BUSHING 4V8639 - Caterpillar

Illustration 1 g06253298
Table 1
Item Qty Part Specification Description
1 24 247-9908 Springs Length under test force is 67.12 mm (2.643 inch).
Test force is 320 25 N (71.9 5.6 lb).
Approximate free length after test is 76.70 mm (3.020 inch).
2 24 211-3122 Springs Length under test force is 60.14 mm (2.368 inch).
Test force is 150 12 N (33.7 2.7 lb).
Approximate free length after test is 71.70 mm (2.823 inch).
3 12 376-6566 Valve Guide Height (A) to the step that is in the valve guide is 35.0 0.5 mm (1.38 0.02 inch).
Before installation, bore in the exhaust valve guide is 9.502 0.013 mm (0.3741 0.0005 inch).
4 12 122-7375 Valve Guide Height (A) to the step that is in the valve guide is 35.0 0.5 mm (1.38 0.02 inch).
Before installation, bore in the inlet valve guide is 9.502 0.013 mm (0.3741 0.0005 inch).
Lubricate inner diameter of valve guides with 1E1867B clean engine oil immediately prior to valve installation in the cylinder.
5 12 490-7200 Exhaust Valve Face angle is 45.75 0.25 degrees.
Stem diameter is 9.441 0.010 mm (0.37169 0.00039 inch).
Valve head diameter is 41.81 0.13 mm (1.646 0.005 inch).
6 12 490-7199 Inlet Valve Face angle is 60.75 0.25 degrees.
Stem diameter is 9.441 0.010 mm (0.37169 0.00039 inch).
Valve head diameter is 47.00 0.13 mm (1.850 0.005 inch).
Shrink the valve seat inserts by reducing the temperature. Shrinking the valve seat inserts allows placement into the counterbore.
7 12 226-5561 Valve Seat Insert Angle of face of valve seat insert is 45.25 0.25 degrees.
Outside diameter is 42.840 0.013 mm (1.6866 0.0005 inch).
Depth of the bore in the cylinder head is 13.90 0.05 mm (0.547 0.002 inch).
Bore in the cylinder head is 42.774 0.025 mm (1.6840 0.0010 inch).
8 12 224-3983 Seat Insert Angle of face of valve seat insert is 30.25 0.25 degrees.
Outside diameter is 48.025 0.013 mm (1.8907 0.0005 inch).
Depth of the bore in the cylinder head is 14.00 0.05 mm (0.551 0.002 inch).
Bore in the cylinder head is 47.950 0.025 mm (1.8878 0.0010 inch).