18 ENGINE
155
18.4.12 Installing the drive wheel of the balancer shaft
303077-10
18.4.13 Cylinder - Nikasil
®
coating
308787-10
- Ensure that woodruff key
O
is seated properly.
- Warm drive wheel @ of the balancer shaft and push it onto the balancer shaft.
Guideline
1100 °C (212 °F)
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.
18.4.14 Checking/measuring the cylinder
'--
305004-10
- 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
Size II
•
Info
78.000 ... 78.012 mm (3.07086 ...
3.07133 in)
78.012 ... 78.025 mm (3.07133 ...
3.07184 in)
I
The cylinder size
O
is marked on the cylinder collar.
- Using a straightedge and the special tool, check the sealing area of the cylinder
head for distortion.
I
Feeler gauge (590290411 00) (
�
p. 269)
Cylinder/cylinder head - distortion of
sealing area
s; 0.10 mm (::. 0.0039 in)
If the measured value does not meet specifications:
- Change the cylinder.
Содержание FE 250 AU 2014
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Страница 87: ...12 FUEL TANK SEAT TRIM Remove the special tools Join the fuel hose connection 85 ...