Maintaining And Sharpening The Saw Chain - Stihl MS 240 Instruction Manual

5
6
2
1
4
3
6
N Use a screwdriver to remove the E-
clip (1)
N Remove the washer (2)
N Remove rim sprocket (3)
N Inspect transport profile on the
clutch drum (4) – if there are also
heavy signs of wear, also replace
the clutch drum
N Remove clutch drum or spur chain
sprocket (5) including needle
cage (6) from the crankshaft – with
QuickStop Super chain brake, press
throttle trigger lockout beforehand
MS 240
Install spur chain sprocket / rim
sprocket
N Clean crankshaft stub and needle
cage and lubricate with STIHL
lubricant (special accessory)
N Slide needle cage onto the
crankshaft stub
N 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
2
throttle trigger lockout beforehand
1
N Refit the rim sprocket – cavities
toward the outside
N Refit washer and E-clip on the
crankshaft
Maintaining and
Sharpening the Saw Chain
Sawing effortlessly with a properly
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.
N
Clean the saw chain
N Check the saw chain for cracks and
damaged rivets.
N 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.
Compliance with the angles and
dimensions listed below is
absolutely necessary. An
improperly sharpened saw chain –
especially depth gauges that are
too low – can lead to increased
kickback tendency of the chain
saw – risk of injury!
English
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