Husqvarna 131RB Workshop Manual page 52

8.13.2 To disassemble the cylinder and piston
1. Remove parts as given in
cylinder and piston on page 51 to get access to the
cylinder and piston.
2. Loosen the 4 bolts. Pull the cylinder up. Make sure
no dirt goes into the crankcase. Put a cloth on top of
the crankcase opening.
3. Use a pointed tool to remove the wrist pin snap
rings. Hold down the snap ring with your thumb to
make sure the snap ring does not eject.
52 - Repair instructions
To get access to the
4. Push the wrist pin from the piston with a punch of
the correct dimension. If the wrist pin is too tight,
increase the temperature of the piston with a hot air
gun.
8.13.3 To clean and examine the cylinder and
piston
1. Remove carbon particles from the top of the piston,
from the combustion chamber of the cylinder and
from the exhaust port of the cylinder.
CAUTION: Clean carefully to not cause
damage to the soft metal parts.
2. Clean all the components with water.
3. Examine the components for damage and wear.
a) Examine the piston and cylinder for damage and
Faults and causes on page 53 .
wear. Refer to
b) Examine the piston rings for wear and damage.
Faults and causes on page 53 .
Refer to
c) Examine the wrist pin. Replace the wrist pin if it
is blue. Replace the piston and the wrist pin if
the piston moves too easily.
d) Examine the needle bearing. Replace the needle
bearing if it has discoloration or damages.
e) Examine the snap rings. Replace the snap rings
if they have cracks or discoloration.
f) Examine the distance piece for cracks and other
damage.
627 - 002 - 23.04.2018