SCREW 1O2571 - Caterpillar

Illustration 1 g03826427
Table 1
Specification for the 439-5473 Cylinder Head Gp
Item Qty Part Specification Description
1 4 318-4785 Spring Length under test force is 88 mm (3.5 inch).
Test force is 810 40 N (182 9 lb).
Free length after test is 109.24 mm (4.301 inch).
2 4 318-4786 Spring Length under test force is 82.63 mm (3.253 inch).
Test force is 540 27 N (121 6 lb).
Free length after test is 102.77 mm (4.046 inch).
3 4 236-0544 Valve Guide Note:Before assembly to the cylinder head, apply clean engine oil to the outer diameter of the valve guide.
Height (A) to the top of the valve guide after installation is 42.0 0.5 mm (1.65 0.02 inch).
After installation bore in the new valve guide is 12.626 0.020 mm (0.4971 0.0008 inch).
4 2 273-1224 Inlet Valve Note :Before assembly to the valve guide, apply clean engine oil to the valve stem.
Diameter of the valve stem is 12.573 0.010 mm (0.4950 0.0004 inch).
Diameter of the valve head (B) is 58.50 0.15 mm (2.303 0.006 inch).
Valve face angle is 70.75 0.25 degrees.
5 2 433-1104 Exhaust Valve Note :Before assembly to the valve guide, apply clean engine oil to the valve stem.
Diameter of the valve stem is 12.464 0.025 mm (0.4907 0.0010 inch).
Diameter of the valve head (C) is 56.50 0.15 mm (2.224 0.006 inch).
Valve face angle is 45.60 0.25 degrees.
6 2 273-1223 Valve Seat Insert Diameter of inlet valve seat insert is 62.100 0.013 mm (2.4449 0.0005 inch).
Bore in the cylinder head is 62.000 0.015 mm (2.4409 0.0006 inch).
Face angle is 20.00 0.25 degrees.
Depth of the bore in the cylinder head for the valve seat inserts is 16.00 0.15 mm (0.630 0.006 inch).
7 2 331-3688 Valve Seat Insert Diameter of exhaust valve seat insert is 61.120 0.013 mm (2.4063 0.0005 inch).
Bore in the cylinder head is 61.000 0.015 mm (2.4016 0.0006 inch).
Face angle is 45.00 0.25 degrees.
Depth of the bore in the cylinder head for the valve seat inserts is 16.00 0.15 mm (0.630 0.006 inch).