11 Pistons A : Part number B : Size mark (A, B) C : Weight mark : Front mark 16936 Timing Gears 1 Camshaft gear 2 No. 2 idler gear 3 No. 1 idler gear 4 Oil pump gear 5 Crankshaft gear 6 Air compressor drive gear or injection pump drive gear 7 No. 1 idler gear Each gear is stamped with a timing gear alignment mark (“ 1 2 3 ”, or “ 4 ”) to facilitate reassembly. 16937 Flywheel 1 Flywheel 2 Pilot bearing 3 Ring gear A : Angle scale, cylinder number 01934 11-5