Shroud; Air Filter System - Stihl MS 251 Notice D'emploi

English
Chain type Chain pitch Minimum
groove depth
Picco 1/4" P 4.0 mm
Rapid 1/4" 4.0 mm
Picco 3/8" P 5.0 mm
Rapid 3/8"; 0.325" 6.0 mm
Rapid 0.404" 7.0 mm
If the groove is not at least this deep:
Replace guide bar
N
Otherwise the drive links will grind
against the base of the groove – the
bottoms of the cutters and the tie straps
will not lie against the bar.
32

Shroud

Remove shroud
Move the Master Control Lever to
N
the stop position 0
Push the front hand guard forwards
N
– the saw chain is blocked
2
1
Loosen screws (1)
N
Remove the shroud (2)
N
Refitting the shroud
Refit the shroud and tighten the
N
screws

Air Filter System

The air filter system can be adapted to
suit different operating conditions by
installing different filters. Changing the
filter is quick and simple.
Fleece filter
1
1
Fleece filter for normal operating
N
conditions and dry work areas.
HD2 filter
HD2 filter (black filter frame, pleated
N
filter material) for extreme wintry
conditions (e.g. powder or drifting
snow) or very dusty work areas.
MS 251, MS 251 C