Hi all thanks for your comments and suggestions.
So I bought new Multi G fluid and started the process of draining the rear/main reservoir and replacing the filters.
Question, there are two drains, two filters but only one port to fill from in the back is that correct?
Its raining today so probably tomorrow Ill continue and fill the system up, move the used oil to the empty containers and then move to the front axle, draining/inspecting and then filling with the clean used oil and giving it a run then re draining and checking.
I was also in the process of getting new front tires mounted yesterday as they had arrived so while the oil was draining I gave the front axle/hubs a close look over and there is a leak, on the right hub on the inside. I cleaned it all up waited but saw nothing new leak out, so I will keep that clean and watch it, assuming after I refill it will leak again.
Question - is there a common cause to leaks on the front hubs?
Also, on the hub there appears to be a filler point, its a bolt that is at an angle on the hub housing, is there a separate area to add oil to them? My manual doesn't indicate it.
Thanks ~ Phil