TUBE 4N3108 - Caterpillar

Illustration 1 g01335203
Typical example
The valve spring (1) may be used on the inlet valve or the exhaust valve. When the valve springs are replaced the valve springs must be replaced in pairs.
Table 1
The load for the valve spring The length of the valve spring
161.5 to 178.5 N (36.3 to 40.1 lb) 31.5 mm (1.2402 inch)
337.9 373.5 N (76 84 lb) 21.5 mm (0.8465 inch)
Illustration 2 g01335204 (2) Valve face angle Inlet ... 30 degreesExhaust ... 45 degrees (3) Valve stem diameter Inlet ... 5.942 to 5.957 mm (0.2339 to 0.2345 inch)Exhaust ... 5.927 to 5.942 mm (0.2333 to 0.2339 inch)Clearance Maximum clearance of the inlet valve stem ... 0.05 mm (0.0020 inch)The service limit for the inlet valve stem ... 0.08 mm (0.0031 inch)Clearance Maximum clearance of the exhaust valve stem ... 0.065 mm (0.0026 inch)The service limit for the inlet valve stem ... 0.09 mm (0.0035 inch) (4) Length of valve Inlet valve ... 107.925 to 108.375 mm (4.2490 to 4.2667 inch)Exhaust valve ... 107.703 to 108.153 mm (4.2403 to 4.2580 inch) (5) Valve head Diameter of inlet valve head ... 35 mm (1.3780 inch)Diameter of exhaust valve head ... 33 mm (1.2992 inch)