Instructions Important instructions which concern technical safety and protection of persons are emphasised 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 “sewing-machine” effect, in particular if they are used between parts with different rates of linear 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 observed: 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. 2