CONE-BEARING 3P6371 - Caterpillar

Note: The Reuse and Salvage Guidelines, "Valve and Valve Spring Specifications" has the necessary procedure and specifications for checking used valves and springs.
Illustration 1 g01381203
(1) 4N-5906 Spring Length under test force ... 54.99 mm (2.165 inch) Test force ... 344 34 N (77 7.6 lb) Free length after test ... 62.74 mm (2.470 inch) Outside diameter ... 31.75 mm (1.250 inch) (A) Height to top of valve guide ... 32.26 mm (1.270 inch)Note: Apply clean engine oil to the valve stems prior to installation in the cylinder head. (B) Diameter of new valve stem ... 9.441 0.010 mm (0.3717 0.0004 inch)The minimum diameter of the valve stems for use in the cylinder head Exhaust valves ... 9.309 mm (0.3665 inch) Inlet valves ... 9.309 mm (0.3665 inch) Bore in the new valve guide that is installed in cylinder head ... 9.487 0.020 mm (0.3735 0.0008 inch) (C) Diameter of valve head Exhaust valve ... 41.81 0.13 mm (1.646 0.005 inch) Inlet valve ... 44.98 0.13 mm (1.771 0.005 inch) (D) Angle of valve face Exhaust valve ... 44.25 0.25 degrees Inlet valve ... 29.25 0.25 degrees
Illustration 2 g01381208
(E) Diameter of valve seat insert Exhaust valve ... 42.850 0.013 mm (1.6870 0.0005 inch) Inlet valve ... 46.025 0.013 mm (1.8120 0.0005 inch) (F) Depth of bore in cylinder head for new valve seat insert ... 15.7 0.5 mm (0.62 0.02 inch)Bore in cylinder head for valve seat insert Exhaust valve ... 42.774 0.025 mm (1.6840 0.0010 inch) Inlet valve ... 45.949 0.025 mm (1.8090 0.0010 inch) (G) Projection height of the valve Maximum permissible projection of the inlet valves and the exhaust valves from the face of the cylinder head ... −1.219 to 0.203 mm (−0.0480 to 0.0080 inch) (H) Angle of face of valve seat insert Exhaust valve ... 44.75 0.50 degrees Inlet valve ... 30.25 0.50 degrees (J) Outside diameter of the face of the valve seat insert Exhaust seat ... 39.268 mm (1.5460 inch) Inlet seat ... 40.894 mm (1.6100 inch)