4
38
502 50 64-01 502 50 18-01
Model 326
Mod. 326 Mod. 327
Centrifugal clutch
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 su 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.
Dismantling
Dismantle the clutch by following the
instructions in the chapter ”Electrical
system”.
Dismantling
The centrifugal clutch is bolted to the
ywheel.
Follow the detailed instructions in the
chapter ”Electrical system” when the
clutch is to be dismantled.
Twist apart the clutch and inspect the
di erent parts with regard to wear or
damage.
Twist apart the clutch.
Inspect the di erent parts with regard to
wear or damage.
Pay special attention to the ends of the
springs, which in addition to wear, can
also show signs of cracking.
Assembly
Connect the clutch shoes together with
the spring.
NOTE!
Both clutch shoes should be
replaced even if only one of them is
showing signs of heavy wear. This is
to avoid engine vibration caused by
imbalance in the clutch.
Bolt the clutch on the ywheel. Do not
forget the washers (A).
Note the slots on the washer lie closest to
the ywheel. Align with the equivalent pins
on the ywheel.
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