Discovery II
GENERAL INFORMATION
03-8
Oil Seals
General
Always renew oil seals which have been removed
from their working location (whether as an individual
component or as part of an assembly). NEVER use
a seal which has been improperly stored or handled,
such as hung on a hook or nail.
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Carefully examine seal before fitting to ensure
that it is clean and undamaged.
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Ensure the surface on which the new seal is to
run is free of burrs or scratches. Renew the
component if the original sealing surface cannot
be completely restored.
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Protect the seal from any surface which it has to
pass when being fitted. Use a protective sleeve
or tape to cover the relevant surface.
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Lubricate the sealing lips with a recommended
lubricant before use to prevent damage during
initial use. On dual lipped seals, smear the area
between the lips with grease.
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If a seal spring is provided, ensure that it is fitted
correctly. Place lip of seal towards fluid to be
sealed and slide into position on shaft. Use
fitting sleeve where possible to protect sealing
lip from damage by sharp corners, threads or
splines. If a fitting sleeve is not available, use
plastic tube or tape to prevent damage to the
sealing lip.
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Grease outside diameter of seal, place square
to housing recess and press into position using
great care, and if possible a 'bell piece' to
ensure that seal is not tilted. In some cases it
may be preferable to fit seal to housing before
fitting to shaft. Never let weight of unsupported
shaft rest in seal.
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Use the recommended service tool to fit an oil
seal. If the correct service tool is not available,
use a suitable tube approximately 0.4 mm
(0.015 in.) smaller than the outside diameter of
the seal. Use a hammer VERY GENTLY on drift
if a suitable press is not available.
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Press or drift the seal in to the depth of its
housing with the sealing lip facing the lubricant
to be retained if the housing is shouldered, or
flush with the face of the housing where no
shoulder is provided. Ensure that the seal does
not enter the housing in a tilted position.