GENERAL INFORMATION 23 @ Spring Dust lip .. e. While the housing is still hot, install the new bear- ing(s) into the housing. Install the bearings by hand, if possible. If necessary, lightly tap the bearing(s) into the housing with a socket placed on the outer bearing race. Do not install new bearings by driving on the inner bearing race. Install the bearing until it seats completely. b. Remove the housing from the oven or hot plate and hold onto the housing with a kitchen potholder, heavy gloves or heavy shop cloths-it is hot. SEALS NOTE A suitable size socket and extension works well for removing and installing bearings.
Seals (Figure 57) are used to contain oil, water, grease or combustion gasses in a housing or shaft. Improper re- moval of a seal can damage the housing or shaft. Improper installation of the seal can damage the seal. Note the fol- lowing: 1. Prying is generally the easiest and most effective method of removing a seal from a housing. However, al- ways place a rag underneath the pry tool to prevent dam- age to the housing. 2. Pack grease in the seal lips before the seal is installed. 3. Always install seals so that the manufacturer's num- bers or marks face out. 4. Install seals with a socket placed on the outside of the seal as shown in Figure 58.
Make sure the seal is driven squarely into the housing. Never install a seal by hitting against the top of the seal with a hammer. c. Hold the housing with the bearing side down and tap the bearing out. Repeat for all bearings in the housing. d. Prior to heating the bearing housing, place the new bearing in a freezer, if possible. Chilling a bearing will slightly reduce its outside diameter, while the heated bearing housing assembly will be slightly larger due to heat expansion. This will make bear- ing installation much easier. NOTE Always install bearings with the manufac- turer s mark or numberfacing outward. Tables 1·4 are on the following pages.