Tensioning The Saw Chain (Front Chain Tensioner); Tensioning The Saw Chain (Quick Chain Tensioner) - Stihl MS 170 Instruction Manual

9 Tensioning the Saw Chain (front chain tensioner)

8.3 Fitting the saw chain
WARNING
Put on protective gloves – risk of injury by the
sharp cutters
► Fit the chain starting at the nose of the guide
bar
3
► Position the guide bar over the bolts (1) – the
cutting edges of the saw chain must point to
the right
► Position the locating hole (2) over the peg of
the tensioner slide – simultaneously place the
saw chain over the sprocket wheel (3)
► Turn screw (4) to the right until there is very lit‐
tle chain sag on the underside of the bar – and
the drive link tangs engage in the bar groove
► Refit the chain sprocket cover – and then
screw on the nut by hand until it is fingertight
► Go to chapter "Tensioning the saw chain"
0458-206-0121-C
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9 Tensioning the Saw Chain
(front chain tensioner)
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Retensioning during cutting work:
► Switch off the engine.
► Loosen the nuts.
► Hold the bar nose up.
► Use a screwdriver to turn the tensioning
screw (1) clockwise until the chain fits snugly
against the underside of the bar.
► While still holding the bar nose up, tighten
down the nuts firmly.
► Go to "Checking Chain Tension".
A new chain has to be retensioned more often
than one that has been in use for some time.
► Check chain tension frequently – see chapter
on "Operating Instructions".
10 Tensioning the Saw Chain
(quick chain tensioner)
Retensioning during cutting work:
► Shut off the engine.
► Pull out the hinged clip and loosen the wing‐
nut.
► Turn the adjusting wheel (1) clockwise as far
as stop.
► Tighten down the wingnut (2) firmly by hand.
► Fold down the hinged clip.
► Go to "Checking Chain Tension"
A new chain has to be retensioned more often
than one that has been in use for some time.
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