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All the maintenance operations and repairs described in this manual must be carried out by the
MF assistance network only, in strict compliance with the indications given and using spe-
cial tools if necessary.
Anyone who carries out the described operations without strictly complying with the instruc-
tions becomes personally responsible for any consequent damage.
Battery
Before proceeding with any work, disconnect and insulate the negative battery cable unless other instruc-
tions are given for the specific operation required (for example: an operation where the engine must be run-
ning). After the operation has been terminated, detach this cable in order to finish the work.
Adjuster shims
Whenever adjustments are made, select the adjuster shims by measuring them one by one with a
micrometre and then adding the values gauged: do not trust in the erroneous measurement of the complete
pack or in the nominal value given for each ring.
Spinning shaft seals
Comply with the following instructions to correctly mount the spinning shaft seals:
-
before they are mounted, allow the seals to soak for at least half an hour in a bath of the same type of
oil as that they will be sealing;
-
thoroughly clean the shaft and make sure that its operating surfaces are not damaged;
-
position the sealing lip towards the fluid. If the lip is the hydrodynamic type, the direction in which the
scoring points (considering the direction in which the shaft spins) must tend to make the fluid flow
towards the internal part of the seal;
-
spread a film of lubricant (oil is preferable to grease) on the sealing lip and fill the gap between the seal-
ing lip and dust guard lip of double-lipped seals with grease;
-
fit the seal into its housing by pressing or use a punch with a flat contact surface. Never hit the seal with
a hammer or mallet;
-
when a seal is mounted, make sure that it is inserted perpendicular to its housing. After mounting, make
sure that it touches the supporting ridge (if applicable);
-
to prevent the seal lip from being damaged by the shaft, fit an adequate guard whilst the two parts are
being assembled.
O-ring toroid seals
Lubricate the o-ring seals before they are fitted into their housings to prevent them from rolling around
themselves and becoming twisted as they are mounted, something that would compromise their sealing
ability.
Bearings
It is advisable to proceed in the following way when mounting bearings:
-
heat them to 80 − 90 °C before fitting them on to their respective shafts;
-
cool them before externally fitting them into their housings.
Spring pins
When mounting split tube spring pins, make sure that their notches point in the direction of the force exer-
cised on the pin itself.
Spiral spring pins do not need to be set in any direction when mounted
P/N 3681774M1
Edition 01-2006
SECTION 100 - GENERAL INFORMATION
GENERAL INSTRUCTIONS
IMPORTANT WARNING
100-7
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