EXHAUST GP 4542093 - Caterpillar

GUIDELINES FOR REUSABLE PARTS; VALVES AND VALVE SPRINGS, Form SEBF8002, has the procedure necessary for checking used valves and valve springs.Valve clearance setting; engine stopped: Intake valve ... .018 in.(0.46 mm)Exhaust valve ... .030 in.(0.76 mm)(1) 7S6323 Spring (For engines with one valve spring): Length under test force ... 2.219 in.(56.36 mm)Test force ... 85 4 lb.(380 18 N)Use again minimum load at length under test force ... 77 lb.(340 N)Length of spring at valve open position ... 1.613 in.(40.97 mm)Use again minimum load at valve open position ... 201 lb.(894 N)Free length after test ... 2.613 in.(66.37 mm)Outside diameter ... 1.731 in.(43.97 mm)Spring must not be bent more than ... .091 in.(2.31 mm)(1) 9M5349 Spring (inner): Length under test force ... 1.791 in.(45.49 mm)Test force ... 20 1 lb.(90 4 N)Use again minimum load at length under test force ... 18 lb.(80 N)Length of spring at valve open position ... 1.178 in.(29.92 mm)Use again minimum load at valve open position ... 48 lb.(182 N)Free length after test ... 2.179 in.(55.35 mm)Outside diameter ... 1.125 in.(28.58 mm)Spring must not be bent more than ... .076 in.(1.93 mm)(1) 9M5350 Spring (outer): Length under test force ... 2.219 in.(56.36 mm)Test force ... 65 3 lb.(290 13 N)Use again minimum load at length under test force ... 59 lb.(260 N)Length of spring at valve open position ... 1.606 in.(40.79 mm)Use again minimum load at valve open position ... 166 lb.(740 N)Free length after test ... 2.574 in.(65.38 mm)Outside diameter ... 1.713 in.(43.51 mm)Spring must not be bent more than ... .090 in.(2.29 mm)(2) Diameter of valve stem: 7M7817 Intake Valve (new) ... .4955 .0005 in.(12.586 0.013 mm)Minimum permissible diameter of the valve stem (worn) ... .494 in.(12.55 mm)8H7097 Exhaust Valve (new) ... .4955 .0005 in.(12.586 0.013 mm)Minimum permissible diameter of the valve stem (worn) ... .494 in.(12.55 mm) (3) Thickness of valve lip: 7M7817 Intake Valve ... .1725 .0015 in.(4.382 0.038 mm)Minimum permissible valve lip ... .147 in.(3.73 mm)8H7097 Exhaust Valve ... .1725 .0015 in.(4.382 0.038 mm)Minimum permissible valve lip ... .140 in.(3.56 mm)(4) Angle of valve face ... 291/4°(5) Diameter of valve head: Intake valve ... 2.505 .005 in.(63.63 0.13 mm)Exhaust valve ... 2.350 .005 in.(59.69 0.13 mm) (6) Bore in valve guide after installation: Intake Bushing (Guide) ... .501 .001 in.(12.73 0.03 mm)Exhaust Bushing (Guide) ... .501 .001 in.(12.73 0.03 mm)Maximum permissible bore in valve guide: Intake valve (worn) ... .503 in.(12.78 mm)Exhaust valve (worn) ... .503 in.(12.78 mm)(7) Length of guide: Intake valve ... 5.06 in.(128.5 mm)Exhaust valve ... 5.44 in.(138.2 mm)(8) Depth of bore in head for valve seat insert ... .6365 .0010 in.(16.167 0.025 mm)(9) Bore in head for inlet valve seat insert* ... 2.5865 .0005 in.(65.697 0.013 mm) Diameter of inlet valve seat insert ... 2.5900