Husqvarna FS 450 2017 Repair Manual page 131

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Check the chain sliding guard for wear.
If the lower edge of the chain pins is in line with, or below,
the chain sliding guard:
-
Change the chain sliding guard.
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Check that the chain sliding guard is firmly seated.
If the chain sliding guard is loose:
-
Tighten the screws on the chain sliding guard.
Guideline
Screw, chain
sliding guard
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Check the chain sliding piece for wear.
If the lower edge of the chain pins is in line with or below
the chain sliding piece:
-
Change the chain sliding piece.
-
Check that the chain sliding piece is firmly seated.
If the chain sliding piece is loose:
-
Tighten the screw on the chain sliding piece.
Guideline
Screw, chain slid-
ing piece
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Check the chain guide with a slide gauge for dimension Ci) .
Minimum thickness Ci) of
the chain guide
If the measured value is less than the specification:
-
Change the chain guide.
M6 6 Nm (4.4 lbf ft)
Loctite
MS 15 Nm
(11.1 lbf ft)
6 mm (0.24 in)
WHEELS 14
®
243
™
129