Originally Posted by Bob Miller
Because it's a new axle, I'd stick with one of the recommended greases BUT...
Just adding grease with a hub fitting also runs the danger of overfilling the hub, in which case the rear seal can be breached and, if you have trailer brakes
, they can be ruined.
Because it's a NEW axle, I'd pull the hubs and see how much is in there from the factory and add or not add more grease accordingly.
E-Z lube axles are designed to be used just as you say not to.
Used properly, an EZ-Lube hub can not be over filled, in fact it is designed to push the old grease out into the chamber where the zerk is located.
You should of course hand pack the wheel bearings on a new axle after about 500 miles or before your first trip. The purpose is to be sure that the bearings are loaded and packed properly.
After that you can use the manufacturer's repack schedule, or hand repack every year, or every season, or even every trip if it provides peace of mind.
Check your hubs regularly for excess heat while in transit.
I think the risk of failure increases with the frequency of disassembly after a point.
I personally hand repack an EZ-Lube axle initially and then only when brake inspection is needed. That has been at about 30,000 mile intervals for me.
Between inspections I use the EZ-Lube as designed... otherwise, there is no point to having EZ-Lube.