Stihl MS 191 T, Instruction Manual

Page: 34 / 106

33 MS 191 T
English / USA
: Turn the bar over –
every time you sharpen the chain
and every time you replace the
chain – this helps avoid one-sided
wear, especially at the nose and
underside of the bar.
: Regularly clean
the oil inlet hole
(1) ,
the oilway (2) and
the bar groove (3) .
:
Measure groove depth –
with scale on filing gauge* – in area
used most for cutting.
* see “Guide to Using this Manual”
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.
Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
When there is a noticeable loss of
engine power:
:
Press down the throttle trigger
interlock and set the choke lever
to
l .
: Loosen screw (1) on filter cover (2) .
:
Swing the filter cover up and take it
off.
: Clean away loose dirt from around
the filter.
Taking Care of Guide Bar
2
001BA119 KN
1
3
3
Chain
type Pitch Minimum
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)
Cleaning the Air Filter
1
2
170BA019 KN