Grind valves

AR05.30-W-4202A

Grind valves

5.6.09

ENGINES 904.904 in MODEL 670

ENGINES 904.908 /914 /923 /936 in MODELS 668, 670

ENGINES 904.9 in MODEL 374, 375, 673, 674, 676, 958, 970, 972, 975, 976

ENGINES 906.9 in MODEL 374, 958, 970, 972, 974, 975, 976

ENGINES 906.9 in MODEL 374, 375, 950, 952, 953, 954, 958

ENGINES 906.9 in MODEL 957 except CODE (MS8) Natural gas engine

W05.30-0061-06

1 Valve

2 Valve grinding machine

A Valve seat angle

B Valve disk dia.

C1 Valve length (engine 904.9 up to engine end no. 039739 and engine 906.9 up to engine end no. 041955)

C2 Valve length (engine 904.9 as of engine end no. 039740 and engine 906.9 as of engine end no. 041956)

E Valve stem dia.

F Valve seat width on the valve disk

G Valve seat face dia.

H Valve seat face machining dimension

Modification notes

11.3.09

Exhaust valve spring, exhaust valve and exhaust valve seat ring modified, added.

Step 1

	Grinding
1	Remove valve (1)		AR05.30-W-3511A
	Exhaust valve spring, exhaust valve and exhaust valve seat ring modified		BT05.30-N-0004-01RH
2	Clean valve (1)	 Remove carbon deposits from valve (1).
3	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.
4	Adjust valve seat angle (A) on valve grinder (2)		*BE05.30-N-1003-01B
5	Slowly move valve (1) with feed toward rotating grinding wheel until it comes into contact with seat surface of valve (1)		*BE05.30-N-1003-01B
6	Continue grinding with a low feed rate until entire circumference of valve seat is smooth and free of chatter marks	 After this operation, the measurements must not be less than specified check values.
		Valve plate Ø (B)	*BE05.30-N-1004-01B
		Valve stem dia. (E)	*BE05.30-N-1007-01B
		Valve seat width on valve disk (F)	*BE05.30-N-1005-01B
		Intake valve seat surface machined dimension (H) relative to valve seat surface dia. (G)	*BE05.30-N-1008-01B
		Exhaust valve seat surface machined dimension (H) relative to valve seat surface Ø (G)	*BE05.30-N-1009-01B
		Concentricity of valve seat to valve stem	*BE05.30-N-1011-01B
			*001589532100
			*363589022100
7	Unclamp the valve (1) at the valve grinding machine
8	Place valve (1) onto valve grinding machine (2) and face-grind the valve stem end	 After this operation, valve length (C) must not be less than the specification.	*BE05.30-N-1006-01B
9	Install valve (1)		AR05.30-W-3511A

Test values for valves

Number	Designation			Engine 904.9 up to end no. 039739, Engine 906.9 up to end no. 041955 without code MS8	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	20
		Outlet	°	36	36
		Outlet	°	45	45
BE05.30-N-1004-01B	Valve disk dia.	Inlet	mm	33.9...34.1	33.9...34.1
		Outlet	mm	37.9...38.1	37.9...38.1
BE05.30-N-1005-01B	Valve seat width on the valve disk	Inlet  20°	mm	3,19	3,19
		Outlet  20°	mm	-	-
		Outlet  36°	mm	3,63	3,63
		Outlet  45°	mm	3,35	3,35
BE05.30-N-1006-01B	Valve length	Inlet	mm	125.70...126.10	128.45...129.05
		Outlet	mm	152.20...152.90	152.20...152.90
BE05.30-N-1007-01B	Valve stem dia.	Inlet	mm	7.935...7.950	7.935...7.950
		Outlet	mm	7.925...7.940	7.925...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	31.0
		Dimension H	mm	2.7...3.1	2.7...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	36,0
		Dimension H	mm	2.5...3.2	2.5...3.2
BE05.30-N-1011-01B	Concentricity of valve seat to valve stem	Inlet	mm	0.03	0.03
		Outlet	mm	0.03	0.03

001 589 53 21 00

363 589 02 21 00

Dial indicator holder

Dial indicator