Instruction Manual
Table Of Contents
- STIHL MS 311, 391
- 1 Guide to Using this Manual
- 2 Safety Precautions
- 3 Reactive Forces
- 4 Working Techniques
- 5 Cutting Attachment
- 6 Mounting the Bar and Chain
- 7 Tensioning the Chain
- 8 Checking Chain Tension
- 9 Fuel
- 10 Fueling
- 11 Chain Lubricant
- 12 Filling Chain Oil Tank
- 13 Checking Chain Lubrication
- 14 Chain Brake
- 15 Winter Operation
- 16 Starting / Stopping the Engine
- 17 Operating Instructions
- 18 Oil Quantity Control
- 19 Taking Care of the Guide Bar
- 20 Cleaning the Air Filter
- 21 Adjusting the Carburetor
- 22 Spark Arresting Screen in Muffler
- 23 Spark Plug
- 24 Storing the Machine
- 25 Checking and Replacing the Chain Sprocket
- 26 Maintaining and Sharpening the Saw Chain
- 27 Maintenance and Care
- 28 Main Parts
- 29 Specifications
- 30 Ordering Spare Parts
- 31 Maintenance and Repairs
- 32 Disposal
- 33 EC Declaration of Conformity
25.1 Fit new chain sprocket
001BA121 KN
–
after use of two saw chains or earlier
–
if the wear marks (arrows) are deeper than
0.5 mm – otherwise the service life of the saw
chain is reduced – use check gauge (special
accessory) to test
Using two saw chains in alternation helps pre‐
serve the chain sprocket.
STIHL recommends use of original STIHL chain
sprockets in order to ensure optimal functioning
of the chain brake.
001BA122 KN
1
2
4
5
6
1
2
3
6
► Use a screwdriver to remove the E-clip (1)
► Remove the washer (2)
► Remove rim sprocket (3)
► Inspect transport profile on the clutch drum (4)
– if there are also heavy signs of wear, also
replace the clutch drum
► Remove clutch drum or spur chain
sprocket (5) including needle cage (6) from the
crankshaft – with QuickStop Super chain
brake, press throttle trigger lockout before‐
hand
25.2 Install spur chain sprocket / rim
sprocket
► Clean crankshaft stub and needle cage and
lubricate with STIHL lubricant (special acces‐
sory)
► Slide needle cage onto the crankshaft stub
► After refitting, turn the clutch drum and/or spur
chain sprocket approx. 1 full turn so that the
carrier for the oil pump drive engages – with
QuickStop Super chain brake, press throttle
trigger lockout beforehand
► Refit the rim sprocket – cavities toward the
outside
► Refit washer and E-clip on the crankshaft
26 Maintaining and Sharpen‐
ing the Saw Chain
26.1 Sawing effortlessly with a prop‐
erly sharpened saw chain
A properly sharpened saw chain cuts through
wood effortlessly even with very little pushing.
Never use a dull or damaged saw chain – this
leads to increased physical strain, increased
vibration load, unsatisfactory cutting results and
increased wear.
► Clean the saw chain
► Check the saw chain for cracks and damaged
rivets
► Replace damaged or worn chain components
and adapt these parts to the remaining parts in
terms of shape and level of wear – rework
accordingly
Carbide-tipped (Duro) saw chains are especially
wear-resistant. For an optimal sharpening result,
STIHL recommends STIHL servicing dealers.
26 Maintaining and Sharpening the Saw Chain English
0458-542-8321-D 31