SEAL 3980953 - Caterpillar

GUIDELINE FOR REUSABLE PARTS; VALVES AND VALVE SPRINGS, Form SEBF8002, has the procedure necessary for checking used valves and valve springs.(1) 9M5350 Spring for valve (outer): Length under test force ... 2.219 in.(56.4 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.(40.8 mm)Use again minimum load at valve open position ... 166 lb.(740 N)Free length after test ... 2.574 in.(65.4 mm)Outside diameter ... 1.713 in.(43.5 mm)Spring must not be bent more than ... .090 in.(2.3 mm)(2) 9M5349 Spring for valve (inner): Length under test force ... 1.791 in.(45.5 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.(29.9 mm)Use again minimum load at valve open position ... 48 lb.(215 N)Free length after test ... 2.179 in.(55.3 mm)Outside diameter ... 1.125 in.(28.6 mm)Spring must not be bent more than ... .076 in.(1.9 mm)(3) Diameter of valve stem ... .4955 .0005 in.(12.586 0.013 mm) Minimum permissible diameter of valve stem ... .494 in.(12.55 mm)Bore in valve guide with guide installed in the head:Exhaust valve ... .5010 .0010 in.(12.725 0.025 mm)Intake valve ... .5010 .0010 in.(12.725 0.025 mm)Maximum permissible diameter of bore in valve guide:Exhaust valve ... .5025 in.(12.764 mm)Intake valve ... .5025 in.(12.764 mm)(4) Thickness of valve lip: Exhaust valve, minimum permissible ... .106 in.(2.69 mm)Intake valve, minimum permissible ... .158 in.(4.01 mm)(5) Diameter of valve head: Exhaust valve ... 2.282 .005 in.(57.96 0.13 mm)Intake valve ... 2.343 .005 in.(59.51 0.13 mm)(6) Angle of valve face ... 44° 30' 0° 15'(7) Depth of bore in head for valve seat insert ... .509 .001 in.(12.93 0.03 mm)(8) Diameter of valve seat insert ... 2.5030 .0005 in.(83.576 0.013 mm) Bore in head for valve seat insert ... 2.5000 .0005 in.(83.500 0.013 mm)(9) Angle of face of valve seat insert ... 45° 00' 0° 15' (10) Maximum permissible width of valve seat: Exhaust valve ... .197 in.(5.00 mm)Intake valve ... .160 in.(4.06 mm)(11) Dimension from top of closed valve to face of head: Maximum permissible dimension for exhaust valve ... .130 in.(3.30 mm)Minimum permissible dimension for exhaust valve ... .080 in.(2.03 mm)Maximum permissible dimension for intake valve ... .185 in.(4.70 mm)Minimum permissible dimension for intake valve ... .137 in.(3.48 mm)(12) Outside diameter of the face of the valve seat insert: Exhaust seat ... 2.2665 .0015 in.(57.569 0.038 mm)Maximum permissible, exhaust seat ... 2.291 in.(58.19 mm)Intake seat ... 2.3195 .0015 in.(58.915 0.038 mm)Maximum permissible, intake seat ... 2.343 in.(59.51 mm)(13) Angle to grind seat face of the insert to get a reduction of maximum seat diameter ... 15°