CAP ASSEM. 3S2638 - Caterpillar

Illustration 1 g03194856
Table 1
Specification for 123-8649 Cylinder Head Gp
Item Qty Part Specification Description
1 4 7N-1904 Spring Length under test force is 56.36 mm (2.219 inch).
Test force is 245 25 N (55 6 lb).
Free length after test is 62.50 mm (2.461 inch).
2 4 7N-1903 Spring Length under test force is 45.49 mm (1.791 inch).
Test force is 125 12 N (28 3 lb).
Free length after test is 51.54 mm (2.029 inch).
A 2 7N-1902 Dowel Extension is 66.50 0.50 mm (2.618 0.020 inch).
B - - Height from the top of the cylinder head to the top of the valve guides is 26.0 2.0 mm (1.02 0.08 inch).
3 4 - Before assembly, coat the valve stems with clean engine oil.
Stem diameter (C) is 9.441 0.010 mm (0.3717 0.0004 inch).
Valve diameter (D) is 56.00 0.15 mm (2.205 0.006 inch).
Face angle is 70.75 0.25 degrees.
4 2 184-5494 Valve Guide Bore of the exhaust valve guide after installation is 9.467 0.013 mm (0.3727 0.0005 inch).
5 2 184-5495 Valve Guide Bore of the inlet valve guide after installation is 9.467 0.013 mm (0.3727 0.0005 inch).
6 4 6I-1713 Valve Seat Insert Diameter of valve seat insert is 60.132 0.015 mm (2.3674 0.0006 inch).
Face angle is 20 degrees.