Looks like the axle adjustment, greasing bearings, changing zerk fittings is good education for keeping your RV running gear well maintained.
I know when I first found my problem with the axles out of adjustment until now has been an education.
From what I read, a lot of owners know a lot more about their TT, 5ver, Roo, toy hauler ETC from this forum
VERY GOOD FORUM
Sid, Lois & HRH MISSY Terrible 2s SHIH TZU
2011 ROCKWOOD 8285 WS
2014 F-250 KING RANCH PS/SD/6R140/BFT
BOLIY PRO 3600SI GEN
DAYS CAMPED 2016 57 DAYS