Machine valve seat rings

AR05.30-T-4511BB

19.7.01

ENGINE 457.941 in MODELNMB613.368

ENGINE 457.942 in MODEL NMB671.015 /020 /021 /030 /042 /332 /333

ENGINE 457.944 in MODEL NMB613.358 /367 /388

1 Valve seat ring (exhaust)

2 Valve seat ring (intake)

3 Cylinder head

4 Valve seat turning device

5  Cylinder head holding fixture

A05.30-0012-03

	Remove
1	Remove valves	On model 613.358/388 with Engine 457.944 and model 671 with Engine 457.942	AR05.30-T-3511BB
		On model 613.367 with Engine 457.944 and model 613.368 with Engine 457.941	AR05.30-T-3511CB
2	Clamp cylinder head (3) on cylinder head holding fixture (5)		*WH58.30-Z-1001-14A
	Inspect
3	Check valve guides, replace if necessary		AR05.30-T-3731BB
4	Measure valve setback to cylinder head		AR05.30-T-4100-01BB
		Valve set-back to cylinder head joint surface	*BE05.30-N-1003-01J
			*001589532100
			*343589004000
5	Inspect valve seat rings (1, 2)	 Slightly worn valve seats can be reworked. The permissible valve setback to the cylinder head separating surface must also be maintained after machining, if necessary: 
		Replace valve seat rings	AR05.30-T-3831BB
	Machining
6	Machine valve seat rings (1, 2) in cylinder head (3)	Machine valve seat rings with turning tool	AR05.30-T-4532-01BB
		Valve seat angle at valve seat ring "J"	*BE05.30-N-1009-03H
		Intake valve seat faces at valve seat ring machining dimension "H" related to valve seat faces  G	*BE05.30-N-1011-03H
		Exhaust valve seat faces at valve seat ring machining dimension "H" related to valve seat faces  G	*BE05.30-N-1010-03H
			*366589006900
		 If the test values obtained are less than the specified inspection data during machining:
		Replace valve seat rings	AR05.30-T-3831BB
	Inspect
7	Inspect concentricity of valve seat to valve guide		AR05.30-T-4532-02BB
		Valve seat to valve guide - concentricity	*BE05.30-N-1006-02I
			*366589006900
			*WH58.30-Z-1010-05A
		In case of variation of the test values, remachine the intake and exhaust valve seat rings.
	Install
8	Install valves	On model 613.358/388 with Engine 457.944 and model 671 with Engine 457.942	AR05.30-T-3511BB
		On model 613.367 with Engine 457.944 and model 613.368 with Engine 457.941	AR05.30-T-3511CB
		 Use new valves or grind worn valves before installing: 
		Grind valves	AR05.30-T-4202BB
9	Once again measure valve setbacks on both intake and exhaust valves	Measure valve setback to cylinder head	AR05.30-T-4100-01BB
		Valve set-back to cylinder head joint surface	*BE05.30-N-1003-01J
			*001589532100
			*343589004000

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

Test values for valve guides

Number	Designation		Engine 457.9


BE05.30-N-1006-02I	Valve seat to valve guide - concentricity	mm	0.04

Inspection data of valve seat rings

Number	Designation			Engine 457.9


BE05.30-N-1009-03H	Valve seat angle at valve seat ring "J"	Intake	°	45
		Outlet	°	30
BE05.30-N-1010-03H	Exhaust valve seat surface at valve seat ring machining dimension "H" related to valve seat surface dia. "G"	Dimension" G"	mm	38.99...39.01
		Dimension "H"	mm	3.65...3.95
BE05.30-N-1011-03H	Inlet valve seat surface at valve seat ring machining dimension "H" related to valve seat surface dia. "G"	Dimension" G"	mm	41.99...42.01
		Dimension "H"	mm	4.85...4.15

343 589 00 40 00

Valve seat turning kit

Dial gage holder

Dial gage

001 589 53 21 00

366 589 00 69 00

Commercially available tools

Number	Designation
WH58.30-Z-1010-05A	Testing kit for valve seats
WH58.30-Z-1001-14A	Cylinder head holding fixture

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