Filling Chain Oil Tank; Checking Chain Lubrication - Stihl MS 251 C-Q Instruction Manual

Filling Chain Oil Tank

Preparations
Thoroughly clean the oil filler cap
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and the area around it to ensure that
no dirt falls into the tank.
Position the machine so that the
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filler cap is facing up.
Open the filler cap.
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Fill up with chain oil.
Refill the chain oil tank every time
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you refuel.
Take care not to spill chain oil while
refilling and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for chain oil (special
accessory).
Close the filler cap.
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There must still be a small amount of oil
in the oil tank when the fuel tank is
empty.
MS 251 C-Q
If the oil level in the tank does not go
down, the reason may be a fault in the oil
supply system: Check chain lubrication,
clean the oilways, contact your dealer
for assistance if necessary STIHL
recommends that you have servicing
and repair work carried out exclusively
by an authorized STIHL servicing
dealer.

Checking Chain Lubrication

The saw chain must always throw off a
small amount of oil.
NOTICE
Never operate your saw without chain
lubrication. If the chain runs dry, the
whole cutting attachment will be
irretrievably damaged within a very short
time. Always check chain lubrication and
the oil level in the tank before starting
work.
Every new chain has to be broken in for
about 2 to 3 minutes.
After breaking in the chain, check chain
tension and adjust if necessary – see
"Checking Chain Tension".
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