Vault barrings/axles Larry,

I had not heard of them before we got this trailer. From everything I have read (in many places) they are sealed units. It says;

"The VAULT “Hybrid Lubrication System” uses a semi-fluid oil in a pressurized chamber to give you the ultimate in wheel bearing lubrication and protection. At ambient temperatures the oil is thick with a viscosity approaching grease. As the bearing temperature rises during towing, the VAULT’s Hybrid Oil thins out replenishing the bearings with lubricant and dissipating heat. No inspection, no maintenance and no service required."

See them at; http://www.pacifictrailers.com/The-VAULT-Hybrid-Lubrication-System/

We will see!??????

Greg