my dealer came out and inspected the tractor couple of weeks ago and agreed that somthing wasnt right. i needed the tractor for some farming works and couldnt take it out of service until yesterday. the dealer came out and took the tractor back to the work shop and dropped it back today all fixed. it turns out that there is a cir clip in the lower swivel housing that the ends of were not lined up with the drain hole. the oil needs to drain through the lower bearing and out past the cir clip via the end gap of the same cir clip.
cheers
xcat