Maintaining And Sharpening The Saw Chain - Stihl MS 251 Manual De Instrucciones

English
5
6
2
1
4
3
6
Use a screwdriver to remove the E-
N
clip (1)
Remove the washer (2)
N
Remove rim sprocket (3) (if so
N
equipped), clutch drum (4) and
needle cage (6).
Inspect transport profile for rim
N
sprocket on the clutch drum (4) – if
there are also heavy signs of wear,
also replace the clutch drum
Remove clutch drum with integrated
N
spur chain sprocket (5) (if so
equipped) including needle cage (6)
from the crankshaft – for
powerheads with Quickstop Plus
chain brake system, depress
throttle trigger lockout beforehand
50
Install spur chain sprocket / rim sprocket
Clean crankshaft stub and needle
N
cage and lubricate with STIHL
lubricant (special accessory)
Slide needle cage onto the
N
crankshaft stub
After refitting, turn the clutch drum
N
and/or spur chain sprocket approx.
1 full turn so that the carrier for the
oil pump drive engages
Refit the rim sprocket – cavities
N
toward the outside
2
1
Refit washer and E-clip on the
N
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.
Clean the saw chain
N
Check the saw chain for cracks and
N
damaged rivets
Replace damaged or worn chain
N
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.
WARNING
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!
MS 251, MS 251 C