English / USA

Mounting the Bar and Chain

(Side chain tensioner)

For the proper and effective operation of the chain brake, the brake band and clutch drum must be kept free of dirt, grease and other foreign matter which may reduce friction of the band on the drum.

For these reasons, each STIHL chainsaw should be returned to trained personnel such as your STIHL servicing dealer for periodic inspection and servicing of the brake system according to the following schedule:

Heavy usage - every three months, Moderate usage - twice a year, Occasional usage - annually.

The chainsaw should also be returned immediately for maintenance whenever the brake system cannot be thoroughly cleaned or there is a change in its operating characteristics.

For any maintenance of the emission control system please refer to the maintenance chart and to the limited warranty statement near the end of the instruction manual.

Store chainsaw in a dry place and away from children. Before storing for longer than a few days, always empty the fuel tank (see chapter "Storing the Machine" in the instruction manual).

1

2

 

a

 

KN

t = a : 2

3

001BA105

 

 

You can run chains of different pitches on this chainsaw – depending on the chain sprocket (see “Specifications”):

The chain pitch (1) must match the pitch of the sprocket and the guide bar (for Rollomatic). The drive link gauge (2) must match the bar groove width (3).

The pitch is marked on the chain sprocket and guide bar in inches (e.g. 3/8 or .325). The groove width is marked on the guide bar in millimeters (e.g. 1.6).

If non-matching components of the wrong pitch or drive link gauge are run together on the same machine they may be damaged beyond repair after a short period of operation.

143BA034 KN

:Unscrew the nuts and take off the chain sprocket cover.

 

4

5

KN

 

001BA107

:Turn screw (4) counterclockwise until the tensioner slide (5) butts against left end of housing slot.

28

MS 270, MS 270 C, MS 280, MS 280 C