Stop worrying about water, grit, and constant bearing upkeep. The sealed Vault system helps keep contaminants out, uses a heat-responsive hybrid lubricant, and needs no lubricant added or changed for the first 5 years.
Once the Vault system is filled and installed, you can leave the lubricant alone. Adding or changing the lubricant is not necessary or recommended during the first five years of service. That means no routine topping off, and the system stays closed while it protects and lubricates your trailer bearings. It's also backed by Dexter's 5-year limited warranty.
Vault uses a semi-solid lubricant that becomes more fluid as your bearings heat up on the road. As the temperature rises, the lubricant flows more freely around the bearings, giving you the lubrication benefits of an oil-bath while keeping everything contained inside a closed hub system.
As operating temperature and pressure increase inside the hub, the attached plug at the end of the Vault cap extends outward. The closed, pressurized system helps keep water and contaminants away from your bearings, making it especially useful for trailers that see wet conditions or regular trips down the boat ramp.
Vault works differently from other grease caps with an external zerk fitting. You can't simply add lubricant through the installed cap. When lubricant service is eventually needed, the entire Vault cap must be removed to access and refill the hub. It's a messy process, but one you shouldn't need to tackle during the first five years of service.
Vault compatibility is based on your trailer's axle weight rating and hub bore size. This kit is designed for 4,200-lb and 5,200-lb axle applications with a 2.328" hub bore. You also get two Vault assemblies, O-rings, 1 tube of Vault hybrid lubricant, an installation tool, grease fitting, and Loctite for the installation.
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