Tensioning The Saw Chain - Stihl MS 390 Instruction Manual

: Disengage the chain brake: Pull
hand guard (6) toward front handle.
Wear work gloves to protect your
hands from the sharp cutters.
: Fit the chain – start at the bar nose.
MS 290, MS 310, MS 390
6
9
: Fit the guide bar over the studs (7) –
cutting edges on top of bar must
point to right – and engage the
peg of the tensioner slide in locating
hole (8) – place the chain over
sprocket (9) at the same time.
: Now turn tensioning screw (10)
clockwise until there is very little
chain sag on the underside of the
bar – and the drive link tangs are
located in the bar groove.
: Refit the sprocket cover –
and screw on the nuts only finger-
tight.
: Go to "Tensioning the Saw Chain".

Tensioning the Saw Chain

7
7
8 10
Retensioning during cutting work:
:
:
:
:
A new chain has to be retensioned more
often than one that has been in use for
some time.
:
English / USA
1
Shut off the engine first –
and then loosen the nuts.
Hold the bar nose up and use
screwdriver to turn tensioning screw
(1) clockwise until chain fits snugly
against the underside of the bar.
While still holding the bar nose up,
tighten down the nuts firmly.
Go to chapter "Checking Chain
Tension".
Check chain tension frequently –
see chapter "Operating
Instructions".
27