Centrifugal Clutch; Dismantling The Centrifugal Clutch - Husqvarna 129C Workshop Manual

Repair Instructions
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 sufficiently 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.

7.5 Dismantling the centrifugal clutch

The following components must be dismantled for
the centrifugal clutch to be accessible.
• The starter cover with half of the cover over the
muffler.
1
Unhook the throttle cable from the carburettor and
remove it from the guides in the carburettor cover.
See figure 13.
2
Carefully pull out the short-circuit cable from the
throttle handle, and separate the connector.
Remove the screw (A) on the side of the throttle
handle, and push the throttle forward onto the
shaft. See figure 14.
3
Loosen the screws and remove the shaft from the
engine. See figure 15.
26
- English

Centrifugal clutch

Fig 13
Fig 14
Fig 15