Rauch komet spreader

Hi.
Are these fert spreaders same as a kuhn.?
Are spares still available?
Gearbox gone wonky...
Spreading merrily, no problem, then spreader stops Spreading.
Pto still going.
I suspect maybe a bevelled gear perhaps-expensive? Or maybe a pin has dropped out inside.
Discs still move,but no engagement.
Options?? Worth fixing?? Any parts book??
It was a great lil spreader...
Tia.

Hello. Great result and good news for my lil spreader. Fearing the worst,I undid the lid on the gearbox.no oil or lube... No broken shaft though...
what appears to have happened,is the circlip holding bearing in place has become detached & caused the bearing & bevel gear to move upwards away from positive contact. Have renewed bearings,seal,circlip etc.
I have no filler cap on this model...old. have drilled & popped one on for future maintenance.
Was gonna use k400ep /semi liquid grease-same as power harrow troughs. Will that be ok...or use thinner gearbox oil...
Thanks