Stihl Ms 270 C Owners Manual

20 English / USAMS 270, MS 270 C, MS 280, MS 280 C
Open-face technique
C =
felling notch - determines the 
direction of the fall
For an open-face cut:
: Properly place felling notch 
perpendicular to the line of fall, 
close to the ground.
: Cut down at approx. 50-degree 
angle to a depth of approx.1/5 to 
1/4 of the trunk diameter.
: Make second cut from below at 
approx. 40 degree angle.
: Remove resulting 90-degree piece. Making sapwood cuts
:
For medium sized or larger trees 
make cuts at both sides...

21
MS 270, MS 270 C, MS 280, MS 280 C English / USA
Drive wedges into the felling cut where 
necessary to control the fall.
!
Warning!
If the tip of the bar contacts a wedge, it 
may cause kickback. Wedges should be 
of wood or plastic - never steel, which 
can damage the chain.
E = Hinge
:Helps control the falling tree.
: Do not cut through the hinge – you 
could lose control of the direction of 
the fall. Felling cut for small diameter trees: 
simple fan cut
Engage the bumper spikes of the 
chainsaw...

22 English / USAMS 270, MS 270 C, MS 280, MS 280 C
Felling cut for large diameter trees:!
Warning! 
Felling a tree that has a diameter greater 
than the length of the guide bar requires 
use of either the sectioning felling cut or 
plunge-cut method. These methods are 
extremely dangerous because they 
involve the use of the nose of the guide 
bar and can result in kickback. Only 
properly trained professionals should 
attempt these techniques.
Sectioning method
For the sectioning method make the first...

23
MS 270, MS 270 C, MS 280, MS 280 C English / USA
Enlarge the plunge cut as shown in the 
illustration.
!
Warning!
There is an extreme danger of kickback 
at this point. Extra caution must be taken 
to maintain control of the saw. To make 
the felling cut, follow the sectioning 
method described previously. 
If you are inexperienced with a 
chainsaw, plunge-cutting should not be 
attempted. Seek the help of a 
professional.
!
Warning! 
In order to reduce the risk of personal 
injury, never stand...

24 English / USAMS 270, MS 270 C, MS 280, MS 280 C
Bucking
Bucking is cutting a log into sections.!
Warning!
When bucking, do not stand on the log. 
Make sure the log will not roll downhill. If 
on a slope, stand on the uphill side of the 
log. Watch out for rolling logs.
Cut only one log at a time.
Shattered wood should be cut very 
carefully. Sharp slivers of wood may be 
caught and flung in the direction of the 
operator of the saw. When cutting small logs, place log 
through V - shaped supports on...

25
MS 270, MS 270 C, MS 280, MS 280 C English / USA
MAINTENANCE, REPAIR AND 
STORINGMaintenance, replacement, or repair 
of the emission control devices and 
systems may be performed by any 
nonroad engine repair establishment 
or individual. However, if you make a 
warranty claim for a component 
which has not been serviced or 
maintained properly or if 
nonapproved replacement parts were 
used, STIHL may deny coverage.!
Warning!
Use only identical STIHL replacement 
parts for maintenance and repair....

26 English / USAMS 270, MS 270 C, MS 280, MS 280 C
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,...

27
MS 270, MS 270 C, MS 280, MS 280 C English / USA
: Disengage the chain brake: Pull 
hand guard  (6) toward front handle.
Wear work gloves to protect your 
hands from the sharp cutters.
: Fit the chain – start at the bar nose. :
Fit the guide bar over the studs  (7) –
cutting edges on top of bar must 
point to right – and engage the 
peg of the tensioner slide in locating 
hole  (8) –- place the chain over 
sprocket  (9) at the same time.
: Now turn tensioning screw  (10) 
clockwise until there is...

28 English / USAMS 270, MS 270 C, MS 280, MS 280 C
:
Remove the tensioning gear  (4) 
and turn it over. 
: Unscrew the nut  (5). :
Position the tensioning gear  (4) 
against the guide bar  (6) so that the 
stud  (7) projects through the upper 
hole and the short guide peg  (8) 
locates in the lower hole.
: Screw the nut  (5) on to the stud as 
far as stop. Wear work gloves to protect your 
hands from the sharp cutters.
: Fit the chain – start at the bar nose. 
Pay attention to the position of the...

29
MS 270, MS 270 C, MS 280, MS 280 C English / USA
: Disengage the chain brake: Pull 
hand guard  (9) towards the front 
handle.
: Turn the guide bar so that the 
tensioning gear is facing you.
: Fit the chain over the sprocket  (10). 
The long collar screw  (11) engages 
the hole in the tensioning gear. The 
heads of the two short collar screws 
locate in the guide bar slot. :
Make sure the drive link tangs 
engage the bar groove (see arrow) 
and then rotate tensioning gear 
counterclockwise as far as...