APRILIA SCARABEO 500 - 2008, Service Station Manual

Page: 186 / 324

DO NOT CHANGE THE VALVE FITTING POSITION. FIT THE VALVE SPRINGS WITH THE REF-
ERENCE COLOUR ON THE COTTERS SIDE (TURNS WITH GREATER PITCH).
- Place the valve spring supporting plates on the
head.
- Fit the 4 oil seals alternately with the specific tool.
- Lubricate the oil seals and the valve guides.
Specific tooling
020306Y Punch for fitting valve sealing rings
- Fit the valves, the springs and the plates. Using
the specified tool with the appropriate adaptor,
compress the springs and insert the cotters in their
seats.
Specific tooling
020382Y Tool for removing valve cotters fitted
with part 012
020382Y012 bushing (valve removing tool)
NOTE
DO NOT CHANGE THE VALVE FITTING POSITION. FIT THE VALVE SPRINGS WITH THE REF-
ERENCE COLOUR ON THE COTTERS SIDE (TURNS WITH GREATER PITCH).
Inspecting the cam shaft
- Check the camshaft bearings for signs of abnormal wear or scores.
- Using a micrometer, measure the camshaft bearings.
STANDARD DIAMETER
Specification Desc./Quantity
Bearing A Ø: 42- 0.060 -0.085 mm
Bearing B Ø: 20- 0.020 -0.041 mm
MINIMUM DIAMETER ALLOWED
Specification Desc./Quantity
Bearing A Ø: 41.910 mm
Bearing B Ø: 19.940 mm
Engine
SCARABEO 500
ENG - 186