sealed. You'd be best getting a replacement freehub.

There are things you can do to try and clean them out and regrease, so worth it if you can't get a cheap freehub to fit.

 

[integerspin]

Taking them off doesn't make stripping them that much easier.
I guess I used an 11mm key long way in to get it apart.

I drilled some holes in a bit of nylon and clamped it into the bearing, with a few Orings to seal it and
then pumped oil though it with a pump oil can.
I had a freehub that sounded like a load of bolts in a can, after pumping oil through it has been quiet for 3 or 4 years!

 

[npn]

Taking them off doesn't make stripping them that much easier.
I guess I used an 11mm key long way in to get it apart.

I drilled some holes in a bit of nylon and clamped it into the bearing, with a few Orings to seal it and
then pumped oil though it with a pump oil can.
I had a freehub that sounded like a load of bolts in a can, after pumping oil through it has been quiet for 3 or 4 years!

Very interesting and I'd definitely want to oil mine, but I can't make out what's on the picture and you did. Maybe my hub is different. What I tried is spraying a lubricant from the other side with a straw nozzle

Can you elaborate?

 

[integerspin]

The hub being oiled is an M732.
The only access to the freehub bearings is between the bearing race and the outer freehub body.
The nylon plug is sealed against the cassette nut and the bearing race.
Well it was intended to seal, it leaked quite a bit but I got enough pressure to force oil though the freehub, I had oil flowing out of the gap between freehub and the hub.

I am not sure what the freehub is off, I thought I only bought shimano hubs as I wanted it for spares. It's not even got a rear seal and I can see the bearings if I look at the back of it.

You could try submerging the freehub in warm oil and see if it does anything.

 

[FluffyChicken]

Re:

Have you got a socket extender...big long bar...
Use that to get the 11mm in there.