Storing The Machine; Checking And Replacing Chain Sprocket - Stihl MS 191 T Instruction Manual

English / USA

Storing the Machine

For periods of about 3 months or longer:
: Drain and clean the fuel tank in a
well ventilated area.
:
Run engine until carburetor is dry,
this helps prevent the carburetor
diaphragms sticking together.
:
Remove the saw chain and guide
bar, clean them and spray with
corrosion inhibiting oil.
:
Thoroughly clean the unit,
pay special attention to the cylinder
fins and air filter.
: If you use a biological chain and bar
lubricant, e.g. STIHL BioPlus,
completely fill the chain oil tank.
:
Store the unit in a dry and high or
locked location, out of the reach of
children and other unauthorized
persons.
38
Checking and Replacing
Chain Sprocket
Replace the chain sprocket after using
two Oilomatic chains.
Replace sooner if the wear marks
on the sprocket are deeper than
approx. 0.02 in (0.5 mm) since this
would reduce the life of the chain.
You can use a special reference gauge*
to check the depth of the wear marks on
sprockets.
It is best to use two chains in rotation
with one sprocket.
Before removing the chain sprocket
Remove the chain sprocket cover, chain
and guide bar.
Disengage the chain brake:
Pull the hand guard back towards the
front handle.
* See "Guide to Using this Manual"
:
Use a screwdriver to remove
the E-clip.
:
Pull the washer, spur sprocket and
needle cage off the crankshaft.
Clean the crankshaft stub and
needle cage and lubricate with
STIHL grease*.
: Reassemble with a new spur
sprocket.
After fitting the clutch drum, rotate it
about one half turn to engage the oil
pump drive.
:
Refit washer and E-clip on the
crankshaft.
Use only original STIHL chain sprockets
to ensure correct operation of the chain
brake.
* See "Guide to Using this Manual"
MS 191 T