Taking Care Of The Guide Bar - Stihl MS 150 C Instruction Manual

English
Chain cold
Tension is correct when the chain fits
snugly against the underside of the bar
but can still be pulled along the bar by
hand. Retension if necessary – see
"Tensioning the Saw Chain".
Chain at operating temperature
The chain stretches and begins to sag.
The drive links must not come out of the
bar groove on the underside of the bar –
the chain may otherwise jump off the
bar. Retension the chain – see
"Tensioning the Saw Chain".
NOTICE
The chain contracts as it cools down. If it
is not slackened off, it can damage the
crankshaft and bearings.
After a long period of full-throttle
operation
After a long period of full-throttle
operation, allow engine to run for a while
at idle speed so that the heat in the
engine can be dissipated by flow of
cooling air. This protects engine-
mounted components (ignition,
carburetor) from thermal overload.
After finishing work
Slacken off the chain if you have
N
retensioned it at operating
temperature during work.
30
NOTICE
Always slacken off the chain again after
finishing work. The chain contracts as it
cools down. If it is not slackened off, it
can damage the crankshaft and
bearings.
Short-term storage
Wait for engine to cool down. Keep the
machine with a full tank of fuel in a dry
place, well away from sources of
ignition, until you need it again.
Long-term storage
See "Storing the machine"

Taking Care of the Guide Bar

2
1
Flip the bar – after each sharpening
N
and each time the chain is changed
– to avoid uneven wear, especially
at the sprocket nose and on the
bottom
Periodically clean the oil inlet
N
hole (1), oil outlet channel (2) and
bar groove (3)
Measure groove depth – using the
N
measuring tool on the file gauge
(special accessory) – in the area
with the greatest wear
Chain type Chain pitch Minimum
groove depth
Picco 1/4" P 4.0 mm
Rapid 1/4" 4.0 mm
3
MS 150 C