English / USA

Winter Operation

The chain brake is designed to be activated also by the inertia of the front hand guard

if the forces are sufficiently high. The hand guard is accelerated toward the bar nose - even if your left hand is not behind the hand guard, e.g. during a felling cut. The chain brake will operate only if it has been properly maintained and the hand guard has not been modified in any way.

Check operation of chain brake

Before starting work:

Run engine at idle speed, engage the chain brake (push hand guard toward bar nose). Accelerate up to full throttle for no more than 3 seconds – the chain must not rotate. The hand guard must be free from dirt and move freely.

Chain brake maintenance

The chain brake is subject to normal wear. It is necessary to have it serviced and maintained regularly by trained personnel, such as your STIHL servicing dealer, at the following intervals:

Full-time professional

users:every 3 months

Semi-professional users (in agriculture

and construction): every 6 months

Hobby and

occasional users: every 12 months

1

2

KN

175BA001

 

At temperatures below +10 °C, preheat carburetor as follows:

:Remove the carburetor box cover. Inside the carburetor box cover:

:Move the shutter from summer position (1) to winter position (2).

Heated air is now drawn in from around the cylinder and mixed with cold air – this helps prevent carburetror icing.

: At temperatures above +20 °C: Return shutter to summer position. This is essential to avoid engine running problems and overheating.

Machines with HD filter:

:Install a standard filter in place of the HD-Filter.

:Refit the carburetor box cover and tighten down the twist lock.

MS 440, MS 440 W, MS 440 C

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