G3500 Engines Caterpillar

Cylinder Head Valves

Usage:

G3516 4EK

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Illustration 1	g03194856

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Table 1
Specification for 123-8649 Cylinder Head Gp
Item	Qty	Part	Specification Description
1	4	7N-1904 Spring	Length under test force is 56.36 mm (2.219 inch). Test force is 245 ± 25 N (55 ± 6 lb). Free length after test is 62.50 mm (2.461 inch).
2	4	7N-1903 Spring	Length under test force is 45.49 mm (1.791 inch). Test force is 125 ± 12 N (28 ± 3 lb). Free length after test is 51.54 mm (2.029 inch).
A	2	7N-1902 Dowel	Extension is 66.50 ± 0.50 mm (2.618 ± 0.020 inch).
B	-	-	Height from the top of the cylinder head to the top of the valve guides is 26.0 ± 2.0 mm (1.02 ± 0.08 inch).
3	4	-	Before assembly, coat the valve stems with clean engine oil. Stem diameter (C) is 9.441 ± 0.010 mm (0.3717 ± 0.0004 inch). Valve diameter (D) is 56.00 ± 0.15 mm (2.205 ± 0.006 inch). Face angle is 70.75 ± 0.25 degrees.
4	2	184-5494 Valve Guide	Bore of the exhaust valve guide after installation is 9.467 ± 0.013 mm (0.3727 ± 0.0005 inch).
5	2	184-5495 Valve Guide	Bore of the inlet valve guide after installation is 9.467 ± 0.013 mm (0.3727 ± 0.0005 inch).
6	4	6I-1713 Valve Seat Insert	Diameter of valve seat insert is 60.132 ± 0.015 mm (2.3674 ± 0.0006 inch). Face angle is 20 degrees.

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