Bukh DV36/48, Руководство по ремонту

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009W2329-R01
C11
Valve springs
Six identical springs for inlet and exhaust valves, respectively, are fitted in the cylinder head.
The springs are identical in both ends, and therefore fitting up or down is of no importance.
The springs are locked in their position in proportion to the valve stems by means of two
conical halves for each valve spring and guided by a guide for valve spring and a
corresponding disc, respectively.
The valve springs are removed by compressi ng the valve springs and removing the c onical
locking halves with s pecial tools or the like so the valves are cut off fro m following the
movement of the springs.
When refitting the valve springs, make sure t hat the conical loc king halves are correctly
placed in their trace on the va lve stems. This can be done by knocking gently with a plastic
hammer on top of the valve stem while the cylinder head is lifted from the file bench so that
the valve heads can move so as to be clear of the valve seats.