Jayco includes the axle manufacturers details and procedures with the trailer, it's part of the paperwork package provided with the camper.
I agree there is no need to add grease but there is a need for a procedure to repack the grease. This is the purpose of this design, to make that easy to do (thus the name EZlube). It's not for adding.
But the procedure to do this is not understood.
Reasons not to use EZlube is: 1) You will not read the instructions. 2) You read instructions but do not follow them. 3) Someone told you they had a problem after they did not read or follow the instructions.
I have an 8 year old enclosed trailer with EZlube axles. It's been lubed by me every year for 8 years. There is no grease in the brakes, I know this is true because I checked the brakes this year. I can do both axles on that trailer in 20 minutes.
Jack up the wheel - add one shot of grease - spin the wheel- look to see that grease is coming out the front - proceed to change the grease with additional shots.
Don't jack it up - pump like crazy - Where is it going? - put the plug back in and then head off down the road and discover that grease on your brakes is a real problem.
With all that said.......There is nothing wrong with the old tried and true hand repack and adjust method. You don't need all the extra grease that comes along with the EZ lube method in the first place.
But, they do work.
No man has a good enough memory to be a successful liar. Abraham Lincoln
2016 36FBTS Pinnacle
2016 F350, 6.7, 4x4, DRW, long bed
B & W Companion 5th wheel Hitch