38 4 DLT ENGINE Maximum permissible 0.005 mm taper and ovality of con. rod small end bush inside dia Stage Connecting rod big Crank pin end bore diameter journal with bearing shell diameter mm mm Standard 50.02/50.04 49.98/49. 995 Standard1 49.92/49.94 49.88/49. 895 Repair 1 49.72/49.74 49.68/49.695 Repair 2 49.42/49.44 49.38/49. 395 Pre-tension of connecting rod 0.060/0.120 mm big end bearing shells Maximum permissible 5.000 gm difference in weight of connecting rods in one engine Connecting rod big end axial play 0.100/0.400 mm Connecting rod big end clearance 0.04 to 0.076mm Small end clearance 0.007 to 0.025 mm PRECOMBUSTION CHAMBER Pre-combustion chamber 32.043/32.073 mm collar out side diameter Pre-combustion chamber 32.000/31.975 mm collar bore in cylinder head Height of pre-combustion 4.020/4.030 mm chamber collar Height of pre-combustion 4.000/4.020 mm chamber collar bore in cylinder head Projection of pre-combustion 0.000/0.030 mm chamber above cylinder head mating surface with crank case INJECTION NOZZLE Nozzle opening pressure (bar) LUCAS MICO New 143 to 152 135 to 140 Old At least 140 At least 132 Maximum permissible variation in injection nozzle pressure LUCAS - 140 - 150 bar & MICO - 132 - 143 bar OIL PUMP (dimensions) Maximum distance from drive 86.3 mm gear face to sprocket face. Distance between drive gear 0.1/0.2 mm and drive shaft end Axial play of assembly drive shaft 0.04/0.08 mm Backlash between oil 0.15/0.25 mm pump gears Bore diameter in oil pump 12.000/12.010 mm housing for drive gear shaft Bore diameter of sprocket gear 11.950/11.960 mm Bore diameter of drive gear 11.945/11.960 mm Shaft diameter of drive gear 11.975/11.985 mm Shaft diameter of driven gear 11.925/11.935 mm Bore diameter for driven gear 11.900/11.910 mm shaft in housing Oil Pump Pressure Relief Valve - Opening Pressure 7 + 0.5 bar
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