Use a bearing packer and pack them with fresh new grease. As we said earlier, the bearing assembly is a sealed unit and can’t be repaired or rebuilt. Replacing a sealed wheel bearing and hub assembly involves removing the wheel, hub nut and brakes to replace the unit. Do not use an impact wrench for removal or installation. One way to check wheel-bearing play is to raise the wheels off the ground and rock the tires in and out while watching for any looseness. See hub installation procedure for all the details. Most of these problems can be avoided by installing non-adjustable sealed ball “Green” wheel bearings. Another problem that may occur with older, serviceable wheel bearings is incorrect adjustment. 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. Please enable cookies on your browser and try again. Applications Now Being Accepted For Mitchell 1 Scholarship, Advance Launches DieHard Battery-Stocking Program, ASE Expands Availability Of Tests In Spanish, The Importance of Worn Center Bearing Replacement. Consequently, you may only have one chance during a vehicle’s life to replace these parts. They’re steel cartridges with black seals. I bought a all in one set of wheel bearings (3 bearings & 2 dust seals) and the bearings are sealed. Never use an impact wrench. Most sealed wheel bearings should have almost no play (less than .004 inches at most), and should be replaced if found otherwise. W… But he doesn’t really have any other options. Don’t hammer directly on the seal, and never use a punch or drift to install the seal. I have a 2011 Coachmen Apex 17FB camper trailer that I just bought. I believe the wheel bearing need to get repacked at least every 12,000 miles. This will work with wheel bearings and with steering head races, as shown. The quickest and easiest way to grease a wheel bearing is with a bearing-packing tool. Understanding Wheel Bearing Seals A seal must always be installed so that the sealing lip is facing the fluid to be sealed. Ideally, the new bearings should be replaced using a suitable press, but failing this usually a socket or tube with an external diameter of 40mm for the inside bearing and 35mm of the inside bearing it should be possible to tap the bearings into place being very careful not to damage the seals. If they are installed, aligned and seated properly, they should give you no trouble. The average life of a sealed wheel bearing and hub assembly is about 85,000 to 100,000 miles. Use a seal remover tool to pop the seal out of the back of the hub/rotor. Put your finger in the center and turn to feel how dry the bearings inside are. Bearing and motor manufacturers have given various reasons as to why grease fittings are installed on bearings and motors that have sealed bearings, such as: "All motors go down the same assembly line, and it is just easier to … www.processingmagazine.com is using a security service for protection against online attacks. I agree It's a good concept for non sealed bearing. I know that some (or all) Class A, B and C Rv's use what's called "sealed bearings". As long as the ABS warning light remains on, the ABS system is disabled. Chances are some of the other bearings may also be nearing the end of their journey. Yes, the Dutchman [email protected]'s have sealed, "maintenance free" bearings. 1. The service requires full JavaScript support in order to view this website. What you’ll need to do, as carefully as possible, is insert your pointy tool between the outer circumference of the seal and the metal retainer of the seal, lift the seal out at that point, then simply slide the dental tool under the seal and around the outer circumference to lift the whole seal … Heating the component around the ball bearing with a heat gun will make removal (and installation) much easier. So if the bearings feel loose, they may be adjusted too loose, worn or the hub nut may have backed off (a broken cotter pin or retainer). Even so, average bearing life can range from 80,000 to 120,000 miles depending on how a vehicle is driven and what the bearings are exposed to. Like any moving part on a vehicle that is subject to wear and contamination, wheel bearings can and do wear out. But it shouldn’t be confused with the clicks and pops produced by a worn or damaged outer CV joint on a FWD car. This is because the lip is made so that pressure applied to it from the “wet” side of the seal will tend to increase the pressure the lip applies to the shaft. They’re snugged up with no more than 15 to 20 ft. lbs. This bearing cartridge is sealed and is not serviceable (not adjustable nor grease able). The best way to check a wheel bearing is to rotate the wheel by hand while feeling for looseness or roughness, and to rock the tire to check for play. The roller, cage, rings, and race must be carefully examined for wear, pitting, or discoloration, and then repacked with the proper grease. Sealed wheel bearings are engineered for a service life of more than 100,000 miles, and many are capable of going twice that distance. A rumbling, growling, chirping or cyclic noise of any kind from the vicinity of the wheels is a good indication that the bearings need to be inspected without delay. If one wheel bearing has failed, pay close attention to all of the other hubs on the vehicle, too, especially if the vehicle has a lot of miles on it. This type of tube driver can be used with bushings and oil/grease seals. Loosen the axle hub nut, if equipped, while the tire is still on the ground. The hub should not be packed solid with grease to allow room for expansion. Please enable JavaScript on your browser and try again. If the rollers, balls or races are worn, pitted, cracked or show any damage, replacement is required. Once the seal is removed, use a punch to remove the inner bearing from the hub. Serviceable bearings should be cleaned, inspected and repacked with fresh, clean wheel bearing grease every 30,000 miles or according to the vehicle manufacturer’s recommendations. When wheel bearings are serviced, the old grease should first be removed and the bearings cleaned and inspected before being repacked with fresh grease. Technician A says that most FWD vehicles use adjustable front wheel bearings. VIDEO: Where Should Brake Lubricants Be Applied? After the lubricant has been sampled for examination, the bearings should be cleaned. There are plenty of options out there, just make sure you get the right ones to fit your machine. This process is automatic. Instead, using a flathead screwdriver, carefully pry the inner seal from the inside of the wheel hub. This will remove any contaminants from the hub that may cause problems later on, and eliminate any risk of incompatibility between the old and new grease. Recently, we have seen some domestic manufacturers reverting back to serviceable wheel bearing designs that use a captured rotor like in the case of the GM mid-sized trucks. The wheel bearings on a motocross bike are simple. VIDEO: The Importance Of Digital Vehicle Inspections, Nissan CVT Clutch Point Relearn Procedure, Limited-Slip Differentials And Diagnostics, Stainless Steel Did Not Kill The Exhaust Repair, Tech Tip: Close-Coupled Converter And Engine Replacement, Speed Of Sound: The Science Of Tire Noise. I don't know what the timetable on switching them out is. Ball bearings can be removed using a bearing removal tool or a flat faced punch and a steel hammer. Unlike sealed wheel bearings, the front wheel bearings found on a typical rear-wheel-drive car or truck employ two-piece caged bearing assemblies. Whenever the hub has been removed a new inboard seal must be installed! The slot allows the bearing race to be easily removed from the axle housing or shaft. Step 5: Reinstall the wheel bearings and wheel seal. Bearings less than 50 millimeters (mm) in diameter may be mounted by using a bearing driver if the rings are installed with a light interference fit. Little Guy carries replacements, and any mechanic should be able to do the job. The company has since been purchased by Bearing Technologies. Step 9: Clean the wheel bearings and spindle. Serviceable Bearings Wheel bearings that are not factory sealed, like on the 2WD Ford F-Series and GM Colorado and Canyon models, are starting to make a comeback. If a sealed bearing assembly is noisy or feels rough when the wheel is spun by hand, it needs to be replaced. Also disconnect the ABS connector and/or sensor if mounted to the hub. Many hub units for FWD applications come with a new hub nut. Pushing the seals out of bearing - not so much. When wheel bearings are installed, use new grease seals. Do not use an impact wrench for removal or installation. When a customer hears how much it’s going to cost to replace the hub assembly, he may suffer an instant attack of sticker shock. A bearing failure can be dangerous because it may cause the wheel to separate from the vehicle and/or cause a loss of steering control! Use a torque wrench and tighten all bolts and nuts to specifications. The part is expensive and requires a lot of labor to install. Bearings do not loosen up under normal use. http://www.rrrtoolsolutions.com/We use our Seal and Bearing Driver tools when Installing bearings and seals. Remove the wheel and brake assembly following the specified procedure. Three heaping tablespoonfuls is usually enough for most car and light truck hubs. Use a quality high temperature wheel bearing grease (a #2 NLGI lithium-based grease, for example) or a synthetic wheel bearing grease. Here’s a link to an All Balls 25-1404 Wheel Bearing Kit on A bad outer CV joint usually only makes noise when turning, not when driving straight ahead. This entails being removed, chemically cleaned, and allowed to dry naturally. Once a ball bearing has been removed, it should be replaced with a new one. Replacing a sealed wheel bearing and hub assembly involves removing the wheel, hub nut and brakes to replace the unit. www.processingmagazine.com is using a security service for protection against online attacks. Bearing race drivers should be used to drive wheel bearing races into hubs whenever possible. I like using the All Balls bearings and seals, I’ve had good luck with them in the past. Too much play can allow steering wander (which may be mistaken for worn steering components or the need for an alignment). In general, light oil or kerosene may be used as a cleaning solution. Diagnostics The first symptom of wheel bearing trouble is usually noise. To remove a bearing with a punch, set the tool up against the edge of the race working from the opposite side. In any event, loose wheel bearings should not be adjusted until the bearings have been removed and inspected for possible damage. Tapered wheel bearings, which are usually seen on older motorcycles, may be able to be removed. Tapered roller bearings on the front of RWD vehicles are never preloaded. Listen to the latest Brake & Front End podcast. Bearing Cleaning. UNITIZED WHEEL BEARING HUB The FKH unitized wheel bearing hub, is fitted with an SKF bearing cartridge. Then the adjustment nut is loosened 1/6 to 1/4 turn, and locked in place with a new cotter pin. There is an indention in the outer part of one end of the clip to allow a screwdriver to be used to pry it out. Used seals can leak and contaminate brake linings or cause premature bearing failure. When bearings are inspected, the appearance of the bearings should first be recorded and the amount and condition of the residual lubricant should be checked. News: ASE Expands Availability Of Tests In Spanish. These bearing extractors grip the inside race of a sealed bearing, allowing the bearing to be tapped out of the hub shell or frame component. As with the other parts you've removed, place them on the same rag when this step has been completed. This should not affect normal braking, but it will prevent the ABS system from helping out in an emergency or when braking on a slick surface. The noise may change when turning, or become louder or even disappear at certain speeds. If there’s play in sealed bearings, replacement is necessary. The service requires full cookie support in order to view this website. www.processingmagazine.com is using a security service for protection against online attacks. Wheel bearing noise is usually proportional to vehicle speed, and does not change when accelerating, coasting or decelerating (which distinguishes it from differential, transmission or U-joint noise). If the bearings are the serviceable kind, they need to be removed, disassembled, cleaned and inspected. First, clean all the grit and grime off of the bearings. Once a wheel assembly is removed from the axle, the wheel bearings are easily removed by taking out the metal retaining clips that secure the bearings and grease felts. They may still go bad and need to be replaced on occasion. The other safety issue involved is the ABS system. Unfortunately, the original Mopar Green wheel bearing design has 2 problems. As a rule, end play should be about .001 to .005 inches. (1) Simple Simon. If he ignores the warning signs and does not have the hub replaced, it will only get worse. And, be sure to torque it to specifications with a torque wrench. Service and replacement is making a comeback on some vehicles. Cleanliness Equals Long Life Always use a high-temperature, bearing-rated or manufacturer-specified grease to repack new or used wheel bearings. But if the bearings are the adjustable variety, a simple adjustment might be all that’s needed. That will allow the rotor/hub to slide off the spindle with the bearings and the seal attached. Also, re-using the old accessories such as bolts, nuts, circlips, split pins, seals,… instead of replacing them with new ones can cause the wheel end bearing to operate under abnormal or unsafe conditions, increasing wheel end bearing wear and risk of a car accident. Use a seal installer to tap the new seal in place. As for the bearings you use, it’s up to you. Insert the extractor into the bearing, tighten one side with a matching wrench, and the collet expands to grip the inside of the bearing. Chassis: Alignment Specs: 2009-2013 Subaru Forester, Chassis: Alignment Specs: 2002-2010 Jeep Liberty, Chassis: Why Shocks, Struts, And Tires Wear Down, News: Applications Now Being Accepted For Mitchell 1 Scholarship, News: Advance Launches DieHard Battery-Stocking Program, Video: VIDEO: The Importance Of Digital Vehicle Inspections. Wheel bearings need to be serviced. It’s not something to ignore or put off because there’s no way to know how many miles the bearings will go before the unit fails completely. On FWD cars with adjustable tapered roller rear wheel bearings, the bearing adjustment procedure is usually the same as with RWD vehicles (zero preload), but some do require a slight preload. Many hub units for FWD applications come with a new hub nut. Some people think servicing wheel bearings is a thing of the past — like measuring dwell on a set of ignition points. Never reuse old seals. The name comes from the Green Bearing Company which first produced them. Installing the new bearings. Once removed, you can wash them in solvent and dry them using compressed air or a clean cloth. As a rule, there should be no play on most FWD cars, but up to .010 inch of play in the front bearings may be acceptable on RWD cars and trucks with adjustable bearings. Video: VIDEO: Where Should Brake Lubricants Be Applied? of torque while rotating the wheel to make sure the bearings are seated. Use it. Removing and Reinstalling Sealed Wheel Bearings Using the Unitized Wheel Bearing Hub Style. Technician B says that If only the cage is damaged on a tapered roller bearing a new bearing can be installed with the old race. Use a torque wrench and tighten all bolts and nuts to specifications. If the seal must be installed over a rough part of a shaft (such as splines) to get to where it belongs, wrap masking tape around the rough areas to prevent seal damage. With the parts and axle removed, you should see the sealed bearings on either side of the hub. Overtightening adjustable tapered roller bearings is a common error that can lead to premature failure. Thanks for the input Since this piece is sealed, it is difficult to inspect directly. I purchased the tool but won't use it as the bearings on my RZR are sealed - greasing the bearing is a great idea. Adjust the bearings to specifications. You will be redirected once the validation is complete. These types of bearings use a rolled element rather than balls and are designed to keep dirt and grease out. Driving tools consist of a metallic tube, polymer impact rings and a dead blow hammer (see Image 2). wheel bearings are assembled by the manufacture with proper lubrication and sealed for life serviceable bearings wheel bearings that can be disassembled , cleaned , inspected , packed , reinstalled, and adjusted Miss that opportunity and it may be gone forever. If, for any reason, the bearing must be removed from its original packaging, apply preservatives and ensure parts are rewrapped. In the future, many will be neglected and never receive any maintenance whatsoever except maybe when someone is doing a brake job. But, even with sealed hub units, inspection and service have not gone out of style.
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