Husqvarna TrioBrake 550XPG - Piston and Cylinder Repair

60 - English
7.22 Dismantling the piston and cylinder
1
Dismantle:
• The cylinder cover
• The carburettor (see “Dismantling the
carburettor”)
• The muer
• The vibration element
• The spark plug cap
• The intake system
2
Unscrew the cylinder’s four screws
and carefully lift away the cylinder and the gasket.
See gure 60.
Cleaning and inspection of the cylinder
Clean all components, scrape o all gasket re-
mains and soot from the following areas:
• The piston crown
• The top of the cylinder bore (inside)
• The cylinder exhaust port
• The base of the cylinder and/or crankcase
Fig 60
Fig 61
3
Cover over the crankcase opening.
4
Remove the circlips for the gudgeon pin and press
out the gudgeon pin. The lift o the piston. See
gure 61.
5
Remove the gudgeon pin bearing (the needle
bearing) using a pliers. See gure 61. Replace with
a new bearing.
NOTE!
Take care to prevent any dirt and foreign
particles from entering the crankcase.
Repair Instructions