English - 45
5
Push the gudgeon pin from the piston using punch
no. 502 52 42-01. See figure 62.
If the pin is too tight, carefully warm the piston.
7.19 Cleaning and inspection
After dismantling, clean the individual components:
1. Scrape carbon deposits from the top of the
piston.
2. Scrape carbon deposits from the cylinder’s
combustion chamber.
3. Scrape carbon deposits from the cylinder’s
exhaust port.
4. Wash all the components. Remove any
remaining adhesive film from the cylinder and
carburettor distance piece.
5. Inspect the different components for damage
and wear.
Check the piston and cylinder for seizure damage
and wear. Also see the “Analysis and actions”
section.
Check the piston ring for wear and damage. Also
see the “Analysis and actions” section.
Check the gudgeon pin.
• If it has blued, it must be replaced.
• If the piston moves too easily both the piston and
the gudgeon pin must be replaced.
Check the needle bearing. If it is discoloured or
damaged, it must be replaced.
Check the circlips. If they exhibit cracks or are
discoloured (caused by overheating), they must be
replaced.
NOTE!
Scrape carefully with not too sharp a tool
so as not to damage the soft aluminium
parts.
NOTE!
Make sure the spacer washers on each
side of the needle bearing are not
misplaced.
Fig 62
Fig 63
Cylinder and piston
To Next Page
Loading...
Need help?
General
