33
COMPILER TECO/ATI ENDORSEDDATE
01.08.2003
REG. CODE
1-5302-620
MODEL N°
50902
DATE OF ISSUE
08-03
REVISION 00
XIII
53
54
55
56
ENGINE ASSEMBLY
Crankshaft preparation
The insertion of the main distribution gear onto the crankshaft must
be carried out while hot. Heat by means of dry heating or an oil bath
at 70/80 °C (fig. 53).
Upper crankcase preparation
1.Insert accelerator internal lever onto crankcase taking care not
to damage the oil seal O-Ring.
2.Fit interchangeable tappets into housings on crankcase.
3.Camshaft assembly (fig. 54): in order to assemble the shaft
correctly, the cams must be introduced, without applying force,
along the grooves inside the crankcase.
4.Mount governor lever and insert lever fulcrum pin taking care not
to damage the oil seal rings (fig. 55). The lever should be able
to effect the complete stroke without strain.
Insert spring between governor lever and accelerator.
5.Insert main bearings into respective housings and spread with
oil slightly.
The three main bearings are identical and interchangeable.
6.Fit rubber gaskets and O-Rings between crankcases taking
care to insert same properly into respective grooves so as to
prevent oil leaks between the contact surfaces (fig. 56).
It is advisable to spread a bit of rubber adhesive round the
edges of the rubber gasket for better seal.
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