Fitting the pistons and gudgeon pins
First heat the pistons to 1200 to 1400F.
Using a pin, fit the gudgeon pin. Once the
gudgeon pin has been fitted, tighten the
two stop rings. Take care to fit the pistons
in the correct position, with the one for the
vertical cylinder with the exhaust valve in
Fitting the cylinders
Position the gasket at the cylinder base.
Place the piston rings so that the union
slits are atabout 1200 between each other.
Slowly insert the piston in the cylinder,
keeping the rings closed with your hand,
being careful not to damage the rings. The
figu re shows the method for fitting the
vertical cylinder. The same system applies
to the horizontal cylinder.
Fitting the rubbers for oil flow in the head
This figure illustrates the method of
installing the rubbers in the
oil ducts. The
smallest is placed in the delivery hole and
the others in the recovery holes. It is best
to fit new rubbers every time the head is