Checking And Replacing The Chain Sprocket; Maintaining And Sharpening The Saw Chain - Stihl HT 105 Instruction Manual

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Checking and Replacing the
Chain Sprocket
Remove chain sprocket cover, saw
N
chain and guide bar
Replace the chain sprocket
a
replace after using two saw chains
–
or sooner
if the wear marks (a) on the sprocket
–
are deeper than approx. 0.5 mm
(0.02 in) since this would reduce the
service life of the saw chain. You
can use a gauge (special
accessory) to check the depth of the
wear marks
Using two saw chains in alternation
helps preserve the chain sprocket.
STIHL recommends the use of original
STIHL chain sprockets.
26
The chain sprocket is driven via a friction
clutch. Have the chain sprocket replaced
by an authorized dealer.
STIHL recommends that maintenance
and repair work be carried out only by
authorized STIHL dealers.
Maintaining and Sharpening
the Saw Chain
Cutting effortlessly with a correctly
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.
N
Check the chain for cracks in the
N
links and damaged rivets.
Replace any damaged or worn
N
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 particular if the depth
gauge is set too low – there is an
increased risk of kickback, with resulting
risk of injury.
The saw chain cannot be locked in place
on the guide bar. Therefore, it is best to
remove the chain from the bar and
resharpen it on a workshop sharpening
tool (FG 2, HOS, USG).
HT 105, HT 134, HT 135