Husqvarna PF 21 AWD 用户手册

26 – 

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3

Remove the left-hand wing cover.

4

Loosen the locking nuts.

5

Adjust the play between the casing and the adjustment 
screw to 1 mm (0.040") when one pulls the casing. This 
gives a play on the pedal of approximately 40 mm.

6

Tighten the nuts carefully to prevent damaging the 
adjuster screw.

7

The brake should be checked again after adjustment

8

Assemble the left-hand wing cover.

Check that the engine responds to the throttle control and that 
the correct engine speed is achieved at full throttle.

If doubts arise, contact your service representative.

If adjustment is necessary, adjust the lower wire as follows:

1

Loosen the clamping screw for the cable’s outer casing 
and move the throttle to the full throttle position.

2

Check that the throttle wire is attached to the correct hole 
in the lower lever, see diagram.

3

Pull the throttle wire casing to the far left and tighten the 
clamping screw.

If the engine is producing black smoke or is difficult to start 
then the choke wire (upper wire) may be incorrectly adjusted.

If doubts arise, contact your service representative.

If it is necessary to adjust the choke, proceed as follows:

1

Release the clamping screw that secures the wire casing 
and set the choke control to maximum choke.

2

Check that the throttle wire is attached to the upper lever, 
see diagram.

3

Pull the choke wire casing to the far right and tighten the 
clamping screw.

Replace the fuel filter every 100 running hours (once per 
season) or more frequently if it is clogged.

Replace the filter as follows:

1

Open the engine cover.

2

Move the hose clips away from the filter. Use a pair of flat 
pliers.

3

Pull off the filter from the hose ends.

4

Press the new filter into the ends of the hoses. If 
necessary apply liquid detergent to the ends of the filter to 
facilitate connection.

5

Push the hose clips back on the filter and tighten.