how to adjust tapered wheel bearings without torque settings
Find out the appropriate amount. Scott M. 19 years ago. Then pull the rotor while still oscillating and reread the dial indicator. Step 1: Put the brake rotor and caliper back on. This bearing construction accommodates combined loads and provides low friction during operation. Anyway, the haynes manual says to torque to a value of 60Nm, but i think this is for ball bearings. Front wheel has a taper bearings in the hub. Install the fully greased inner and outer bearings. Using a high-speed cutting wheel, cut the inner race that is pressed onto the hub assembly. Step 8: Flip it back over and remove the outer race of the wheel bearing. For example, if you have a 12-threads-per-inch front steer axle, turn it back by 1/6 of a turn. Skill and judgment are required to determine when the wheel binds slightly in rotation. This is to set the bearing into position and let the grease find home. i.e. Now that the new bearing is installed, the brake rotor and caliper can be placed back onto the vehicle using a ratchet and the appropriate sockets that were used to remove them. It will now be just shy of finger-tight. Other applications, machine tool spindles for example, are preloaded. When the cold installation is used, the installation sleeve should be used with the installation as far as . If you have a bike with tapered roller bearings, set aside the upper seal and cone, and then drop the lower triple and steering stem out. The inner ring of each bearing is fixed, positioned and clamped and pressed (as such with round nuts). Back in the 70's when we were still working on quite a few older cars, we'd grease the wheel bearings, snug the spindle nut down, spin the hub, back the nut off/retighten finger tight, and adjust it to the nearest spot where the cotter pin fit. Press the bearing into the gob of grease with the heel of your other hand as shown here. Hi Guys, Have not been here for a while as I was busy with my scoot modification for some time. Apply the set-up load, P (based on the tests) through two cap screws, 180 deg apart, Figure 4. Seems to work a treat & dead simples to repeat every time. If the bearings are the taper roller type you should tighten the nut about 30 degrees passed the point when the bearing is seated, turning the wheel as you tighten to ensure the bearing is seated. With the wrench on the nut, loosen about 1/2 turn, gently sling the wrench rotating the nut in a tightening direction allowing gravity to stop the rotation. As the wheel falls away the weight should be over one of the marks. To pre-load the bearings, install the spindle washer and spindle nut onto the spindle with the hub and bearings in place. direct force method. Install the flinger washer (7) on top of the cone (2). Then a 0.009" shim must be installed. If you are planning on installing a wheel on your vehicle, it is important to be aware of the manufacturer recommended torque settings.Using the proper torque helps ensure that the wheel assembly is securely installed. However, if a permanent roadside repair is needed, tighten the nut against the grease-packed wheel bearings as tight as you can with a Channel-lock type of pliers. My new wheels are Ultima Fat Spoke model. Jetta 2005-2010. Taper bearings, pinch up to make sure everythings seated, back off 1/4 turn, spin wheel and check for binding or play, adjust accordingly, lock first nut in position with tab washer and second nut (tab washer bends over a flat on both nuts) Im interested in replacing them because I would like the steering to be tighter. As the bearing is driven up the tapered seat, its radial internal . Put a generous dab of grease in the palm of your (clean) hand and push the grease between the rollers and the cage. Wheel mounted spun a few time to seat the bearing and check for looseness. Re torque to 16lb and then check for play in the hub. - get 5mm bolt loose. The FF-003-MB accepts an OEM Audi centercap, part #4B0 601 170 7ZJ. This forces the grease into the bearing and out the other end. Rock the wheel from side-to-side and top-to-bottom to check for bearing wear. Do the initial torque setting, spin wheel, release & tighten the nut by hand with the tube spanner, then do up the lock nut. While doing this watch the weight. The outer wheel bearing is the one that you greased earlier. While rotating the rotor to ensure proper seating of the rollers, induce pre-load by using a torque wrench to tighten the adjusting nut to 50-foot pounds. That car uses a cartridge type bearing for the front, not individual tapered roller bearings which must be adjusted like on the rear. I am trying to confirm the Torque Settings for my Vauxhall Tigra Rear. Push the pin through the hole on the end of the spindle and through the notches on the nut. On a new set of bearings check and adjust after 200 miles of bedding in. . A second "spin check" should result in a freely rotating assembly indicative of end play. The degree of interference is determined by how far the bearing is driven up onto a tapered shaft seat or an adapter or withdrawal sleeve. If takes more than four pounds, the adjustment is too tight. Then we'd drive the car and double check everything. Will this torque setting be the same, or different for this type of bearing? Once you have no play check the hub preload (attach a spring scale buy hooking it over one of the studs on hub, preload should not exceed around 5lb) if preload is too great then slacken and slightly reduce torque setting. Spin the wheel a couple of turns to reorient the grease in the bearings. Some advantages of tapered roller bearings pertaining to setting include: Longer bearing life, achieved by optimizing bearing settings while meeting application performance requirements. None of the switches on the doors work, but the sunroof works fine, which I find strange. Tapered Roller Bearing Installation Install the cup (3) into the wheel bore. SKF Tapered roller bearings feature a cup and cone assembly. Tapered roller bearings on the front of RWD vehicles are never preloaded. In most other cars with taper roller bearings, the instructions would be to torque to a certain value, spin the wheel by hand, then loosen the nut by some number of degrees (like 1/4 turn) and fit the split pin. Here's how the ol timers do itSpin the hub while tightening the axle nut until it is very firm, stop spinning the hub. Don't overfill with grease either, roller bearings sweep more grease around creating heat. If you back it off one-fourth of a turn, it will move away from the bearing about 0.020 inch - or. 2. Once this wheel is raised, support it on an axle stand. Wheel Bearing and Wheel Nuts. of torque while rotating the wheel to make sure the bearings are seated. If it takes less than two pounds to start the fork moving, the adjustment is loose. They're snugged up with no more than 15 to 20 ft. lbs. The bearings are now adjusted. Then the adjustment nut is loosened 1/6 to 1/4 a turn and locked in place with a new cotter pin. Select the shim thickness. To help, Timken has established an easily measurable three-step adjustment procedure. not so with a Mini. STEP 8. Individual adjustment can accommodate enough tolerance stack-up so that if individual components are . Remove the tire and reinstall the removed components Once the wheel bearing adjustment is pretty good, take off the tire. From my expereince any torque beyond no play is not good for the bearing. The bearing end play is equal to the total indicator movement, which should be between .001 and .005 inches. Common Torque Settings; Wheel Bearing Tightening Procedure. If the fall away is before the weight is over the inch away mark, then the bearings are to loose. Then split the bottom of the pin to the left and right. Then tighten the nut until it's barely snug, perhaps 20-30 INCH pounds. With those bearings the torque established a preload on the bearings. You should notice a slight tightness in the handlebar swing. The R129 front bearings run on much tighter tolerances than other models of that era, so the bearing end float should be set with a dial gauge to 0.01 to 0.02mm max. S. 4 CYL. The general rule of thumb on tapered roller bearings is to tighten the spindle nut firmly (15-20 ft./lbs. . The tapered bearing is tightened by the notched nut under the upper triple clamp. Final tightening of the axle nuts sets all spaoers and bearings of the hub assembly in their correct places. Install the Outer Wheel Bearing. As you spin the nut off the stem, place your other hand under the lower triple to prevent it from falling. on v type engines, the bank of. (83-88 Nm). Step 2: Install the tire. I have replaced my rear wheel bearings on my 92 mini (1 side only, other side was fine)and I am concerned over how tight to do the centre nut. Tools now are readily available to adjust and verify wheel bearings to preload settings. #3 mike. Then undo the nut until you can just feel a tiny amount of play. Ford Kuga Tyre Pressures and Wheel Nut Torque Setting . Rear Wheel Bearings, Torque Setting - posted in Problems, Questions and Technical: Hi All, I cant seem to find a definative answer on here so i thought id ask the question. Jun 23, 2011. #7. Next, reinstall the pin retainer and ensure it fits properly so you can pass the cotter pin. The movement can be adjusted by fastening the locking bolt a little. It almost goes without saying that the positions of all the dustcovers in the hub must be noted and that they must be replaced as before when reassembling. The newer style ball bearings in the front wheel drive cars of today, not so forgiving. While your hands are. As a rule, end play should be about 0.001" to 0.005." My father had a buick where the front wheel bearing got noisy. Replace the wheel and tighten the lug nuts by hand. However in order to ensure proper seating of a conical seat spark plug, it is a good idea to torque the spark plug, loosen it a 1/4 turn and torque it again. You only need to cut halfway through the inner race, taking caution not to cut the hub shaft. This squeezes any excess grease out from between the cone and cup. so that the torque which drives the speedo gearbox tends to tighten the lockring. While oscillating, push the rotor in and read the dial indicator. 97 Ford Explorer - No power windows. 6. There are various methods to obtain the required preload: axial displacement method. Loosen the nut just enough to remove all preload. on the 911 that requires that the nut be tightened bu hand and locked. You may want to invest in some thin, disposable plastic gloves for this job. Place a good-sized dollop of grease in the center of the palm of one hand. Tighten the spindle nut while rotating the break disc counterclockwise to 23-34 Nm (17-24 lb/ft) 7. Have a question regarding wheel torquing sequences. Step 9: Take the hub assembly and place it in a vice. My brother in law changed it out in the driveway. The tapered and ball bearings are worlds apart as far as the tolerable torque specs go. Then the adjusting nut is backed off 16-to-14 turn to the nearest locking hole or sufficiently to allow the wheel to rotate freely with some minimal end-play. the large end face of the rollers must be in contact with the guide flange. I have obtained a Rover tapered roller bearing from Minispares. To fully engage the seal, you'll need to push the hub back far enough. ACCEPTED PRACTICE For decades, the heavy duty truck industry has accepted a recommended wheel end bearing setting of .001-inch to .005-inch of endplay. Tighten the spindle nut to 40Nm (30 lb/ft) 5. Front Wheel bearing Adjustment Hi guys Can anyone give me some advice regarding the front bearing lock nut torque as I have just changed my bearings and when I torque the lock nut up to the desired torque 125 ft lbs(the low end of the scale on my manual) the lock washer tab tears the retaining tag in the stub axle keyway and in such tightens the adjusting nut on the bearing and stuffing the . These forces must be counteracted with a second bearing facing in the opposite. Tighten the spindle nut finger tight (until snug) and then with channel-lock pliers or a crescent wrench, tighten the spindle nut another 1/4 turn or about 15 to 20 ft pounds of torque. I used a punch and tapped the bearing nut to remove any looseness and then a titch more. This allows some end play. The method used depends on, among other things, the application design and the number of bearings to be mounted. But when I tighten the wheel to less torque, but without play, the wheel is rotating more lose than in case when I tighten to specified torque. Now turn the hub five to ten . It is suggested that when installing the bearing, the user can choose the appropriate assembly mode, such as cold or hot, according to the bearing size and working condition. Just do roller bearings up hand tight, whilst rotating the wheel, until all play is gone, then back them off until play is just detected. Increased mounting stiffness, achieved by properly set tapered roller bearings resulting, for example, in better gear contact and longer gear life. After torqueing the large exterior nut on the top triple clamp, it all feels firm. Crazy About Mini's Members You set the bearings the first time you tighten the axle nut. As said, check after a drive that they're not running hot. Axle is 3/4". Vehicle type: front-engine, front- wheel -drive, 5-passenger, 4-door sedan. The conical bearing shells of the outer race should be driven into the shaft with a special aluminum driver. Turn back the adjusting nut. To pre-load the bearings, install the spindle washer and spindle nut onto the spindle with the hub and bearings in place. Then the adjustment nut is loosened 1/6 to 1/4 turn, and locked in place with a new cotter pin. The cup (3) must be fully seated against the step in the bore. The power windows have just suddenly stopped working. This does not mean that loose bearings equals good wheel end performance. Tighten the spindle nut finger tight (until snug) and then with channel-lock pliers or a crescent wrench, tighten the spindle nut another 1/4 turn or about 15 to 20 ft pounds of torque. 4. Sep 6, 2013 (Edited) Ultima wheels - tapered bearings torque procedures. A ball bearing wheel bearing is nowhere as precise as a tapered roller and has less contact area with its inner and outer races, thus the change to TR bearings. Back the axle nut off until the rotor turns smoothly again, then repeat process of turning wheel while tightening the axle nut. Why? On a 12-threads-per-inch spindle, one full turn of the nut will move the bearing 0.083 inch. This chart contains the Ford Kuga optimum air / tyre pressure chart based on vehicles in the United Kindom (UK) contains values in PSI (lbs / Pounds per square inch) with a link to convert to Bar - KPA - PSI. That figure in your book is referring to ball bearing races. They're snugged up with no more than 15 to 20 ft.-lbs. I would like to know what the issues and trade-offs are when designing a tapered roller bearing spindle. Rotate the bearings while applying the load, and measure the gap. but 10nm is basically sod all torgue though so i generally just nip it up very slightly then loosen and do washer movy test, if i cant be bothered to find my torque wrench. Rear Suspension - 6.2 Rear Wheel Bearings - Adjusting Rear Wheel Bearings. edit: paul is right though this does leave a bit of play, I set mine like this many years ago . You just need a flat screw driver, 5mm allen wrench, 17mm socket (wheel bolt), and a jack & jack stand. Any end play should be barely noticeable. When you start to feel friction again, back the axle nut off until the rotor turns smoothly again. Push the outer race against its bear and push it down, e.g. the Haynes manual says 60 lbf ft, but if I do the nut this tight I cant spin the . Torque the adjusting nut to 50 lb-ft. Rotate the wheel hub assembly at the same time. 3. Using the manufacturer recommended torque also helps guarantee that there isn't either too much or too little pressure on any of the assemblies to. then install the metal retainer cap and orient the cap so the holes line up for the cotter pin -install a new cotter pin and bent over the ends -it is important to install a new cotter pin as these. 30 years ago, I had a automotive tech instructor tell me this: Always set wheel bearing with a torque wrench. Installation recommendations for tapered roller bearings. The adjusting nut is then locked in this position. Posts: 919. 6. if there is slack, remove wheel and tighten a little bit more, mount tire and repeat. The nut torque is clamping down on the inner bearing race only. If you look at the spindle, you'll see a black rubbery area at the base this is the seal. There was a warning on the box not to over tighten and it specified a torque. The rear wheel has older version of bearings - tapered roller bearing. 1. - remove hub cap with a flat screw screw driver. Install the cone (2) into the cup (3). with a round nut, or push it down with the end cover of the bearing. When you are satisfied with the adjustment, secure the cotter pin. - remove front tire. This is a loose fit. NOTE: The break disc and hub should be rotated while adjusting front wheel bearing end play .. 4. In manual there is information that axle should be tightened to torque 60-65 ft.-lb. Wheel bearings are usually tighten up to about 25Nm (where they'll get. The cup is comprised of the outer ring and the cone assembly consists of inner ring, rollers, and cage. Make sure the taper of the cup (3) is in the proper orientation. It also needs to be pushed back enough to complete the seal. 8. On some occasions, you may have to loosen or tighten the adjustment before the retainer fits properly. The proper way is to adjust to all play is gone with the wheel ON. On the outside edge of the tire, the movement should not be more than 1/4" inch. The bearings can be set at the time of machine assembly, allowing wider shaft and housing tolerances. tight) and then back off such that it runs easily but without any play. no pressure on the bearing. The plastic cage that the ball bearings are housed in can't take the amount of torque that the steel tapered bearings can. Then install the cotter key. When adjusting tapered roller bearings against each other, the bearings must be rotated so that the rollers assume their correct position, i.e. Loosen the adjusting nut by one full turn or until it's loose. Remove the upper triple tree while continuing to support the lower. frictional moment method. Garage. Sealing, mounting and dismounting. This means achieving an endplay between .001 inches and .005 inches. Grasp the rotor at 3 o'clock and 9 o'clock and begin oscillating the rotor back and forth. You may have to take off the wheel to remove the trim: put the wheel back on before starting adjustment. Clearance- cooler running, maximum load capacity, maximum life. This is fall away. Loosen the spindel nut 1/2 turn. Install the adjusting nut (making sure the "dowel" is pointing outward), torque to 100 ft lb, spin the hub a couple turns in each direction to seat the bearing, back off the nut about 1 turn, tighten the nut again to 50 ft lb., spin the hub again, then back off the adjusting nut 1/4 turn. Do this all around the circumference of both bearings. MANUAL. Wheel nuts will be 90-100Nm. Another option is to use a cone-shaped wheel bearing packing tool, which encloses the bearing in two concentric cones. Don't change the wheel bearing if it doesn't make noise. With the scale at a slight angle to the fork, apply a bit of pressure. SOURCE: Torque setings if it is a solid bearing do it up as tight as you can.if it is a tapered bearing do it up untill the nut is touching the bearing check the hub for play if you have got play do the nut up a bit more until the play is gone in the hub.make sure you do not over tighten the bearing or the wheel will not turn freely.the wheel needs to spin with no drag. With the forks aimed straight ahead, wrap the twine around a fork leg and tie it off to the scale. For bearings with a tapered bore, inner rings are always mounted with an interference fit. I don't think it's the relay, since the sunroof is working, and I verified this by yanking out the relay and the sunroof became inoperable. If you have to remove the wheel, loosen the wheel nuts before raising it. If the shaft does not spin freely, the bearings are preloaded. The following is intented to be a rough guide for tightening up the tapered wheel bearings commonly found on 70, 80 and 100 series (fronts only) Land Cruisers but in reality can be applied to most 4x4s - they key thing is to make sure the bearings are bedded in properly. So it just goes to show you how forgiving tapered roller bearings are. Under the first spin check, if the shaft spins freely, end play is present (Figure 8) and the bearings are properly set. Take a gob of wheel-bearing grease and place it in the palm of your left hand. Put flat tabbed washer back on. Loosen the spindle nut two turns. of torque while rotating the wheel to make sure the bearings are seated. Now with just a light slow push on the end of one hand grip, move the wheel until it tips over off center on it's own. Hello, Automotive tapered roller wheel bearings are often recommended to run with a little clearance. By adjusting one single row tapered roller bearing against a second tapered roller . Snug the adjusting nut tight while turning the wheel or hub 10 complete revolutions. Firmly press the larger end of the bearing into the pile of grease four or five times and rotate the bearing a bit. The bearing is preset internally like someone else said. ), spin the wheel a couple of times, and then back off until the nut turns freely. If you have play then repeat step one. The torque listed sounds correct for a FWD axle nut. Rear Wheel Bearing Torque Settings - posted in Problems, Questions and Technical: Hi I am changing the rear wheel bearing of my mini. 97 Explorer, RWD 5.0L V8. Now turn the hub ten revolutions. he's talking about the real ford escort If there is any play in the bearing adjustment the inner and outer race faces no longer are parallel and the contact area of the roller diminishes and moves to opposite ends, 180 . Under radial loading, a tapered bearing is subjected to both radial force and force in the axial direction.
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