17 ENGINE
152
17.4.12 Checking crankshaft run-out at bearing pin
17.4.13 Cylinder - Nikasil
®
coating
306589-10
-
Position the crankshaft on a roller block.
-
Turn the crankshaft slowly.
Check the crankshaft run-out on both bearing pins.
I
Crankshaft - run-out on bearing pin
I
:5 0.04 mm (:5 0.0016 in)
If the crankshaft run-out at the bearing pin is larger than the specification:
- Align the crankshaft.
Nikasil
®
is a surface protection layer for a coating procedure developed by Mahle.
The name is derived from the two materials used in this procedure - a layer of nickel
into which is embedded the particularly hard silicone carbide.
The most important advantages of the
Nikasil
®
coating are very good heat conduc
tivity, resulting in much improved performance, low wear, and a lightweight cylinder.
17.4.14 Checking/measuring the cylinder
'--
306590-10
304696-10
-
Check the cylinder bearing surface for damage.
If the cylinder bearing surface is damaged:
-
Change the cylinder and piston.
-
Measure the cylinder diameter at several locations on the
0-
and
0-axes
using
a micrometer to identify oval wear.
Guideline
Cylinder - drill hole diameter
Size I
95.000 ... 95.012 mm (3.74015 ...
3.74062 in)
Size II
95.013 ... 95.025 mm (3.74066 ...
3.74113 in)
-
The cylinder size
O
is labeled on the side of the cylinder.
-
Using a straightedge and the special tool, check the sealing area of the cylinder
head for distortion.
I
Feeler gauge (590290411 00) (
ll!;!
p. 229)
Cylinder/cylinder head - sealing area
distortion
:5 0.10 mm (:5 0.0039 in)
If the measured value does not meet specifications:
-
Change the cylinder.
Summary of Contents for FS 450 2015
Page 1: ...PIONEERING SINCE 1903 REPAIR MANUAL2015 FS 450 Art no 3403022en Husqvarna MOTORCYCLES ...
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