Dismantling - Husqvarna 122C Workshop Manual

6
The cylinder and the piston are two of the components exposed to most strain in the engine. They must
withstand, for example, high speeds, large temperature swings and high pressure. Moreover, they must be
resistant to wear. Despite these tough working conditions, major piston and cylinder failure is relatively
uncommon. The reasons for this include new coatings in the cylinder bore, new types of oil and grease and
refi ned manufacturing techniques.
When servicing these components, cleanliness is of the utmost importance. It is therefore recommended
that the cylinder and the area around it be thoroughly cleaned before being dismantled from the crankcase.
36
Cylinder and piston
Remove the circlips from the gudgeon
pin.

Dismantling

Dismantle the following components to
make the cylinder accessible:
Air fi lter, air fi lter holder and carburettor
(see "Fuel system" chapter).
Starter, clutch cover, muffl er with heat
guard plate, and spark plug.
Dismantle the carburettor's distance
piece/heat guard from the cylinder.
Remove both of the screws holding the
cylinder.
Carefully remove the cylinder straight up
by rocking it backwards. Make sure that
no dirt enters the crankcase.
Use a rag to cover the crankcase ope-
ning under the piston.
502 71 27-02
Using long-nose pliers remove the gud-
geon pin circlips.
Keep your thumb over the circlip to pre-
vent it from fl ying out.