PIAGGIO Beverly 500 i.e., Руководство по ремонту

Страница: 117 / 382

Refitting the piston rings
- Place the scraper ring spring on the piston.
- Install the scraper ring keeping the opening op-
posed to the spring junction and with the writing
"top" facing the piston crown. The chamfered side
of the oil scraper ring should always be facing the
piston crown.
- Fit the second lining with the identification letter
or the writing "top" facing the piston crown. In any
case, the step must be facing opposite the piston
crown.
- Install the first compression lining in the direction
imposed by the housing.
- It is advisable to use a fitter to facilitate the in-
stallation of the linings.
N.B.
THE TWO PISTON RINGS ARE MADE WITH A TAPERED
CYLINDRICAL CONTACT CROSS-SECTION. THIS IS TO
ACHIEVE A BETTER BEDDING.
- Misalign the lining openings at 120° as shown in the figure.
- Lubricate the components with engine oil.
- The engine uses the first compression lining with an L section.
Refitting the cylinder
- Insert the cylinder base gasket with the thickness
determined above.
- Using the fork and the ring clamp, fit the cylinder
as shown in the figure.
N.B.
BEFORE FITTING THE CYLINDER, CAREFULLY BLOW
THE LUBRICATION DUCT AND LUBRICATE THE CYLIN-
DER LINER. CHECK THE PRESENCE OF THE TWO REF-
ERENCE DOWELS.
Specific tooling
020468Y Piston assembly band
020512Y Piston fitting fork
Inspecting the cylinder head
- Using a trued bar and a feeler gauge check that the cylinder head surface is not worn or distorted.
Characteristic
Beverly 500 i.e.
Engine
ENG - 117