35 4 DLT ENGINE Maximum run mm 0.030 0.030 out of valve seat with respect to valve stem Distance of mm 0.7/0.95 0.7/0.95 valve head from cylinder head mating surface with crank case Valve stem mm 0.05 to 0.060 to clearance 0.087 0.097 Permissible ovality 0.01 0.01 of valve seat VALVE GUIDES Stage Valve guide Valve guide bore in out side cylinder head diameter mm mm Standard 13.980/13.998 14.028/14.046 Standard 1 14.008/14.080 14.278/14.296 Valve guide inside diameter 7.980/7.995 mm Valve guide installation height (from spring washer seat) 16.25/16.30 mm PISTON GASKET IDENTIPROJECTION THICKNESS FICATION 0.45 to 0.55 mm 1.500 mm 1Notch 0.56 to 0.65 mm 1.600 mm 2 Notches 0.66 to 0.75 mm 1.700 mm 3 Notches MAXIMUM DIFFERENCE BETWEEN PISTON PROJECTIONS OF ANY TWO PISTONS IN CRANK CASE SHOULD NOT EXCEED 0.120 mm CYLINDER HEAD Permissible unevenness Length wise 0.030 mm of cylinder head mating Cross wise 0.015 mm surface VALVE DIMENSION INLET EXHAUST Valve head dia’A’ mm 38.02/38.5 33.00/33.20 Valve seat angle 450-30' 450-30' Valve stem dia’E mm 7.940/7.956 7.920/7.935 Maximum run mm 0.200 0.200 out of valve face with respect to valve stem Valve seat dia’C’ mm 36.9 31.000 Valve seat mm 2.25/2.45 2.1/2.3 distance from valve face ‘B’ Valve seat end mm 3.3/3.5 3.3/3.5 distance from valve face Fig. 62 Valve Dimension Fig. 63 Valve seat Dimension ø ø VALVE SEAT
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