Image 7. Motor viewed from right side
2.12 Crankshaft
The crank is made from several metal parts, that were manufactured hydraullically under several
tons of pressure. These parts consist of the two strokediscs, the two crank pivots and the
strokepivot on which the connecting rod is installed on a doublerowed rollerbearing. A polished
seperator disc seperates the two rows of rollers and thus keeps an ideal tracking and also insures
sufficient lubrication even at high revolutions. At the top end of the connecting rod there is a
bronze bushing into which the piston bolt is installed.
The crank is installed into the crankcase by one ball bearing on the right and two ballbearings on
the left. The necessary pressuretightness of the crankendings at the bearings is achieved by spring
pressured crank seals on each side.
Image 8. Crank with connecting rod and
piston
2.13 Crankcase
The enginecase is sliced vertically through the middle. The front section contains the crankcase
and the rear section the transmissioncase.The crankcase picks up the crank and carries the
cylinder. The two halfes of the engine case are held together by screws . The seperation surfaces
of both halfes of the engine case should have minor amounts of a fluid sealer applied to them prior
to closing the enginecase. Two lightmetal cast lids close the exposed areas around the sides of the
enginecase.
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General