Checking Crankshaft Run-Out At Bearing Pin; Cylinder - Nikasil ® Coating; Checking/Measuring The Cylinder - Husqvarna FC 450 2014 Repair Manual

17 ENGINE
17.4.12

Checking crankshaft run-out at bearing pin

17.4.13 Cylinder - Nikasil
17.4.14

Checking/measuring the cylinder

'--
-
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
If the crankshaft run-out at the bearing pin is larger than the specification:
-
Align the crankshaft.
® coating
®
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
tivity, resulting in much improved performance, low wear, and a lightweight cylinder.
306589-10
-
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
a micrometer to identify oval wear.
Guideline
Cylinder - drill hole diameter
Size I
Size II
-
The cylinder size
306590-10
-
Using a straightedge and the special tool, check the sealing area of the cylinder
head for distortion.
I
Feeler gauge (590290411 00) (
Cylinder/cylinder head - sealing area
distortion
If the measured value does not meet specifications:
-
Change the cylinder.
304696-10
I
:5 0.04 mm (:5 0.0016 in)
®
Nikasil coating are very good heat conduc­
95.000 ... 95.012 mm (3.74015 ...
3.74062 in)
95.013 ... 95.025 mm (3.74066 ...
3.74113 in)
O
is labeled on the side of the cylinder.
.- p. 222)
:5 0.10 mm (:5 0.0039 in)
150
0-
and 0-axes using