Chris, I think we are going to need photographs showing detail of the output shaft bearing to be able to delve into this one. Kubota brushcutters are not well covered on the internet, and the chances of finding someone who has dismantled a D210 gear head, and remembers the details, are not all that good. Here is a generic gear head (happens to be from a Tanaka, but they probably didn't make it themselves anyway):
[Linked Image]

As you can see, on this one the output shaft's outer bearing (16) is retained by a circlip (17). After you remove the circlip, it appears you can pull the output shaft (15) out and the bearing will be pulled out by the shaft. At this point we have three possibilities:

1: You have not seen the circlip, but it is there.
2. The circlip was ripped out and flung into the distance when everything was getting twisted and mashed on your output shaft.
3. Your gearhead is of a different design and does not use a circlip.

As I said, I think that unless we have a member who is familiar with your brushcutter despite its relative rarity, we are going to have to have a brushcutter guy such as Bruce recognise your gear head as being a generic design. That means we will need detailed pictures to get anywhere with this.

Last edited by grumpy; 14/11/12 09:55 AM. Reason: Add identification numbers