SWITCH AS-PRESSURE 9W3187 - Caterpillar

Illustration 1 g01138576
Note: The inlet and exhaust valve stems must be coated with engine oil prior to installation in the cylinder head.Note: The tips of the inlet and exhaust valves must be coated with 8T-2998 Lubricant. The lubricant must be applied after assembly of the retainer. (1) Exhaust valve (2) Inlet valve (3) 137-6718 Spring for exhaust valve Free length ... 92.08 mm (3.625 inch) Assembled length ... 80.27 mm (3.160 inch) Load at assembled length ... 662 33 N (150 7 lb) Minimum operating length ... 66.27 mm (2.609 inch) Load at minimum operating length ... 1445 58 N (325 13 lb) (4) 140-6188 Spring for inlet valve Free length ... 67.5 mm (2.66 inch) Assembled length ... 60.4 mm (2.38 inch) Load at assembled length ... 302.5 18 N (68 4 lb) Minimum operating length ... 46.4 mm (1.83 inch) Load at minimum operating length ... 898.5 36 N (200 8 lb) (5) Height to the top of the valve guides Inlet valves ... 23.00 0.50 mm (0.906 0.020 inch) Exhaust valves ... 17.80 0.50 mm (0.701 0.020 inch) Diameter of inlet valve guide ... 13.030 0.008 mm (0.5130 0.0003 inch) Diameter of exhaust valve guide ... 16.000 0.008 mm (0.6299 0.0003 inch)Note: Install the valve guide from the spring side of the cylinder head.Note: Assemble the valve guide. Seat the seal against the top of the valve guide. (6) Valve stem diameter ( new) Inlet valves ... 8.000 0.008 mm (0.3150 0.0003 inch) Exhaust valve ... 9.441 0.010 mm (0.3717 0.0004 inch)The cylinder head valves can be reused if the minimum dimensions for the valve stems are met.Minimum diameter of a valve stem ( worn) Inlet valve ... 7.965 mm (0.3136 inch) Exhaust valve ... 9.408 mm (0.3704 inch)After installation into the cylinder head, the valve guide bore is the following value.Diameter of the valve guide bore ( new) Inlet valve ... 8.072