SEAT-SPRING 5N8379 - Caterpillar

Illustration 1 g00114735
Typical example
(1) Height to the top of the valve guides ... 26.00 0.50 mm (1.024 0.020 inch) (2) 7N-1904 Spring Length under test force ... 56.4 mm (2.22 inch)Test force ... 254 25 N (57.1 5.6 lb)Free length after test ... 62.5 mm (2.46 inch)Outside diameter ... 43.96 mm (1.731 inch) (3) 7N-1903 Spring Length under test force ... 45.5 mm (1.79 inch)Test force ... 125 12 N (28 2.7 lb)Free length after test ... 51.5 mm (2.03 inch)Outside diameter ... 29.24 mm (1.151 inch) (4) Valve stem diameter and valve guide bore Diameter of the new valve stems in the area of the valve guide ... 9.441 0.008 mm (0.3717 0.0003 inch)When the valve guides are installed in the cylinder head the bore in the valve guides is the following value: ... 9.487 0.025 mm (0.3735 0.0010 inch)When the valve guides are installed in the cylinder head the maximum bore that can be used again in the valve guides is the following value: ... 9.540 mm (0.3756 inch) (5) Diameter of the valve heads ... 56.00 0.15 mm (2.205 0.006 inch) (6) Angle of the valve faces: Inlet ... 19.40 0.25 degreesExhaust ... 44.40 0.25 degrees
Illustration 2 g00122935
Typical example
(7) Depth of bore in head for valve seat inserts ... 14.00 0.15 mm (0.551 0.006 inch) (8) Diameter of valve seat inserts: Inlet ... 60.627 0.015 mm (2.3869 0.0006 inch)Exhaust ... 60.119 0.015 mm (2.3669 0.0006 inch)Bore in head for valve seat inserts Inlet ... 60.508 0.025 mm (2.3822 0.0010 inch)Exhaust ... 60.000 0.025 mm (2.3622 0.0010 inch) (9) Angle of face of valve seat inserts Inlet ... 20 0.25 degreesExhaust ... 45 0.25 degrees (10) Outside diameter of the face of the valve seat inserts ... 53.60 mm (2.110 inch)