Anyone have any experience with the Vault Hybrid Lubrication System? It's what is on my boat and it says it's maintenance free. I'm not sure how true that is and not wanting any bearing problems on the road somewhere. 

https://www.pacifictrailers.com/blogs/boat-trailer-tips-advice/the-vault-hybrid-lubrication-system?

I believe they are standard on most new bass boats. My ranger has them.

I was told as long as the bearings are not getting hot or leaking don't mess with them.

The ranger rep also told me to jack up the trailer once a year and make sure the wheels don't have any play, when you try to rock them back and forth. If there is play you need to take it to a shop to get adjusted. 

This is the first trailer I have owned that has them. Four years and no problems yet.

 

My last 2 rigs have had them. My new boat is a year old and the dealer told me basically what is listed above to check em yearly but supposedly maintenance free for so many years. U like the concept but I also kinda prefer the old fashioned shoot 2 squirts of grease and roll on. It does seem to be standard on all the new rigs and maybe time will give me more confidence. I wanna say my last rig had little button covers that as long as they could be pushed in meant it was good. 

Yeah I'm use to old school bearings, repacking them a couple times a year and usually replacing the bearings, races, and seals every winter. I feel the tires after every trip to make sure they're not excessively hot and they've just been warm like is to be expected. Just makes me nervous not doing anything with them or having them serviced but I guess I'll give the tires a spin and try rocking them to make sure there's no wobble occasionally and just keep an eye on them. All too familiar with axle and bearing problems and not looking to deal with them again.