3512E Engines for Well Stimulation Pumps Caterpillar

Cylinder Head, Valves, Valve Springs and Valve Seat Inserts

Usage:

3512E HF8

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Illustration 1	g06313948
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Table 1
Item	Qty	Part	Specification Description
1	2	498-1592 Inlet Valve	Before assembly, coat the inlet valve stems with clean engine oil.
			Stem diameter is 11.000 ± 0.010 mm (0.4331 ± 0.0004 inch).
			Valve diameter is 56.00 ± 0.15 mm (2.205 ± 0.006 inch).
			Face angle is 19.40 ± 0.25 degrees.
2	2	498-1593 Exhaust Valve	Before assembly, coat the exhaust valve stems with clean engine oil.
			Stem diameter is 12.451 ± 0.025 mm (0.4902 ± 0.0010inch).
			Valve diameter is 56.00 ± 0.15 mm (2.205 ± 0.006 inch).
			Face angle is 45.60 ± 0.25 degrees.
3	4	450-0908 Spring	Length under test force is 60.29 mm (2.373 inch).
			Test force is 510 ± 26 N·m (376 ± 19 lb ft).
			Free length after test is 76.15 mm (2.998 inch).
4	4	450-0909 Spring	Length under test force is 57.5 mm (2.26 inch).
			Test force is 275.0 ± 13.8 N·m (202.8 ± 10.2 lb ft).
			Free length after test is 72.1 mm (2.83 inch).
5	2	449-7118 Valve Guide	Before assembly, apply clean engine oil to the bore.
5	2	449-7118 Valve Guide	Bore in the cylinder head for exhaust valve guide is 12.619 ± 0.025 mm (0.4968 ± 0.0010 inch).
6	2	449-7117 Valve Guide	Before assembly, apply clean engine oil to the bore.
6	2	449-7117 Valve Guide	Bore in the cylinder head for intake valve guides is 11.042 ± 0.025 mm (0.4347 ± 0.0010 inch).
7	2	480-7205 Valve Seat	Diameter of inlet valve seat insert is 60.627 ± 0.015 mm (2.3869 ± 0.0006 inch).
			Bore in the cylinder head is 60.508 ± 0.025 mm (2.3822 ± 0.0010 inch).
			Face angle is 20.00 ± 0.25 degrees.
8	2	456-0411 Valve Seat	Angle of valve seat face is 45.00 ± 0.25 degrees.
			Outside diameter is 60.119 ± 0.015 mm (2.3668 ± 0.0006 inch).
			Bore in the cylinder head for valve seat insert is 60.000 ± 0.025 mm (2.3622 ± 0.0010 inch).
			Depth of bore in the cylinder head for seat insert is 14.50 ± 0.15 mm (0.571 ± 0.006 inch).
B	-	-	Height from top of the cylinder head to top of the valve guide is 26.0 ± 1.0 mm (1.02 ± 0.04 inch).

Caterpillar Information System:

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