Husqvarna 122 HD60 Workshop Manual page 28

4
The centrifugal clutch has the task of transferring the power from the engine to the cutting
equipment's drive axle. As the name implies, it works according to a centrifugal principle.
This means the clutch's friction shoes are thrown outwards towards the clutch drum at a certain
engine speed. When the friction against the drum is suffi ciently great it drives the drive shaft at
the same speed as the engine.
Some slipping occurs between the clutch and the clutch drum when accelerating as well as in the
reversed situation when the cutting equipment jams. Thereby preventing abnormal load changes
on the crankshaft.
The engagement speed has been carefully tested so that the engine can idle without the cutting
equipment's drive shaft rotating.
26
Centrifugal clutch
Remove the cutting deck from the engine.
502 71 27-02
Dismantle the centrifugal clutch.
Note: left hand threads!
521 54 83-01
Centrifugal clutch
Dismantling
Unscrew the spark plug.
Unhook the throttle cable from the
carburettor and separate the connections
to the short-circuit cable.
Remove the 2 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.
502 71 27-02
Remove the three screws (B) and lift out
the cutting deck from the engine.
Note that the exhaust pipe does not have
to be removed.
Position the piston stop, 521 54 83-01 in
the spark plug hole so that it is situated
between the piston and the top of the
cylinder.
Use a mandrel and a hammer to loosen
the clutch clockwise (left hand threads).