G3500 Engines Caterpillar

Cylinder Head Valves

Usage:

G3508 2TJ

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Illustration 1	g03199716
Typical example

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Table 1
Specification for 190-5968 Cylinder Head Gp and 387-5211
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 ± 1.00 mm (2.618 ± 0.039 inch).
B	-	-	Height from the top of the cylinder head to the top of the valve guides is 26.0 ± 1.0 mm (1.02 ± 0.04 inch).
3	2	255-0897 Valve Guide	Bore of the exhaust valve guide before installation is 9.481 ± 0.008 mm (0.3733 ± 0.0003 inch).
4	2	191-6766 Valve Guide	Bore of the inlet valve guide before installation is 9.481 ± 0.008 mm (0.3733 ± 0.0003 inch).
5	2	307-4641 Exhaust Valve	Before assembly, coat the exhaust valve stems with clean engine oil. Stem diameter (C) is 9.441 ± 0.010 mm (0.3717 ± 0.0004 inch). Valve diameter (E) is 56.00 ± 0.15 mm (2.205 ± 0.006 inch). Face angle is 70.75 ± 0.25 degrees.
6	2	210-2542 Inlet Valve	Before assembly, coat the inlet valve stems with clean engine oil. Stem diameter (D) is 9.441 ± 0.010 mm (0.3717 ± 0.0004 inch). Valve diameter (F) is 56.00 ± 0.15 mm (2.205 ± 0.006 inch). Face angle is 19.40 ± 0.25 degrees.
7	2	191-6760 Valve Seat Insert	Diameter of exhaust valve seat insert is 60.132 ± 0.015 mm (2.3674 ± 0.0006 inch). Bore in the cylinder head is 60.000 ± 0.025 mm (2.3622 ± 0.0010 inch). Face angle is 20.25 ± 0.25 degrees.
8	2	266-8721 Valve Seat Insert	Diameter of inlet valve seat insert is 60.640 ± 0.015 mm (2.3874 ± 0.0006 inch). Bore in the cylinder head is 60.508 ± 0.025 mm (2.3822 ± 0.0010 inch). Face angle is 20.25 ± 0.25 degrees.

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