CAUTION: Special tools have been developed for removing most types of bearings; they should be used whenever indicated.
To ensure long service life of the units, follow the instructions below when removing and installing bearings:
- All traces of grease must be removed. Use special compounds for washing. During assembly/disassembly operations, maintain absolute cleanliness in the workplace.
- Carefully inspect the rolling elements, raceways, outer cylindrical surface of the outer ring and inner cylindrical surface of the inner ring. Bearings must be replaced if traces of friction are found in the specified areas, as this indicates wear.
- Hold the inner bearing race between the index finger and thumb of one hand. Use the other hand to rotate the outer race. The rotation should not be accompanied by any sticking or extraneous sounds. Now clamp the outer race and rotate the inner race. DO NOT spin the bearing too quickly.
- While holding the inner ring, rotate the outer ring smoothly in a reciprocating motion to ensure that rotation is not obstructed. The bearing must be replaced if the ring does not rotate smoothly enough.
- Check the bearing for signs of bluing or overheating.
- Lubricate the bearing with the recommended lubricant.
- Inspect the shaft journal and the seat in the housing. Tempered colors or other traces indicate a weakening of the bearing seat.
- Before installing the bearing, clean the shaft journal and the housing bore for the bearing from dirt and burrs.
- If one of the bearings in a pair shows signs of wear, overheating, etc., it is recommended to replace both bearings. An exception is when there is a suspicion that one of the bearings was defective during installation, was installed incorrectly, or that the malfunction was caused by a failure of the seal.
- Never reinstall a bearing without first ensuring that it is fully functional.
When mounting a bearing on a shaft, apply force to the inner ring. When mounting a bearing in a housing bore, apply force to the outer ring.
CAUTION: Special tools have been developed for removing most types of bearings; they should be used whenever indicated.
If the bearings are grease lubricated, fill the space between the bearing and the outer seal with the recommended grade of grease before installing the seal.
CAUTION: When using a waxed seal (dry fit), be especially careful not to contaminate the running surface of the seal with grease.
Always mark the parts of bearings that can be disassembled (e.g. tapered bearings) when disassembling to avoid confusion during assembly. Do not attempt to replace rollers without changing the outer race. The entire bearing must be replaced.
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