Husqvarna 531RB Workshop Manual page 36

11. Push the wrist pin from the piston with a piston pin
rod.
12. Remove the piston and remove the needle bearing
and the 2 washers.
36 - Repair instructions
13. Remove the piston rings, if it is necessary.
7.9.2 To clean the cylinder and piston
CAUTION: Clean carefully. The soft aluminum
parts 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.
• Use a screwdriver to remove dirt particles from the
cooling fins.
• Clean all parts.
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