17.4.16 Cylinder - Nikasil
®
- coating
D04965-10
ENGINE 17
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 conductivity, resulting in better performance, low
wear, and a lightweight cylinder.
17.4.17 Checking/measuring the cylinder
D04966-10
D04967-10
D04968-10
-
Check the cylinder bearing surface for damage.
If the cylinder bearing surface is damaged:
-
Change the cylinder and piston.
-
Measure the bore diameter at several locations on
the
0-axis
and
0-axis
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 marked on the side of the cylinder.
-
Using a straightedge and the special tool, check the sealing
surface of the cylinder head for distortion.
I
Feeler gauge (590290411 00) (
8
p. 311)
Cylinder/cylinder head -
sealing area distortion
s 0.10 mm (s 0.0039 in)
If the measured value does not meet specifications:
-
Change the cylinder.
...
199
Содержание FC 450 2018
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Страница 159: ...BRAKE SYSTEM 16 Check the foot brake lever for a firm pressure point 157 ...
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