While rotating hub, tighten the spindle nut to 18-20 inch-pounds, which is about “finger tight.” Do not over tighten. Remove the cotter pin and spindle nut retainer. Continue this procedure until you slowly “walk” the cap out of the hub. Place the wood on the opposite side and hit it again. To remove the cap, lay a block of wood against the side of it and strike the wood with a hammer. The protector is held in the hub by an interference fit.
Remove the VAULT wheel bearing protector. This procedure is only to be carried out if bearing adjustment is deemed necessary after performing the bearing check procedure described in “BEARING CHECK” section. If you believe service is required, you must contact UFP before performing any work that would be covered under warranty. The VAULT does not usually require any service. Be sure the safety chains (or cables) and emergency brake cable (if equipped) are in place and properly secured so that they won’t fall off.Check that the trailer wiring is correctly hooked up and working. Be sure the trailer jack is raised and locked in place.As insurance, insert the safety hitch pin or another locking device into the hole in the coupler to be sure it is properly latched and won’t accidentally pop open. Never use an impact wrench to tighten lug nuts. Wheel lug nuts should be tightened to a specific torque using a torque wrench (see your owners manual). Make sure your wheel lug nuts are tight.Verify that the trailer is level to the ground with both the trailer and tow vehicle loaded with gear.Improperly inflated tires can cause catastrophic tire failure WHAT ELSE TO CHECKĪs a minimum general rule, before towing any trailer, make sure to at least check the following items on the trailer: If excessive leakage is occurring, contact UFP for instructions. OIL LEAKAGE AT REAR SEALĪ slight amount of oil seepage at the rear seal is normal and necessary to lubricate the wiper lip of the seal for long life and sealing contaminants out. If you can move the outer edge of the tire more than 1/8”, your bearings may need to be re-adjusted. Grip the edge of the tire and see if you can rock or move it. Jack up on the side of the trailer (make sure you use jack stands and chock the trailer wheels to keep the trailer from moving). To assure your bearings are in good working order, we suggest you check your bearing adjustment at least once a year by following this procedure. Wheel bearings have been precisely torque-set at the factory. Failure to contact UFP before the work has begun will void the warranty. We will help diagnose the problem and send instructions to assure that the work is done correctly. If the bearings need to be adjusted or replaced, you must contact UFP first. The VAULT combines the benefits of oil and grease, lubricating and protecting your wheel bearings in a sealed pressurized chamber impenetrable by outside elements. After your warranty period expires, refer to the “SERVICE” section for additional instructions. All warranty service must be pre-approved by UFP, or the claim will not be considered valid. ADDING / CHANGING HYBRID OIL LUBRICANTĪdding or changing the lubricant in the VAULT is not necessary or recommended for the first five years of service, or ten years with the extended warranty. For optimal performance, only UFP’s Hybrid Oil Lubricant should be used in this system. As the bearing temperature rises during towing, the oil thins out, replenishing the bearings with lubricant and dissipating heat. At ambient temperatures, the oil is thick, with a viscosity approaching grease. The VAULT “Hybrid Lubrication System” uses proprietary hybrid oil lubricant specially designed by UFP.
There is no need for inspection or replenishment of the lubricant. The pressure inside the hub is needed to keep water out of the hub chamber when the hub is submerged under water during boat launching and retrieval. The slight (3-6 psi) pressure the VAULT system generates inside the hub chamber WILL NOT damage the inner oil seals.
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