rear PTO info required

Hi Folks,
I bought a Series III 109 rolling Chassis with a rear PTO fitted and want to bring the Chassis back on the road and refurbish the PTO.
Where can I find manuals or parts lists or any other kind of documentation of the rear PTO? Does anyone know where I can buy seals and bearings and other stuff for the rebuild?
I see the missing part of the drive shaft can still be bought from Pegasus Parts?

regards
Stefan

Hi Steve,My series 2a manual has details of all PTO system and should be available as a download.

The S3 Optional Extras manual has an exploded diagram and I think a parts listing. I suspect they're unobtainable now. Places like Dunsfold might stock bits. If you can get it working that's a rare accessory and a useful one at that. Great for drive belts for saws n logging equipment.