Freelander Service Procedures
GENERAL INFORMATION
03-8
Ball and roller bearings
General
When removing and installing bearings, ensure that
the following practices are observed to ensure
component serviceability:
l
Remove all traces of lubricant from the bearing
under inspection by cleaning with a suitable
degreasant; maintain absolute cleanliness
throughout operations.
l
Conduct a visual inspection for markings on
rolling elements, raceways, outer surface of
outer rings or inner surface of inner rings. Reject
any bearings found to be marked, since marking
in these areas indicates onset of wear.
l
Hold inner race of bearing between finger and
thumb of one hand and spin outer race to check
that it revolves absolutely smoothly. Repeat,
holding outer race and spinning inner race.
l
Rotate outer ring gently with a reciprocating
motion, while holding inner ring; feel for any
check or obstruction to rotation. Reject bearing
if action is not perfectly smooth.
l
Lubricate bearing with generous amounts of
lubricant appropriate to installation.
l
Inspect shaft and bearing housing for
discoloration or other markings which indicate
movement between bearing and seatings.
l
Ensure that shaft and housing are clean and
free from burrs before fitting bearing.
l
If one bearing of a pair shows an imperfection, it
is advisable to replace both with new bearings;
an exception could be if the faulty bearing had
covered a low mileage, and it can be
established that damage is confined to only one
bearing.
l
Never refit a ball or roller bearing without first
ensuring that it is in a fully serviceable condition.
l
When hub bearings are removed or displaced,
NEW bearings must be fitted; do not attempt to
refit the old hub bearings.
l
When fitting a bearing to a shaft, only apply
force to the inner ring of the bearing. When
fitting a bearing into a housing, only apply force
to the outer ring of the bearing.
l
In the case of grease lubricated bearings (e.g.
hub bearings) fill the space between bearing
and outer seal with the recommended grade of
grease before fitting seal.
l
Always mark components of separable bearings
(e.g. taper roller bearings) when dismantling, to
ensure correct reassembly. Never fit new rollers
in a used outer ring; always fit a complete new
bearing assembly.
