Man E 2842 LE 302, Operating Instructions Manual

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Instructions
52
Important instructions which concern technical safety and protection of persons are em-
phasised as shown below.
Danger:
This refers to working and operating procedures which must be complied with in
order to rule out the risk to persons.
Caution:
This refers to working and operating procedures which must be complied with in
order to prevent damage to or destruction of material.
Note:
Explanations useful for understanding the working or operating procedure to be
performed.
Fitting flat seals / gaskets
Flat seals / gaskets are often inserted with sealing agents or adhesives to make fitting
them easier or to achieve better sealing. Flat seals may slip in operation due to the “sew-
ing-machine” effect, in particular if they are used between parts with different rates of lin-
ear expansion under heat (e.g. aluminium and cast iron), and leaks may then occur.
Example:
the cap of the front crankshaft seal. If a sealing agent or an adhesive is used here the flat
seal will move inwards in the course of time as a result of the different expansion rates of
the materials. Oil will be lost, for which the shaft seal may be thought to be responsible.
Flat seals / gaskets can be fitted properly only if the following points are ob-
served:
D
Use only genuine MAN seals / gaskets
D
The sealing faces must be undamaged and clean
D
Do not use any sealing agent or adhesive − as an aid to fitting the seals a little grease
can be used if necessary so that the seal will stick to the part to be fitted
D
Tighten bolts evenly to the specified torque