Grind valves

AR05.30-I-4202B

Grind valves

11.11.11

1

Clean valve (1)

 Remove any carbon deposits.

2

Clamp valve (1) in valve grinding machine (2)

 The valve (1) must be clamped in valve grinding machine (2) as close as possible behind valve disk in order to avoid disturbing vibrations.

3

Set the grinding angle on valve grinding machine (2)

 The grinding angle must be according to the valve seat angle (A).

*BE05.30-N-1003-01B

4

Slowly move valve (1) with feed toward rotating grinding wheel until it comes into contact with seat surface of valve (1)

5

Continue grinding at a low operating speed until entire valve seat is smooth and free of chatter marks

 Check specified value during machining.

Valve disk diameter (B)

*BE05.30-N-1004-01B

Valve seat width on valve disk (F)

*BE05.30-N-1005-01B

Valve stem diameter (E)

*BE05.30-N-1007-01B

Valve seat faces machining dimension (H), based of the
valve seat surface diameter (G) on intake valve

*BE05.30-N-1008-01B

Valve seat faces machining dimension (H), based of the
valve seat surface diameter (G) on exhaust valve

*BE05.30-N-1009-01B

Concentricity of valve seat to valve stem

*BE05.30-N-1011-01B



*001589532100



*363589022100

Outside micrometer

Vernier caliper

Tool kit

gotis://G_58.3_05.0

6

Remove valve (1) from valve grinding machine (2)

7

Mount valve (1) on valve grinding machine (2) and face-grind the valve stem end

 Check the valve length (C2) while machining.

*BE05.30-N-1006-01B

Vernier caliper

Tool kit

gotis://G_58.3_05.0

8

Check hardness at valve stem end.

*BE05.30-N-1010-01B



*000589202100



Notes on hardness test

AH00.00-N-0012-01A

Number

Designation

Engine
904.9 as of
end no. 039740,

Engine
906.9 as of
end no. 041956
without code MS8

BE05.30-N-1003-01B

Valve seat angle

Inlet

°

20

Outlet

°

36

Outlet

°

45

BE05.30-N-1004-01B

Valve disk dia.

Inlet

mm

33.9 to 34.1

Outlet

mm

37.9 to 38.1

BE05.30-N-1005-01B

Valve seat width on the valve disk

Inlet  20°

mm

3.19

Outlet  20°

mm

-

Outlet  36°

mm

3.63

Outlet  45°

mm

3.35

BE05.30-N-1006-01B

Valve length

Inlet

mm

128.45 to 129.05

Outlet

mm

152.20 to 152.90

BE05.30-N-1007-01B

Valve stem dia.

Inlet

mm

7.935 to 7.950

Outlet

mm

7.925 to 7.940

BE05.30-N-1008-01B

Intake valve seat surface machined dimension (H) relative to valve seat surface dia. (G)

Dimension G

mm

31.0

Dimension H

mm

2.7 to 3.1

BE05.30-N-1009-01B

Exhaust valve seat surface machined dimension (H) relative to valve seat surface dia. (G)

Dimension G

mm

36.0

Dimension H

mm

2.5 to 3.2

BE05.30-N-1010-01B

Hardness at valve stem end

Inlet

HRC

54 to 60

Outlet

HRC

54 to 60

BE05.30-N-1011-01B

Concentricity of valve seat to valve stem

Inlet

mm

0.03

Outlet

mm

0.03