Hi.
I just checked, and that is supposed to have the outer cover (16), a gasket (15) a nut (not shown), then a washer, 17 outer tabs and 1 inner (not shown), then a bearing (14). That fits into the cast housing (13), which the spring is connected to. Behind that is another bearing (14), tabbed washer, 17 outer tabs and 1 inner (not shown) and a seal (12). It all mounts on what looks like a stub axle.
I'd guess that once the nut and front lock washer is removed, you could slide the whole spring/cast housing/inner and outer bearing off the stub axle.
Maybe try a big 3 arm puller? It definitely slides off the stub axle.
I checked the manual and the original bearings are 2 piece units.
The description is "cup, tapered roller bearing, single row, 0.125" by 5.375" by 0.875" O/A W."
"cone & rollers, tapered roller bearing, single row, straight bore, 3.3750" bore by 1.1750" LG"
The seal was one of the leather type. 4.125" shaft size by 5 1/2" bore dia by 9/16" W.
Hope this helps.
Greg.