SHAFT 1T0548 - Caterpillar

Guidelines For Reusable Parts; Valves And Valve Springs, SEBF8002 and SEBF8034 have the procedure and specifications necessary for checking used valves and valve springs.(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)Length of spring at valve open position ... 39.0 mm (1.54 in)Use again minimum load at valve open position ... 805 40 N (181 9 lb)Free length after test ... 59.5 mm (2.34 in)Outside diameter ... 37.31 mm (1.469 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)Length of spring at valve open position ... 36.0 mm (1.42 in)Use again minimum load at valve open position ... 343 17 N (77 4 lb)Free length after test ... 65.7 mm (2.60 in)Outside diameter ... 25.13 mm (.989 in)(2) Height to top of valve guide ... 27.2 0.8 mm (1.07 .03 in)(3) Diameter of valve stem (new) ... 9.441 0.010 mm (.3717 .0004 in)Use again minimum diameter of valve stems:Exhaust ... 9.408 mm (.3704 in)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 [measured 19.05 mm (.750 in) from end of guide] ... 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 ... 291/4 1/4 degreesAngle of exhaust valve face ... 441/4 1/4 degrees (6) Depth of bore in head for valve seat insert ... 13.01 0.35 mm (.512 .014 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 of face of intake valve seat insert ... 30 1 degreesAngle of face of exhaust valve seat insert ... 45 1 degrees(9) Dimension from end of closed valve to machined face of head. Maximum permissible dimension:New Inlet & Exhaust valves.Below (recessed from) machined face ... 1.22 mm (.048 in)Above (extended from) machined face ... 0.04 mm (.0016 in)Reconditioned Inlet & Exhaust valves.Below (recessed from) machined face ... 1.70 mm (.067 in)Above (extended from) machined face ... 0.04 mm (.0016 in)(10) Outside diameter of the face of the valve seat insert: Exhaust seat ... 39.268 0.013 mm (1.5460 .0005 in)Intake seat ... 40.894 0.013 mm (1.6100 .0005 in)(11) "Use again" thickness of valve lip: Exhaust valve ... 2.06