C11 and C13 Engines Caterpillar

Cylinder Head Valves

Usage:

730C2 2L7

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Illustration 1	g03538778

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Table 1
Specification for 486-6227 Cylinder Head Gp
Item	Qty	Part	Specification Description
1	12	252-7802 Inlet Valve	Apply clean engine oil to the stem prior to installation. Diameter (B) is 9.441 ± 0.008 mm (0.3717 ± 0.0003 inch) Face angle (D) is 60.75 ± 0.25 degrees Valve head diameter (F) is 44.50 ± 0.13 mm (1.752 ± 0.005 inch)
2	12	394-4400 Exhaust Valve	Apply clean engine oil to the stem prior to installation. Diameter (C) is 9.441 ± 0.010 mm (0.3717 ± 0.0004 inch) Face angle (E) is 45.75 ± 0.25 degrees Valve head diameter (G) is 41.50 ± 0.13 mm (1.634 ± 0.005 inch)
3	24	224-4441 Spring	Length under test force is 50.47 mm (1.987 inch) Test force is 160 ± 13 N (36 ± 3 lb) Approximate free length after test is 64.1 mm (2.52 inch)
4	24	332-2152 Spring	Length under test force is 52.95 mm (2.085 inch) Test force is 320 ± 31 N (72 ± 7 lb) Approximate free length after test is 62.7 mm (2.47 inch)
5	24	268-2953 Valve Guide	Apply clean engine oil to the bore prior to installation. Bore before assembly is 9.508 ± 0.013 mm (0.3743 ± 0.0005 inch) Installation height (A) from the cylinder head surface to the step of the valve guide is 20.0 ± 0.5 mm (0.79 ± 0.02 inch)
6	12	260-4855 Valve Seat Insert	Insert angle is 29.75 ± 0.25 degrees Outer diameter is 45.525 ± 0.013 mm (1.7923 ± 0.0005 inch) Bore in the cylinder head is 45.461 ± 0.015 mm (1.7898 ± 0.0006 inch) Installation depth for valve seat insert is 6.40 ± 0.11 mm (0.251 ± 0.004 inch).
7	12	300-3566 Valve Seat Insert	Insert angle is 44.75 ± 0.25 degrees Outer diameter is 42.390 ± 0.013 mm (1.6689 ± 0.0005 inch) Bore in the cylinder head is 42.320 ± 0.015 mm (1.6661 ± 0.0006 inch) Installation depth for valve seat insert is 4.80 ± 0.11 mm (0.188 ± 0.004 inch).

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