WASHER-THRUST 1541230 - Caterpillar

3508 (70Z),
3512 (67Z),
3516 (73Z) Low Speed Generator Set EnginesDescription of Change: A new intake valve and intake valve seat insert are used. Formerly, the same valve was used for both the intake and exhaust. This valve has a seat angle of 30 degrees. Both the intake and exhaust valve seats also had a seat angle of 30 degrees. The new intake valve and intake valve seat insert have a seat angle of 20 degrees. The new intake valve and seat will help reduce intake valve and seat wear. The new components will also help prevent the intake valve seat from receding into cylinder head.Adaptable To: The new 1047184 Intake Valve and 4P6776 Intake Valve Seat Insert, when used together, are direct replacements for the 7E4609 Intake Valve and 7E5862 Intake Valve Seat Insert. The new valve and seat are in effect with 3508 (70Z833), 3512 (67Z1048), 3516 (73Z603) Low Speed Generator Set Engines. The 1071822 Cylinder Head Assembly, which includes the new 4P6776 Intake Valve Seats, valve guides, and bridge dowels already pressed in, is available. Two new 1047184 Intake Valves must be ordered for use in this cylinder head assembly. The remainder of the components from the former cylinder head assembly can be reused in the new cylinder head assembly.
Dimensions For Grinding 1047184 Intake Valves And 4P6776 Intake Valve Seat Inserts
Illustration 1. Dimensions for grinding 1047184 Intake Valves. (A) is 19 1/4 1/4 degrees.
Illustration 2. Dimensions for grinding 4P6776 Intake Valve Seat Inserts. (B) is 20 1/4 1/4 degrees. (C) is 55.14 0.50 mm (2.171 .020 in).