ENGINE 35 Standard and repair sizes of camshaft eccentric for vacuum pump and connecting rod bearing Camshaft Bearing bore in Wall thickness of bearing eccentric dia installed condition shells ready for installation mm mm mm Standard 32.000-31.984 32.050-31.030 1.475-1.487 Standard – I 31.900-31.884 31.950-31.930 1.525-1.537 Repair size – I 31.750-31.734 31.800-31.780 1.600-1.612 Repair size – II 31.500-31.484 31.550-31.530 1.725-1.737 Radial clearance 0.030-0.066 mm Connecting rod small end parent bore 19.021/19.000 mm Connecting rod small end bush – outer dia 19.048/19.035 mm inner dia 15.7/15.6 mm Centre distance between big & small end bores 92.000/91.950 mm Out of parallelism of bearing bores of connecting rods 0.03 mm on 100 mm Width of connecting rod on big end and small end 21.935/21.883 mm Axial play (end play) of connecting rod 0.065-0.317 mm Maximum permissible piston projection beyond cylinder liner parting 0.1 - 0.3 mm surface ENGINE LUBRICATION SYSTEM : Fig.11. Bore diameter in housing for drive shaft ‘A’ 17.018/17.000 mm Diameter of drive shaft ‘A’ 16.984/16.973 mm Bore diameter in drive and driven gear for drive shaft ‘A’ 16.962/16.944 mm Diameter of idler shaft ‘B’ 15.034/15.025 mm Diameter of bore in housing for idler shaft. ‘B’ 15.018/15.000 mm Bore diameter of idler gear for idler shaft ‘B’ 15.073/15.055 mm Installation height of idler shaft in housing ‘D’ 39.2 + 0.3 mm Height of oil pump gear 39.960/39.926 mm Height of gear wheel housing 40.025/40.000 mm Installation height of driven gear on drive shaft 0.5-0.8 mm Maximum permissible axial play of oil pump drive shaft ‘E’ 0.04 mm Diametral clearance between drive-shaft and oil pump housing bore 0.016-0.045, mm Interference between drive shaft and drive/driving gear 0.011-0.040 mm Diametral clearance between idler gear and idler shaft 0.021-0.048 mm Interference between idler shaft and housing 0.007-0.034 mm Radial clearance between housing and gear tip 0.030-0.105 mm Axial clearance between housing cover and gear 0.040-0.099 mm Backlash between driven and idler gears 0.15-0.25 mm Backlash between oil pump drive gear and camshaft gear 0.18-0.34 mm
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