Liquid gasket, non
-
permanent locking agent
Lubrication
Joints and joint faces
Assemble joints dry unless otherwise specified in this
Manual.
If gaskets and/or jointing compound is recommended
for use; remove all traces of old jointing material prior
to reassembly. Do not use a tool which will damage the
joint faces and smooth out any scratches or burrs on
the joint faces using an oil stone. Do not allow dirt or
jointing material to enter any tapped holes.
Gaskets, 0-rings
Do not re-use a gasket or O-ring once it has been in
service. The mating surfaces around the gasket should
be free of foreign matter and perfectly smooth to avoid
oil or compression leaks.
1 GENERAL INFORMATION
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Engine wear is generally at its maximum while the
engine is warming up and before all the rubbing
surfaces have an adequate lubricative film. During
assembly, oil or grease (whichever is more suitable)
should be applied to any rubbing surface which has
lost its lubricative film. Old grease and dirty oil should
be cleaned off. This is because used lubricants will
have lost some lubricative qualities and may contain
abrasive foreign particles.
Use recommended lubricants. Some oils and greases
in particular should be used only in certain applications
and may be harmful if used in an application for which
they are not intended. This manual makes reference to
molybdenum disulphide grease in the assembly of
certain engine and chassis parts. Always check
manufacturer recommendations before using such
special lubricants.
Follow manufacturer's directions for cleaning and
preparing surfaces where these compounds will be
used. Apply sparingly as excessive amounts of sealer
may block engine oil passages and cause serious
damage.
Prior to reassembly, blow through any pipes, channels
or crevices with compressed air.
WARNING: To prevent injury, always use
eye, face and ear protection when using
compressed air. Always wear protective gloves if
the compressed air is to be directed in proximity to
the skin.
Screw threads
Metric threads to ISO standard are used.
Damaged nuts, bolts and screws must always be
discarded.
Castellated nuts must not be slackened back to accept
a split-pin, except in those recommended cases when
this forms part of an adjustment.
Do not allow oil or grease to enter blind threaded
holes. The hydraulic action on screwing in the bolt or
stud could split the housing.
Always tighten a nut or bolt to the recommended
torque figure. Damaged or corroded threads can affect
the torque reading.
Unless specified, threaded fixings must always be
fitted dry (no lubrication).
WARNING: Never lubricate a thread
unless instructed to do so.
When a thread of a fixing is lubricated, the thread
friction is reduced. When the fixing is tightened,
reduced friction will cause overtightening and
possible fixing failure.
A fixing which fails in service could cause
component detachment leading to loss of control
and an accident.
1.6
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