TRUCK SERVICE MANUAL
BALL AND ROLLER BEARING MAINTENANCE
Important-In order to assure bearings being free of rust, dirt,
or damage, the following procedure relative to handling, and
installation is recommended:
Cleansing and Lubrication of Bearings
Use clean kerosene or Stoddard Solvent in a
Use clean, lint free rags or towels, and never
use waste. Lint from waste may enter
equipment is available, which will facilitate
bearing cleansing. )
Dip bearing in kerosene several times, rocking
bearing race rings slowly to dislodge grease
from ball sockets.
Spin bearing while repeatedly dipping into
kerosene. Continue operation until bearing
runs smoothly and quietly or until it is clean
and ready for inspection.
If bearing is found satisfactory, dip in a neutral
oil or thin grease and wrap. (Note: Suitable
wheel bearing grease packer equipment is
available, which will produce excellent results.
Removal and Installation of Bearings
Shafts or housings must be clean and free
Use properly arranged press plates or arbors
for installation or removal of bearings.
In pressing bearings into place the pressure or
load should be so applied that it will not be
transferred through the balls.
For example, if bearing is applied to or
removed from shaft, pressure should be
applied to inner bearing cone.
If bearing is being installed in or removed from
a housing or case bore, pressure should be
applied to outer bearing cup.
Do not hammer on bearings. Lead or babbitt
hammers may chip off and allow pieces to
lodge in bearing. Wooden hammers may
leave splinters in bearings. Steel hammers
will chip, crack, or Brinell the bearing.
If necessary to heat bearing for installation or
removal, use a light or medium-weight oil
heated to 225°F. Allow bearing to stand in
this oil until thoroughly heated.
Upon installation of bearing, lubricate bearing
seat with light oil.
Apply steady pressure. If bearing sticks or
binds, ascertain cause. Correct fault and then
proceed with operation. A bearing started in a
cocked position will bind.
Burrs in housings or on shafts will cause
severe binding and sticking.
Bearing should rest squarely against shoulder
or in recess.
Bearing should roll freely after installation
unless individual specifications call for a
preload. Test bearing for bind or drag by
holding bearing outer race between thumb and
finger, and test for side play. (A radial
clearance of . 0001" will produce side play of
approximately .005" to .006") Shafts mounted
installation unless individual specifications call
for a preload. Test by revolving shaft
Intermixing of Component Parts -Roller Bearings
Wherever possible, intermixing of roller bearing
component parts should be discouraged. Therefore, where
possible, IH parts should be used to service IH assemblies.
CTS-2128-L Page 5
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