hmm... The front axle of a 6245 can be split in the middle. So it cant be that hard.
A 5245 front axle needs to be taken apart by pulling both driveshafts from the wheel sides and take off the rear cover. I think it is very do-able on a 6245...
I think in time, there isnt much difference between taking the front wheels of the axle, taking the steering off etcetera, bring it away and picking it up again after repair, than to take the axle itself apart and fix it.