Grob 103 Twin Astir tailwheel axle?

We would like to replace the tail wheel on our Grob 103 Twin Astir. The bearing appears to be 25mm, but on each side there is an insert which reduces it down to a hole for a bolt which is 8mm. The inserts on both sides rotate separately, so I would not call it an axle, but if it were one piece it would be about 80mm long. I have been in contact with Wings & Wheels and they have the right wheel, but with the 25mm bearing hole empty. I don't see any obvious way to remove these inserts… no set screw, locking washer or anything. Do they just press in and need to be tapped out with some tool?

Here's a pictu https://docs.google.com/file/d/0B1pU...it?usp=sharing

The hole size on these is usually 20 mm. You should be able to push out the insert by inserting a smaller rod from the other side and tapping the insert out. You may find that there is some corrosion of the insert causing it to bind in the center of the bearing.


Here's a pictu https://docs.google.com/file/d/0B1pU...it?usp=sharing

You need the Tost "Moritz" or "Moritz II" wheel
The Moritz II has a split hub so changing tyre is much easier.
(http://www.tost.de)

Comes with 12mm or 20mm hole - The 20mm option should fit the inserts for
the G103.

At 11:07 24 June 2013, wrote:
The hole size on these is usually 20 mm. You should be able to push out
the=
insert by inserting a smaller rod from the other side and tapping the
inse=
rt out. You may find that there is some corrosion of the insert causing
it
=
to bind in the center of the bearing.

=20
Here's a pictu
https://docs.google.com/file/d/0B1pU...YtZWpLZlZMRlF=
tbm8/edit?usp=3Dsharing

Yep, a punch from the other side did the trick. At least on one side... the other is going to need an overnight soak with Liquid Wrench to persuade the rust to let loose.

Thanks for the advice. I didn't want to start pounding on something if that was the wrong approach.