20 CHAP TE R ONE I II Bearing r--- p l,lller ~ 100 0 00 0 1 F,t~ ~ ;;;;- --1 1- Spac er +-- --1- 1- Shaft I r p :1' l~~~~l "'f >= ~tt - Beaarlng 3. Step 1 describes how 10install a bearing in a case half and over a shaft. However, when installing a bearing over a shaft and into a housing at the same time, a snug fit will 0 F]) in the oil. Support the thermome ter so it does not rest on the bottom or side of the pot. d. Remove the bearing from its wrapper and secure it [248 be required for both outer and inner bearing races. In this situation, a spacer must be installed underneath the driver tool so that pressure is applied evenly across both races. Sec Figure 56.
If the oute r race is not supported as shown in Ffgu re 56, the balls will push against the outer bearing track and damage it. with a piece of heavy wire bent to hold it in the pot. Hang the bearing in the pot so that it does not touch the bottom or sides of the pot. e. Tum the heat on and monitor the thermometer. When the oil temperature rises to approxi mately 120 0 C (248 0 F), remove the bearing from the pot and quickly install it. lf'nccessary, place a socket on the inner bearing race and tap the bearing into place. As the bearing cools, it will tighten on the shaft so work quick ly when installing it. Make sure the bear- ing is installed all the way. 2.
Installing a bearing in a housing -Bearing s are gener- ally installed in a housing with a slight interference fit. Driving the bearing into the housing using normal meth- ods may damage the housing or cause bearing damage. In- stead, the housing should be heated bef ore the bearing is installed. Note the following: Sh rink Fit 1. Ins/a iling a bear ing over a shaft - If a tight fit is re- quired. the bearing inside diameter will be smaller than the shaft. In this case, driving the bearing on the shaft us- ing normal methods may cause bearing damage. Instead, the bearin g: should be heated before installation. Note the followi ng: a.
Secure the shaft so that it can be ready for bearing installat ion. b. Clean the bearing surface on the shaft of all residue. Remove burrs with a file or sandpaper. c. Fill a suitable pot or beaker with clean mineral oil. CAUTION Before heating the housing in thisprocedure to remove the bearings, wash the housing thoroughly with detergent and water. Rinse 0 C Place a thennomctcr (rated highe r than 120