Thanks for the response.
The clutch is working OK.
I've had the rear drum split during the refurbish as it was in a mess with mud water damage etc.
When I split the drum, the rachets obviously fell apart. I can only see it being assembled one way?.
The drive shaft gear through the drums ca only be assembled one way, but what I'm questioning is how the rachet pawls are positioned on the drive gear.
The machine drives ok, can turn left or right and the corresponding drum will freewheel, but I can't pull the mower back because the pawls lock the drive shaft.
I was hoping that you might have a drawing of this assembly.
Regards,
Peter