PILOT ASSEM. 8P8570 - Caterpillar

Illustration 1 g02557379
Table 1
Specification for the 328-7083 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 is 42.0 0.5 mm (1.65 0.02 inch).
Bore in the new valve guide for the intake valve after installation 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 2 254-2073 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 2 333-9179 Valve Seat Insert Angle for the face of the valve seat inserts is 20.00 0.25 degrees.
Outer diameter of the inlet valve seat insert is 67.150 0.013 mm (2.6437 0.0005 inch).
Bore in the cylinder head for the inlet valve seat insert is 66.995 0.020 mm (2.6376 0.0008 inch).
Depth of the bore in the cylinder head for the valve seat inserts is 14.03 0.15 mm (0.552 0.006 inch).
7 2 333-9180 Valve Seat Insert Angle for the face of the valve seat inserts is 45.00 0.25 degrees.
Outer diameter of the exhaust valve seat insert is 66.900 0.013 mm (2.6339 0.0005 inch).
Bore in the cylinder head for the exhaust valve seat insert is 66.745 0.020 mm (2.6277 0.0008 inch).
Depth of the bore in the cylinder head for the valve seat inserts is 14.63 0.15 mm (0.576 0.007 inch).