If the bearing contained a sensor ring or pick-up, care had to be taken to install it on the correct side, as the bearing appeared the same at a quick glance, in many cases. Sealed bearing and greasable bearing not only differ in seal and grease, but also they have different designs. Those that arent sealed can be serviced on schedule at All Pro Servicenter. Save my name, email, and website in this browser for the next time I comment. Also, it tends to support different parts of a machine. Then re-install the caliper. When the bearing is well-packed, put it down on a new clean paper towel. A seal keeps the grease in and water and dirt out. These bearings also came with or without ABS-sensor rings, depending on the application. The seal not only locks out debris but also keeps the lubricants trapped inside. With the seal out, withdraw the inner wheel bearing. What's bad is that sealed wheel bearings typically cost more, generally require more disassembly of driveline components, and may require a hydraulic press to remove and install. That's why the wheel bearings on routinely immersed boat trailers need extreme maintenance. Axle Shaft Seal vs Wheel Seal | Lugnut4x4 Shields are no point of contact between the bearing inner ring and the shield bore. If any dirt, debris, or other contamination gets into the bearings, it could reduce lubrication and increase friction. My 37 years in the truck repair business I have seen these come and go. Do this with both the inner and outer bearings. We may earn commission from links on this page, but we only recommend products we back. June 1, 2006. So they are suitable to be used underwater. Pretty much all new wheel hub assemblies come equipped with built-in sensors that inform the traction control, ABS, stability control, and other driver-assistance systems. Tapered bearings are most often used in wheel bearing assemblies mounted inside of wheel hubs. Most of the sealed bearings are/were Dexter NevRLubes--there seems to be a trend away from them, it has been mentioned that they may fail without warning, since there is no adjustment. That design caused way more stress than a conventional design with the bearings spaced some distance apart. Installing these bearings was sometimes a time-consuming process, and caution had to be taken to support the inner and outer rings properly when finally pressing the bearing and hub in place. Be sure to also get ALL the components you may need: races, seals, grease, and special tools as well as the bearings themselves. The flange can be either a wheel hub or a mounting flange, and they have been used for both driven and non-driven axles. A seal keeps the grease in and water and dirt out. A sealed bearing is protected from debris and weather. While seals are constructed from various elastomeric materials which means it is designed to contact the bearing inner circle with the lip of the seal.
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