Taking Care Of The Guide Bar; Shroud; Air Filter System - Stihl MS 231 Instruction Manual

20 Taking Care of the Guide Bar

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.
19.3.1 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.
19.3.2 Long-term storage
See "Storing the machine"
20 Taking Care of the Guide
Bar
2
► Turn the guide bar over – every time you
sharpen the chain and every time you replace
the chain – this helps avoid one-sided wear,
especially at the nose and underside of the
bar.
► Regularly clean the oil inlet hole (1), the oil‐
way (2) and the bar groove (3)
► Measure the groove depth – with the scale on
the filing gauge (special accessory) – in the
area used most for cutting
Chain type Chain pitch
Picco 1/4" P
Rapid 1/4"
Picco 3/8" P
Rapid 3/8"; 0.325"
Rapid 0.404"
If groove depth is less than specified:
► Replace the guide bar
The drive link tangs will otherwise scrape along
the bottom of the groove – the cutters and tie
straps will not ride on the bar rails.
0458-737-8321-C
21.1
► Move the Master Control Lever to the stop
► Push the front hand guard forwards – the saw
► Loosen screws (1)
► Remove the shroud (2)
21.2
► Refit the shroud and tighten the screws
1
3
The air filter system can be adapted to suit differ‐
ent operating conditions by installing different fil‐
ters. Changing the filter is quick and simple.
22.1
Minimum
groove
depth
► Fleece filter for normal operating conditions
4.0 mm
4.0 mm
5.0 mm
6.0 mm
7.0 mm

21 Shroud

Remove shroud
position 0
chain is blocked
1
Refitting the shroud

22 Air Filter System

Fleece filter
and dry work areas.
English
1
2
1
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