Chain Lubricant - Stihl MS 391 Safety Manual

English
Checking the lock
– The lug on the clip must engage
entirely in the recess (arrow)
N
Grip the cap – if the cap cannot be
moved or removed, then it is closed
properly
If the cap can be moved or removed
The base of the cap is tilted in relation to
the upper part:
18
Left: Base of cap tilted
Right: Base of cap correctly
positioned
N
Fit cap and twist it counterclockwise
until it engages in the seat of the
filling port
N
Continue to twist the cap
counterclockwise (approx. 1/4 turn)
– this will twist the base of the cap
into the correct position
N
Twist the cap clockwise and close it
– see the section "Closing" and
"Checking the lock"

Chain Lubricant

For automatic and reliable lubrication of
the chain and guide bar – use only an
environmentally compatible quality
chain and bar lubricant. Rapidly
biodegradable STIHL Bioplus is
recommended.
Biological chain oil must be
resistant to aging (e.g. STIHL
Bioplus) since it will otherwise
quickly turn to resin. This results
in hard deposits that are difficult to
remove, especially in the area of
the chain drive, clutch and chain.
It may even cause the oil pump to
seize.
The service life of the chain and guide
bar depends on the quality of the
lubricant. It is therefore essential to use
only a specially formulated chain
lubricant.
Do not use waste oil. Renewed
contact with waste oil can cause
skin cancer. Moreover, waste oil is
environmentally harmful.
Waste oil does not have the
necessary lubricating properties
and is unsuitable for chain
lubrication.
MS 311, MS 391