Husqvarna 522HS75S Workshop Manual page 37

9. Remove the piston ring, if it is necessary.
7.12.3 To clean and examine the cylinder and
piston
CAUTION: Clean carefully. The soft aluminum
part are easily damaged.
• Remove the carbon deposits from these parts:
a) The top of the piston.
b) The combustion chamber of the cylinder.
c) The exhaust port of the cylinder.
1008 - 003 - 24.11.2020
• Use a screwdriver to remove dirt particles from the
cooling fins.
• Clean all parts.
• Examine all the parts for damage and wear.
Examine the piston and cylinder for damage and
To examine the piston on page 37
wear. Refer to
To examine the cylinder on page 38 .
and
• Examine the piston pin.
a) If it is blue, it must be replaced.
b) The piston pin must be stable or the piston and
the piston pin must be replaced.
c) If the needle bearing has discoloration or
damages, replace it.
• Examine the snap rings. If they have cracks or
discoloration, replace them.
7.12.4 To examine the piston
• Make sure that the piston pin bearing is not
damaged.
• Make sure that the piston pin does not have
damages on the surface against the bearing.
• Make sure that the piston ring can move freely in the
groove.
Repair instructions - 37