thoroughly with detergent and water.
Rinse and rewash the cases as
required to remove all traces of oil and
other chemical deposits
a. Heat the housing to approximately 100℃ (212°F) in an oven or on a hot plate. An
easy way to check that it is the proper temperature is to place tiny drops of water
on the housing; if they sizzle and evaporate immediately, the temperature is
correct. Heat only one housing at a time.
CAUTION
Do not heat the housing with a propane
or acetylene torch. Never bring a flame
into contact with the bearing or
housing. The direct heat will destroy
the case hardening of the bearing and
will likely warp the housing.
b. Remove the housing from the oven or hot plate, and hold onto the housing with
welding gloves. It is hot!
NOTE
Remove and install the
bearings with a suitable
size socket and extension.
c. Hold the housing with the bearing side down and tap the bearing out. Repeat for
all bearings in the housing.
d. Before heating the bearing housing, place the new bearing in a freezer if possible.
Chilling a bearing slightly reduces its outside diameter while the heated bearing
housing assembly is slightly larger due to heat expansion. This makes bearing
installation easier.
NOTE
Always install bearings with the
manufacturer’s mark or number
facing outward.
e. While the housing is still hot. Install the new bearing(s) into the housing. Install the
bearings by hand. if possible. If necessary, lightly tap the bearing(s) into the
housing with a driver placed on the outer bearing race (Figure 45). Do not install
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