db57d230

2.1.12. Replacement of a saddle of the valve

PERFORMANCE ORDER
1. Any plug-in saddle of the valve which is worn out to a limit needs to be replaced at the room temperature with cutting of a wall, as shown in the figure A.
2. After removal of an old saddle of the valve it is necessary to chisel a nest under the increased valve saddle size.
3. Heat a head of cylinders to temperature of 250 °C and press a new saddle of the valve of the repair size. At a press fitting the saddle of the valve has to have room temperature. After installation of a new saddle of the valve it is necessary to execute grinding in of the valve.

Description
Increase in the size, mm
Size tag
Height of a saddle, mm
Diameter of a nest in a head of cylinders, mm
Saddle of the inlet valve
0,3
30
5,1–5,3
28,80–28,821
0,6
60
5,4–5,6
29,10–29,121
Saddle of the final valve
0,3
30
5,9–6,1
34,30–34,325
0,6
60
6,2–6,4
34,60–34,625