CORE AS-RADIATOR 4255949 - Caterpillar

Illustration 9 g00582106
(10) Outside diameter of the valve seat inserts Inlet valve ... 50.000 0.013 mm (1.9685 0.0005 inch) Exhaust valve ... 43.000 0.013 mm (1.6929 0.0005 inch)Diameter of the bore in cylinder head for the valve seat insertBore diameter Inlet valve ... 49.931 0.013 mm (1.9658 0.0005 inch) Exhaust valve ... 42.931 0.013 mm (1.6902 0.0005 inch) (11) Inside diameter of valve seat inserts Inlet valve ... 42.00 0.13 mm (1.654 0.005 inch) Exhaust valve ... 37.00 0.13 mm (1.457 0.005 inch)Note: The valve seat insert must be shrunk by reduced temperature before installing in the head. (12) Angle of the valve seat inserts Inlet valve ... 30.25 0.50 degrees Exhaust valve ... 45.50 0.50 degrees (13) Depth of the bore in the head for the valve seat insert ... 10.00 0.13 mm (0.394 0.005 inch) (14) Outside diameter of the seating face of the valve seat insert Inlet valve ... 44.029 0.085 mm (1.7334 0.0033 inch) Exhaust valve ... 38.077 0.046 mm (1.4991 0.0018 inch)Note: Do not reuse the valve seat inserts if the outside diameter of the valve seat insert is larger than the specified value. (15) The valve lips can be reused if the minimum dimensions for the valve lips are met. Inlet valve ... 1.80 mm (0.071 inch) Exhaust valve ... 1.50 mm (0.059 inch) (16) Distance from the head of the valve to the cylinder head face. The valve must be closed. Inlet valve Maximum permissible distance ... 2.05 mm (0.081 inch) Minimum permissible distance ... 1.13 mm (0.045 inch)Exhaust valve Maximum permissible distance ... 2.85 mm (0.112 inch) Minimum permissible distance ... 1.50 mm (0.059 inch) Type 4 Cylinder Head
Note: Type 1 cylinder heads have standard valve springs and valve seat inserts. Type 2 cylinder heads have longer exhaust valve springs and standard valve seat inserts. Type 3 cylinder heads have longer exhaust valve springs. The inlet valve seat inserts have smaller inside diameters. Type 4 cylinder heads have standard valve springs. The inlet valve seat inserts have smaller inside diameters.
Illustration 10 g00581757
Note: The inlet and exhaust valve stems must be coated with engine oil prior to installation in the cylinder head.Note: The tips of the inlet and exhaust valves must be coated with 8T-2998 Lubricant . The lubricant must be applied after assembly of the retainer. (1) Exhaust valve (2) Inlet valve (3) 7C-4273 Spring for inlet valve and Spring for exhaust valve Free length ... 71.0 mm (2.80 inch) Assembled length ... 65.9 mm (2.60 inch) Load at assembled length ... 217 22 N (49 5 lb) Minimum operating length ... 51.0 mm (2.01 inch) Load at minimum operating length ... 858 43 N (193 10 lb) (4) Seal (5) Height to the top of