oh...didnt see you had seals in your new bearings...

when i fixed my rearbeam last year i put a nipple in the tube between the 2 bearings and i give them a squeeze of grease twice a year,just until there comes a bit of grease out by the trailerarm

i would say the grease help keeping the water and other stuff out of the beam, so the bearing wont be fu*** again like the last one

bearings in my country are like 50