re: Vortex / Vault hubs and tandem trailer with brakes

Whats the longest you've gone without pumping grease in vortex hubs? I have the non-break version with the screw on cap. It just seems odd not to put in new grease but it does say maintenance free to 100,000 miles. I've pumped new grease a few times, and its always clean good looking grease start coming back out of the hub. I haven't messed with them in a few months.

Had mine for about a year and probably have a few 1,000 to 2,000 miles on them.