Husqvarna 123HD60 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.
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Centrifugal clutch
Centrifugal clutch
Dismantling
Disconnect the throttle cable and sepa-
rate the connections on the short-circuit
cables.
Remove the screws holding the engine to
the vibrational dampers.
Lift out the engine.
502 50 18-01
Remove the cutting deck from the engine.
Dismantle the centrifugal clutch.
Note: left hand threads!
522 43 18-01
Centrifugal clutch
Dismantling
Unhook the throttle cable from the carbu-
rettor and separate the connections to the
short-circuit cable.
Remove the 4 screws holding the engine
to the vibrational dampers.
Lift out the engine and the fi tted cutting
deck.
Remove the three screws (A) and lift out
the cutting deck from the engine.
Position the piston stop, 522 43 18-01, 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).