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Air Filter System

Cleaning the Air Filter

Chain

Pitch

Minimum

type

 

groove

 

 

depth

Picco

3/8“ P

0.20"

 

 

(5.0 mm)

Rapid

1/4“

0.16"

 

 

(4.0 mm)

Rapid

3/8“; 0.325“

0.24"

 

 

(6.0 mm)

Rapid

0.404“

0.28"

 

 

(7.0 mm)

If groove depth is less than specified:

:Replace the guide bar.

The drive link tangs will otherwise scrape along the bottom of the groove – the cutters and tie straps will not ride on the bar rails.

The air filter system can be adapted to suit different operating conditions by simply installing a choice of filters.

Fabric filter*

For normal operating conditions and winter operation.

Fleece filter (non-woven)*

For dry and very dusty work areas.

1

2

KN

146BA010

 

If there is a noticeable loss of engine power

:Loosen the knob (1) above the rear handle in the direction of the arrow.

:Remove the carburetor box cover (2).

:Clean away loose dirt from around the filter.

:Remove the filter.

:Knock the filter out on the palm of your hand or blow it clear with compressed air from the inside outwards.

In case of stubborn dirt:

:Wash the filter components in STIHL universal cleaner or a clean, non-flammable solution (e.g. warm soapy water) and then dry.

Do not use a brush to clean the fleece filter.

:Always replace damaged filters.

* see “Guide to Using this Manual“

46

MS 280 C