GENERAL INFORMATION 19 I T , I , l. If using a puller to remove a bearing on a shaft, care must be taken so that shaft damage does not occur. Al- ways place a piece of metal between the end of the shaft and the puller screw. In addition. place the puller arms next to the inner bearing race. See Figure SO . 2. If using a hammer to remove a bearing on a shaft. do not strike the hammer directly against the shaft. Instead. use a brass or alum inum rod between the hammer and shaft (Figure 51). In addition. support both bearing races with wooden blocks as sho w n in f igure 51. 3. The most ideal method of bearing removal is with a hy- draulic press.
However, certain procedures must be fol- lowed or damage may occur to the bearing, shaft or bearing housing. Note the following if using a press: a. Always support the inner and oute r bearing races with a suitable size wood or aluminum ring (Figure 52). If only the outer race is supported. pressure ap- plied against the bearings and/or the inner race will damage them. b. Always make sure the press ram (Figure 52) aligns with the center of the shaft. If the ram is not cen- tered, it may damage the bearing and/or shaft. c. The moment the shaft is free of the bearing, it will drop to the floor. Secure the shaft to prevent it from falling. Be aring Installation 1.
When installing a bearing in a housing. pressure must be applied to the outer bearing race (Figure 53). When in- stalling a bearing on a shaft. pressure must be applied to the inner bearing race (Figure 54). 2. When installing a bearing as described in Step 1. some type of driver will be required. Never strike the bearing di- rectly with a hammer or the bearing will be damaged. A piece of pipe or a socket with an outer diameter that matches the bearing race will be required. Fig ur e SS shows the correct way to use a socket and hammer when installing a bearing.