d. Remove the bearing from its wrapper and secure it
with a piece of heavy wire bent to hold it in the pot.
Hang the bearing in the pot so it does not touch
the bottom or sides of the pot.
e. Turn the heat on and monitor the thermometer.
When the oil temperature rises to approximately
120° C (248° F), remove the bearing from the pot
and quickly install it. If necessary, place a socket on
the inner bearing race and tap the bearing into place.
As the bearing chills, it will tighten on the shaft, so
installation must be done quickly. Make sure the
bearing is installed completely.
2. Follow this step to install a bearing in a housing. Bear-
ings are generally installed in a housing with a slight inter-
ference fit. Driving the bearing into the housing using
normal methods may damage the housing or cause bear-
ing damage. Instead, heat the housing before the bearing
is installed. Note the following:
CAUTION
Before heating the housing in this proce-
dure, wash the housing thoroughly with de-
tergent 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° C (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 di-
rect 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 a kitchen potholder,
heavy gloves or heavy shop cloth. It is hot!
NOTE
Remove and install the bearings with a suit-
able 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 will make bearing in-
stallation easier.
NOTE
Always install bearings with the manufac-
turer’s mark or number facing outward.
GENERAL INFORMATION
25
1
53
54
Bearing
Shaft
Socket
Shaft
Bearing
55
Bearing
Housing
Spacer
Shaft
Driver