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1. Pack the roller bearings in high-temperature grease. A good method of keeping the bearing in place is to fill the bearing cap with grease. WARNING 5. Press the caps fully into position by placing a small socket on one bearing cap. Tighten the vise until the cap is pushed in far enough to install the snap ring. With one snap ring in place, use the socket to force the other cap into position. Install its snap ring. After assembly, check the action of the U-joint. Swing it back and forth into various positions. The joint should move freely, without binding. Double-check that all snap rings have been installed properly. Once the U-joint has be checked and is working properly, reinstall the drive shaft back into the vehicle as follows: 1. Wipe off the outside slip yoke and place a small amount of grease on the internal splines. Align the marks and slide the yoke into the rear of the transmission. 2. Push the slip yoke all the way into the extension housing and position the rear U-joint at the differential. 3 . Pull back on the drive shaft and center the rear universal properly. Check your rear alignment marks. 4. Install the U-bolts, bearing caps, or yoke bolts to secure the rear universal joint. 5. With the rear universal joint secured, lower the vehicle to the ground. 6. Test-drive the vehicle for proper operation. Check for unusual noises, vibration, and other abnormalities. Constant Velocity Joint Service Once the CV joint is disassembled, obtain a CV joint repair kit (usually includes new joint components, grease, boot, and bootstraps). When the joint is being assembled, refer back to the service manual for detailed directions. WARNING After reassembling the CV joint, fit the boot over the joint. Make sure the boot ends fit into their grooves. Install the bootstraps. Do not overtighten the straps, as they may cut the boot or break. Center Support Bearing Service When a faulty bearing is suspected, it should be inspected for wear and damage. If the rubber support shows any evidence ofhardening, cracking, or tearing, it should be replaced. Should you encounter a faulty support bearing, replacement procedures are usually limited to separating the drive shafts, unbolting the bearing support from the frame or cross member, and sliding the bearing and support assembly from the shaft. If only the bearing is available from the parts room, disassemble the unit by gently prying the bearing out of the rubber support. Next, remove the dust shield from the bearing. All parts that are to be reused should be cleaned. When the bearing is being replaced, some manufacturers recommend that waterproof grease be placed on both sides of the bearing, not for a lubricant but to exclude water and dust from the bearing. Install the dust shield and press the new bearing into the support. Before securing the bearing support to the frame or cross member, check the service manual to determine if shims are required for alignment purposes. When reassembling support bearings, you should exercise care to ensure that proper alignment of the drive line is maintained. This will prevent abnormal wear of the universal joints. |
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