I got this vault, one guy on MB says regardless of what it says it needs to be repacked yearly? You, internet all say to leave it alone & only use a specific grease. \Now how you get to that point without seeing a crapload of smoke from all the burning oil/grease I'm not sure. If you manage to screw one up to the point of your picture then you have the same problem. No matter what you use (oil, grease, vault lube) if it is able to leak out then you have a problem. In the simplest terms they are just a bearing buddy with no way to continually add grease (and over pressurize the system). In the meantime all you do is watch the button on each hub to see if it is still pushed out and check for any grease leaks. Basically by cleaning them out and repacking them with the special grease. Also a good time to check for excessive bearing play Spin the wheel & listen for any rumbling noises as this indicated corroded bearing surfaces. Jack the trailer & tap the calliper to move over so one side is not dragging on the disc, just enough to permit free rotation with no drag. Hubs, I mean grab the bearing cap.Īnother simple check before the trip. You should not notice any substantial difference in hub temp between the 4 hubs. If it is any hotter than Luke warm, put it on the maintainence list to check the bearings. Make sure you follow the instructions & use locktite on clean surfaces where the contact is.Īs a rule of thumb on any trip not involving a lot of extended braking, as long as you have a 5 min run with little brake use, when you stop check the hub temp. Why, the workshop did not know the Vault caps are held in place with locktite stud adhesive. I have only had one issue with the Vault cap coming off on a trip, the one removed & reinstalled. They found it too hard to remove so they put the vault cap back on. The shop that did the work attempted to remove the rotors which have The Vault system. So I arranged to have the trailing arms hot metal sprayed. When I rebuilt my trailer I could not break down the torsion axle to permit galvanising. Having had a UFP actuator failure and two flat tires on long trips I am a believer. Fairly in expensive to purchase (~$300) and have a tire shop install. The trailer TPMS monitor gave me a high temp warning, I pulled off and fixed the issue before it fried my trailer brakes, spindle and hubs. I had a actuator failure on my trailer a few years back. If you had a programmable tire pressure\ temperature monitoring system you may have caught the rising temperature before you had a total failure. I know I have been flamed for recommending this but I have to put in my 2 cents. To me that speaks volumes from the manufacturer standing behind the product from a reliability standpoint. They seem to be running cooler and so far after ~1200 miles working great. Hated my greased axles which constantly needed care. Trying to see how Vaults would be any different, other than that they are less likely to leak. But my oil bath hubs were full, then one started leaking during the tow and without warning fried the bearings to the point that the spindle was torched so bad and I could barely get the wheel off (spindle nut/threads warped). I get what you are saying, you can always throw a new hub on, even on the side of the road. I see them as a "better" oil bath solution because of the viscosity of the hybrid oil, but the problem is if the oil leaks out your bearings will be toast in no time just like oil bath. I guess the key would be to watch for leaking fluid as your maintenance, and if they leak, you replace the hub, right? I'm going to go by the trailer shop to take a look in person. That looks like the installation guide but I thought you don't really service them once they are on there. Maybe I don't understand Vaults completely. Have a look at this, it is the service procedure for the vault hubs, nothing too complicated here and done with the same tools you would use with a standard dust cap or bearing buddy setup. You could either carry a spare standard hub and some grease or a spare hub with vault cap and the correct grease. There is nothing magic about the vault hubs.
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