COMMON AR 3974127 - Caterpillar

Guidelines For Reusable Parts; Valves And Valve Springs, Forms SEBF8002 and SEBF8034 have the procedure and specifications necessary for checking used valves and valve springs.(1) 4N5906 Spring for valves with a single spring (new): Length under test force ... 54.99 mm (2.165 in)Test force ... 344 34 N (77.3 7.6 lb)Use again minimum load at length under test force ... 291 N (65.4 lb)Length of spring at valve open position ... 42.93 mm (1.690 in)Use again minimum load at valve open position ... 817 N (183.6 lb)Free length after test ... 62.7 mm (2.47 in)Outside diameter ... 31.75 mm (1.250 in)Spring must not be bent more than ... 2.18 mm (.086 in)(1) 4W2471 Spring for valves (outer) (new): Length under test force ... 53.24 mm (2.096 in)Test force ... 245 24 N (55 5 lb)Use again minimum load at length under test force ... 211 N (48 lb)Length of spring at valve open position ... 39.0 mm (1.54 in)Use again minimum load at valve open position ... 755 N (170 lb)Free length after test ... 59.5 mm (2.34 in)Outside diameter ... 37.31 mm (1.469 in)Spring must not be bent more than ... 2.1 mm(.083 in)(1) 4W2472 Spring for valves (inner) (new): Length under test force ... 50.24 mm (1.978 in)Test force ... 178 18 N (40 4 lb)Use again minimum load at length under test force ... 155 N (35 lb)Length of spring at valve open position ... 36.0 mm (1.42 in)Use again minimum load at valve open position ... 321 N (72 lb)Free length after test ... 65.7 mm (2.60 in)Outside diameter ... 25.13 mm (.989 in)Spring must not be bent more than ... 2.3 mm (.09 in)(2) Height to top of valve guide ... 32.3 0.8 mm (1.27 .03 in)(3) Diameter of valve stem (new) ... 9.441 0.008 mm (.3717 .0003 in)Use again minimum diameter of valve stems: 1W3860 Exhaust ... 9.408 mm (.3704 in)2W2622 Intake ... 9.408 mm (.3704 in)Bore in valve guide with guide installed in the head (new) ... 9.487 0.025 mm (.3735 .0010 in)Use again dimension for valve guide bore ... 9.538 mm (.3755 in)(4) Diameter of valve head: Exhaust valve ... 41.81 0.13 mm (1.646 .005 in)Intake valve ... 44.98 0.13 mm (1.771 .005 in)(5) Angle of intake valve face ... 29 1/4 1/4°Angle of exhaust valve face ... 44 1/4 1/4° (6) Depth of bore in head for valve seat insert ... 13.01 0.15 mm (.512 .006 in)(7) Diameter of valve seat insert for intake valve ... 46.025 0.013 mm (1.8120 .0005 in) Bore in head for valve seat insert for intake valve ... 45.949 0.025 mm (1.8090 .0010 in)Diameter of valve seat insert for exhaust valve ... 42.850 0.013 mm (1.6870 .0005 in)Bore in head for valve seat insert for exhaust valve ... 42.774 0.025 mm (1.6840 .0010 in)(8) Angle