HOSE AS 1482292 - Caterpillar

Illustration 1 g01623175
(1) Inlet valve (2) Exhaust valve (3) 255-8678 Spring Length under test force ... 47.35 mm (1.864 inch) Test force ... 465.0 23.3 N (104.5 5.2 lb) Approximate free length after test ... 77.9 mm (3.07 inch) Outside diameter ... 29.40 mm (1.157 inch) (4) 255-8677 Spring Length under test force ... 46.15 mm (1.817 inch) Test force ... 232.5 11.6 N (52.3 2.6 lb) Approximate free length after test ... 74.60 mm (2.937 inch) Outside diameter ... 21.00 mm (0.827 inch)Note: Before assembly of valve guide, coat the cylinder head bore for valve guide with clean engine oil.Note: Install the valve guide from the spring side of the cylinder head. Check the inside diameter of the valve guide for distortion after installation into the cylinder head. (5) Dimensions for the valve guides Outside diameter ... 13.030 0.008 mm (0.5130 0.0003 inch) Inside diameter ... 8.072 0.013 mm (0.3178 0.0005 inch)Note: After assembly of the valve guide into the cylinder head, install the seal onto the top of the valve guide.Note: Before assembly of cylinder head valves, coat the valve guide inside diameter with clean engine oil. (A) Diameter of valve stem ... 8.000 0.010 mm (0.3150 0.0004 inch) (B) Diameter of the valve head Inlet ... 41.50 0.13 mm (1.634 0.005 inch) Exhaust ... 37.50 0.13 mm (1.476 0.005 inch) (C) Valve face angle Inlet ... 29.50 0.25 degrees Exhaust ... 44.25 0.25 degrees
Illustration 2 g01623185
(D) Depth of the bore in the cylinder head for the valve seat insert Inlet ... 9.30 0.05 mm (0.366 0.002 inch) Exhaust ... 10.40 0.05 mm (0.409 0.002 inch)Note: The valve seat insert must be shrunk by reduced temperature before the valve seat insert is installed in the head. (E) Dimensions for the valve seat insert Diameter of the inlet valve seat insert ... 42.560 0.013 mm (1.6756 0.0005 inch) Bore in cylinder head for the inlet valve seat insert ... 42.500 0.015 mm (1.6732 0.0006 inch) Diameter of the exhaust valve seat insert ... 39.060 0.013 mm (1.5378 0.0005 inch) Bore in cylinder head for the exhaust valve seat insert ... 39.000 0.015 mm (1.5354 0.0006 inch)