Taking Care Of The Guide Bar; Shroud - Stihl MS 251 C-Q Instruction Manual

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
MS 251 C-Q
Picco
Rapid
Rapid
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.
3
3/8" P 5.0 mm
3/8"; 0.325" 6.0 mm
0.404" 7.0 mm

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
English
1
1
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