Quote Originally Posted by BennehBoy View Post
The shaft o-rings are pretty simple to do but you have to be careful to not 'shave' them when tapping the shaft back in - I lube them up with vaseline to help them slip back in.

The hard part is replacing the gearbox output seal, it's located around a interference fit 'land' which is pressed onto the output shaft - normally you should renew this if you are doing the seal - it's a bugger to get off if you don't have a gear puller!

I've seen some people fit a new seal over the top of the land by using a sheet of rolled up plastic to slide the seal over the top (it can get caught on groove on the land otherwise), again vaseline it up to help it slip over.

Lube your rubber O rings with rubber grease, if they are silicon a bit of gear oil, will do, Regards Frank.