WÄRTSILÄ PAAE051728, Инструкция по эксплуатации

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12.3 Exhaust and inlet valves and seat rings
12.3.1 General description
Data and dimensions
Material: High quality steel
Diameter
-inlet valve:
112 mm
-exhaust valve: 107 mm
Valve seat ring
Material: High quality steel
Angle
- inlet seat:
20°
- exhaust seat 40°
The cylinder head has four valves fitted, two inlet valves and two
exhaust valves. The inlet valves are bigger than the exhaust
valves.
The valves move in cast iron guides, which are press fitted in
the cylinder head and can be replaced. The valve guides have an
O-ring (sealing against the valve stem), which is located at the
top of the guide bore.
The valves are provided with one valve spring per valve and
valve rotating devices or valve spring retainers.
Valve seat rings are fitted in the cylinder head for both inlet and
exhaust valves. The exhaust valve seat rings are cooled and hence
provided with two O-rings.
12.3.2 Dismantling valves
1 Fit the tool
800027 according to Fig 12-5.
2 Compress the springs
about 15-20 mm by the screw.
3 Knock at the centre of the valve discs
with a soft piece
of wood, plastic hammer or similar, whereby the valve cotters
come loose and can be removed.
4 Unload the tool.
5 Spring retainers and springs can now be removed.
Tool assembly for dismantling valves
A
Fig 12-5
2012529312
32-200646-01 Cylinder Head with Valves 12
WÄRTSILÄ 32 12 - 7