Remove/install valves

AR05.30-T-3511CB

14.5.03

ENGINE 457.941 in MODELNMB613.368

ENGINE 457.944 in MODELNMB613.367

W05.30-1012-06

1 Collets

2 Valve spring plate

3 Inlet valve spring

4 Exhaust valve spring

5 Cylinder head

6 Inlet valve

7 Outlet valve

8  Valve lifter with extra piece

13.1  Base plate

13.2  Assembly cartridge

13.3  Pressure fork

13.4  Retaining fork

13.5  Bolt

W05.30-0044-06

5 Cylinder head

6 Inlet valve

7 Outlet valve

9 Valve stem seal

10  Dial gage

11  Dial gage holder

A Valve seat angle

B Valve disk dia.

C Valve length

E Valve stem dia.

F Seat width

G  Valve seat face dia.

H Machining dimension

 	Remove/Install
1	Remove nozzle holder combination		AR07.03-T-6831CB
2	Remove cylinder head (5)	On model 613.367	AR01.30-T-5800CB
		On model 613.368	AR01.30-T-5800CA
3	Measure valve setback to cylinder head (5)		AR05.30-T-4100-01BB
		 If the read off value is not within the permissible tolerance, reface valve seat rings or valves, replace if necessary: 	*BE05.30-N-1003-01J
		Machine valve seat rings	AR05.30-T-4511BB
		Grind valves	AR05.30-T-4202BB
			*001589532100
			*343589004000
4.1	Remove valve springs with valve lifter with adapter piece (8)		AR05.30-T-3510-03BBB
			*116589066300
			*442589003100
			*904589003100
			*WH58.30-Z-1001-14A
4.2	Remove valve springs with valve tool case		AR05.30-T-3510-03BB
			*541589006100
5	Detach valve stem seal (9)	 Installation: Replace valve stem seals (9).	AR05.30-T-3510CB
6	Rotate cylinder head (5) and pull out intake (6) and exhaust valves (7)	 Mark installation position of the valves to the cylinder head. Installation: Oil valve stems with engine oil. Pay attention to marking of valves.
	Inspect
7	Check valve guides, replace if necessary		AR05.30-T-3731BB
8	Inspect valves for wear, concentricity and dimensional tolerance	 Checking and machining dimensions for valves	AR05.30-T-4202-01BB
		Valve seat angle (A)	*BE05.30-N-1004-01J
		Valve disk  (B)	*BE05.30-N-1005-01J
		Seat width (F) at valve plate	*BE05.30-N-1006-01J
		Valve length (C)	*BE05.30-N-1007-01J
		Valve stem  (E)	*BE05.30-N-1008-01J
		Machining dimension (H) of intake valve seat face in relation to valve seat faces  (G)	*BE05.30-N-1009-01J
		Machining dimension (H) of exhaust valve seat face in relation to valve seat faces  (G)	*BE05.30-N-1010-01J
		Concentricity of valve seat to valve stem	*BE05.30-N-1011-01J
			*WH58.30-Z-1002-12A
		 If specified dimensions are not maintained: Grind valves, replace if necessary: 
		Grind valves	AR05.30-T-4202BB
9	Inspect valve seat rings	 A rework without replacement of the valve seat ring can be performed if the valve seat ring is loosely stamped in. If wear is severe: 
		Replace valve seat rings	AR05.30-T-3831BB
10	Test valve springs	 If problem exists, replace valve springs.	AR05.30-T-3010CB
11	Install in the reverse order	Perform steps 6 to 1.

Inspection data of valves

Number	Designation				Engine 457.9


BE05.30-N-1003-01J	Valve set-back to cylinder head joint surface		when new	mm	0.7...1.1
			permissible value	mm	1,6
BE05.30-N-1004-01J	Valve seat angle "A"		Intake	°	30
			Outlet	°	45
BE05.30-N-1005-01J	Valve disk Ø "B"		Intake	mm	45.4...45.6
			Outlet	mm	40.9...41.3
BE05.30-N-1006-01J	Seat width at valve plate "F"		Intake	mm	3,5...4,5
			Outlet	mm	3,5...4,5
BE05.30-N-1007-01J	Valve length "C"		Intake	mm	145,0
			Outlet	mm	145,0
BE05.30-N-1008-01J	Valve stem Ø "E"		Intake	mm	8.935...8.950
			Outlet	mm	8.925...8.940
BE05.30-N-1009-01J	Inlet valve seat surface machining dimension "H" related to valve seat surface Ø "G"		Dimension" G"	mm	42,0
		when new	Dimension "H"	mm	3.1...3.3
		Machining limit	Dimension "H"	mm	2,9
BE05.30-N-1010-01J	Éxhaust valve seat surface machining dimension "H" related to valve seat surface Ø "G"		Dimension" G"	mm	39,0
		when new	Dimension "H"	mm	2.8...3.1
		Machining limit	Dimension "H"	mm	2,3
BE05.30-N-1011-01J	Concentricity of valve seat to valve stem		Intake	mm	0,03
			Outlet	mm	0,03