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LUBRICARE AND BEARING SERVICE
SECTION l-C
BEARING SERVICE
(BALL AND ROLLER)
BEARING SERVICE
1-11
The
instruct ions
in this Section cover
removal,
installation, cleaning and inspection of all ball and roller bearings
used in the various units of the vehicle. These instructions must be carefully followed to avoid failure of bearings after
any repair work in which they are involved.
CONTENTS OF SECTION l-C
Paragraph
Subiect
Page
1-11
Removal and Installation of Bear-
ings
1-11
1-1 2
Care of Bearings Before Cleaning 1-12
1-13
Cleaning Bearings
"
1-12
Paragraph
Subject
Page
1-14
Inspection of Bearings After
Cleaning
1-13
1-15
Care of Cleaned and New
Bear-
ings
1-13
Bulletin No.
Page
No.
SERVICE BULLETIN REFERENCE
SUBJECT
1-11 REMOVAL AND INSTALLATION
Bearings are frequently damaged so that they
fail to give satisfactory service due to improper
methods used in removal and installation. The
same general precautions apply to both removal
and installation-these are as follows:
a. Cleanliness
Absolute cleanliness is essential in the hand-
ling of all units in which ball or roller bearings
are installed. Before any such unit is opened
for inspection or removal of parts, all loose dirt
should be washed off the exterior to avoid
getting abrasive substances into the bearings.
Removed bearings must be handled so as to
avoid contamination as described below
(par.
1-12 and 1-15.) During the installation the
housing and all interior parts, as well as the
tools used for assembly, must be kept abso-
lutely clean. If a partially assembled unit is to
be left standing for any time, or over night,
cover it with clean cloths or paper to exclude
dust.
b. Proper Tools
Proper tools must be used during removal
and installation to avoid damage to bearings
and adjacent parts. Special tools are designed
for removal and installation of some bearings
and these should be used where specified in
instructions. When special tools are not avail-
able, an arbor press should be used, wherever
it is adaptable, to apply pressure and avoid
shock.
Never hammer on a bearing as the hardened
steel may chip or crack. Use of a hammer and
drift
is.
bad practice. The drift may slip and
damage the separator or shield and there is
always the danger of cocking the bearing or
cracking the tight fitted race.
If
a hammer and
drift must be used the drift must be of soft
material, such as brass, and properly shaped to
assure good bearing against the tight fitted
race. A
clean
piece of tubing of proper diameter
to bear all around the race is preferable to a
solid drift.
c. Application of Pressure
Bearings may be seriously damaged by
im-
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