LATCH AS 4570525 - Caterpillar

Illustration 1 g01441028
Typical exampleNote: Before assembly, coat the inlet valve stems and the exhaust valve stems with clean engine oil. (A) Height from the top of the cylinder head to the top of the valve guides ... 26.0 1.0 mm (1.02 0.04 inch) (1) 281-6157 Spring Quantity ... 4 Length under test force ... 59.29 mm (2.334 inch) Test force ... 562.0 28.0 N (126.3 6.3 lb) Free length after test ... 75.8 mm (2.98 inch) Outside diameter ... 43.47 mm (1.711 inch) (2) 194-4902 Spring Quantity ... 4 Length under test force ... 50.34 mm (1.982 inch) Test force ... 146.0 7.3 N (32.8 1.6 lb) Free length after test ... 60.7 mm (2.39 inch) Outside diameter ... 30.70 mm (1.209 inch) (3) Install the two valve stem seals to the inlet valves. (4) Install the two washers to the exhaust valves. (B) Dimension for the valves Diameter of the inlet valve stems ... 9.441 0.010 mm (0.3717 0.0004 inch) Diameter of the exhaust valve stems ... 12.464 0.025 mm (0.4907 0.0010 inch) (C) Bore in cylinder 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) (5) Valve guide Bore of the inlet valve guide after installation ... 9.487 0.025 mm (0.3735 0.0010 inch) Bore of the exhaust valve guide after installation ... 12.619 0.025 mm (0.4968 0.0010 inch) (D) Valve face angles Inlet ... 19.40 0.25 degrees Exhaust ... 44.40 0.25 degrees (E) Diameter of the valve heads ... 56.00 0.15 mm (2.205 0.006 inch)
Illustration 2 g01441032
Typical example (F) Diameter of the 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) (G) Angle of the face of valve seat inserts Inlet ... 20.00 0.25 degrees Exhaust ... 45.00 0.25 degrees (H) Depth of bore in cylinder head for valve seat inserts ... 16.00 0.15 mm (0.630 0.006 inch) (J) Outside diameter of the face of the valve seat inserts ... 53.6 mm (2.11 inch)