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Fitting the heads

First, line up the two reference marks in the bevel gears. Place the head on the four studs and make sure that the engagement in the vertical shaft corresponds with the crankcase. When the studs appear from the upper supporting surface of the nuts, install the washers and tighten the nuts. The tap the head carefully until it seats properly. Tighten the nuts with a 17 mm polygon wrench. Before the assembly is completed, make sure that there is a Seeger ring near the coupling in the stem of the vertical conical gear.

Figure 61

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