Instruction Manual

9931BA009 KN
1
2
3
► Ease the E-clip (1) off the shaft.
► Remove and inspect the washer (2) – replace
it if it shows signs of wear.
► Remove the chain sprocket (3).
► Install the new chain sprocket in the reverse
sequence.
26 Maintaining and Sharpen‐
ing the Saw Chain
26.1 Cutting effortlessly with a cor‐
rectly sharpened chain
A properly sharpened chain slices through wood
effortlessly and requires very little feed pressure.
Do not work with a dull or damaged chain as it
will increase the physical effort required, produce
unsatisfactory results and a higher rate of wear.
► Clean the chain.
► Check the chain for cracks in the links and
damaged rivets.
► Replace any damaged or worn parts of the
chain and match the new parts to the shape
and size of the original parts.
Carbide-tipped saw chains (Duro) are particularly
wear resistant. STIHL recommends you have
your chain resharpened by a STIHL servicing
dealer.
WARNING
It is absolutely essential to comply with the
angles and dimensions specified below. If the
saw chain is incorrectly sharpened – and in par‐
ticular if the depth gauge is set too low – there is
a risk of increased kickback of the saw, with
resulting risk of injury.
26.2 Chain pitch
689BA027 KN
a
The chain pitch (a) is marked on the depth gauge
end of each cutter.
Mark (a) Chain pitch
inch mm
7 1/4 P 6.35
1 or 1/4 1/4 6.35
6, P or PM 3/8 P 9.32
2 or 325 0.325 8.25
3 or 3/8 3/8 9.32
4 or 404 0.404 10.26
Select file diameter according to chain pitch –
see table “Sharpening Tools”.
You must observe certain angles when resharp‐
ening the chain cutter.
26.3 Filing and side plate angles
A
B
689BA021 KN
A Filing angle
STIHL saw chains are sharpened to a filing angle
of 30°. Exceptions are ripping chains with a filing
26 Maintaining and Sharpening the Saw Chain English
0458-756-0121-B 27