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6 SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS F2B Type F2B Type mm 1 X X1* 2.71 to 2.74 X 1 2 X Piston ring grooves X2 2.55 to 2.57 X 3 2 X X3 4.02 to 4.04 3 X *measured on ∅ of 112 mm Piston rings: S1* 2.575 to 2.595 1 S p lune seal S2 milled scraper rin 2.470 to 2.490 3 S milled scraper ring S3 3 975 to 3 990 spring S3 *measured on ∅ of 112 mm 3.975 to 3.990 1 0.115 to 0.165 Piston rings - 2 0.060 to 0.100 3 0.030 to 0.065 Piston rings _ X1 2 X Piston ring end gap in 3 2 X X X1 0.35 to 0.50 3 X X2 0.70 to 0.95 X3 0.30 to 0.60 1 ∅ Small end bush housing Ø1 49.975 to 50.000 1 ∅ ∅ 2 Big end bearing Ø2 1 Selection classes Ø2 2 3 77.000 to 77.030 77.000 to 77.010 ∅ 4 Small end bush diameter ∅ 3 outside ∅4 50.055 to 50.080 ∅ 3 inside ∅3 46.015 to 46.030 S Big end bearing shell S Red 2.000 to 2.010 Small end bush - housing 0.055 to 0.105 Piston pin - bush 0.015 to 0.036 Big end bearing shells 0.127 - 0.254 - 0.508 Connecting rod weight g. A 2865 to 2895 Class B 2896 to 2925 C 2926 to 2955 D Fitted in production only and not supplied as spares |