Husqvarna 572XPG - 17 Piston and Cylinder; Dismantling; Cleaning and Inspection

44 - English
17.1 Dismantling
1. Dismantle the following parts:
• Cylinder cover.
• Spark plug.
• Carburettor. See chapter Carburettor.
• Muer. See chapter Muer.
2. Unscrew the vibration damping unit (C) from the
cylinder. See gure 1.
3. If necessary, unscrew the decompression valve (B).
See gure 1.
4. Unscrew the cylinder’s four bolts (A). See gure 1.
5. Carefully lift up the cylinder. Cover the crankcase
opening immediately with a sheet of paper or a
cloth.
17 Piston and cylinder
Fig. 1
Fig. 2
17.2 Cleaning and inspection
Clean all parts, scrape o all the remains of any gasket
material and scrape o carbon deposits from the
following surfaces:
1. The piston crown.
2. Top of the cylinder bore (inside).
3. The cylinder exhaust port.
4. The decompression valve.
Bx3
6. Remove one of the piston’s circlips (C), press out the
wrist pin (D), and remove the piston. See gure 2.
7. Remove the needle bearing from the connecting
rod (A). See gure 2.
8. Unscrew the intake manifold (four screws). See gure
3.
CAUTION! Exercise care so that dirt and
foreign particles do not get into the
crankcase.
Fig. 3
A
B
C
NOTE! One of the four screws is placed under
the lead of the ignition cable.
A
D
C
Piston and cylinder