Dismantling; Cutting Deck - Husqvarna 122 HD60 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
34
Cylinder and piston
Remove the cutting deck from the engine.
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Dismantle the following parts:
Spark plug, air fi lter, carburettor, muffl er, heat protective plate, fan house cover, ignition
module, fl ywheel, cylinder cover, distance piece that is fi tted to the cylinder, fuel tank (do
not lose the rubber bushings fi tted between the tank and the crankcase).
Only the cylinder and the crankcase now remain.
Remove both screws holding the cylinder to the crankcase.
Lift the cylinder straight up. Do not turn it as the piston ring can easily break.
Use a rag to cover the crankcase opening under the piston.
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Dismantling

Unscrew the spark plug.
Unhook the throttle cable from the
carburettor and separate the connections
to the short-circuit cable.
Remove the two screws holding the front
handle.
Lift out the engine and the fi tted cutting
deck.
Remove the guard over the muffl er (2
screws). Remove the screws (A) and lift
off the rear handle.
Remove the two screws (B) and lift off the
cutting deck from the engine.
Note that the exhaust pipe does not have
to be removed.