Had the same problem, didn't ruin a bearing, but could not get zerk fitting to take grease. I could remove the Zerk fitting place it in the grease gun, grease would pass thruogh. Put it back in the axle, would not take grease.
Replaced zerk fitting, fixed the problem!!!!!!! The spring in the bad zerk fitting was missing that holds the little ball against the front grease hole.
Put in a new zerk fitting, your problem will e fixed!!!
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