Hi Norm,
Again firstly, THANK YOU for the replies.
All done, I packed the rear of the seal with a general lithium grease, it went on over the pinion and axle easily enough - was careful to ensure I thoroughly cleaned beforehand to ensure no grit etc was accidently put in that could compronise the seal to metal contact. Was careful to not unevenly push the seal in, didn;t have a large enough socket to use an d no slide hammer - so improvised with a large round headed spanner that I slipped over the seal and gently tapped in different spots with a hammer, went in without issues - nice flush fit.
Wiped down thoroughly, replaced the wheels (didn't do the seal on the other side as it's had no issues).
Topped up the gearbox, as I had it I put about 100ml of the semi-fluid grease in first - then filled up until it overflowed with the Penrite 85W-140 mineral gear oil. Moved the gear position around during filling to ensure there were no voids etc. Wiped everything down very thoroughly to allow spotting of any leaks.
Took for brief spin, came back left for an hour, checked and no leaks at all. Seems a job done. Much thanks, thats a new one of the belt, pretty lame I'm sure but very much appreciate the assistance
