Buying a Trailer Center Cap When purchasing trailer center cap, there are a few points to consider. For one, like any type of various other vehicle components, there is a range of designs that will match with your vehicle and develop a worked with look. There are likewise a number of additional accessories that you can acquire to boost your trailer. These include axle covers, aero covers, wheel simulators and more. Some people buy dirt caps to keep the elements away from their trailer bearings. These can be an excellent concept, as well as they are fairly affordable. The problem is that they can come to be damaged, typically when eliminating them to examine or regrease the bearings. In many cases, the wedge pins that hold them in position may come off. If the wedge pin is not effectively set, it can scrub against the within the dust cap as well as push it off. A better alternative for securing your bearings is to purchase oil-lubricated hubs. A number of manufacturers, consisting of EZ Loader and Ranger, make these. They work by dipping the centers in oil that is circulated by centrifugal pressure as the trailer wheel revolves. Some experts think this technique of lubrication will last longer than grease, and it is simple to inspect the degree by looking at the oil color (milklike suggests water). Another benefit of these hubs is that they are less complicated to relubricate. It is suggested that the lubrication be done with an automated hand grease gun as opposed to a pneumatically-driven or auto-greaser, which can use too much stress. The excess pressure can deform the real seal on the bearing and also create the dirt cap to blow off. One drawback to utilizing oil hubs is that they can create issues if your trailer rests for long periods of time. The oil will certainly have a tendency to work out versus the lower half of the bearing setting up, leaving it prone to contamination from water. This will not occur with a grease-lubricated center. Also, some owners find the oil dries up, creating a hard crust that can be hard to get rid of. The Good News Is, Tiedown Engineering uses a system that can transform an oil-lubricated trailer hub to a grease-lubricated unit. This was a 2001 Marine Aftermarket Accessories Trade Convention Advancement Award victor. Kodiak Trailer also makes a similar item called TurboLube. It is a two-part system that secures the internal part of the center with an outer component that rotates with the hub to keep the oil flowing.