4. Disassembly and reassembly894.3.2 Reassembly(1) Clean all partsClean all parts using by the cloth and diesel oil (or cleaning agent) before reassembly.NOTE:1) If the dust remain with the parts, engine may cause the seizing or damage.2) The cleaning agent removes even carbon adhering to disassembled parts.(2) Putting the cylinder block upside downPlace a wood block on the floor and put the cylinder block upside down (with the cylinder head mountingsurface facing down).(3) Inserting the tappetsCoat the inside of the cylinder block tappet holes and the outside circumference of the tappets withengine oil, and insert the tappets in the cylinder block.NOTE:Separate the tappets to make sure that they are reassembled in the same cylinder No. and intake/exhaust side as they came from.(4) Mounting the crankshaft1) The crankshaft and the crankshaft gear are shrinkfitted. If the crankshaft and the crankshaft gearhave been disassembled, they have to be shrinkfitted [heat the crank shaft gear to 180- 200 deg. Cin the hot oil and press fit to the crankshaft].2) Coat the crank journal part of the cylinder blockand the upper main bearing metal with oil and fitthe upper main bearing metal onto the cylinderblock.NOTE:1) Be sure not to confuse the upper and lower mainbearing metals. The upper metal has an oilgroove.2) When mounting the thrust metal, fit it so that thesurface with the oil groove slit faces outwards,crankshaft side.3) Coat the crankpins and the crank journals of thecrankshaft with engine oil and place it on the uppermain bearing metals.NOTE:1) Position so that the crankshaft gear is on thegear case side.2) Be careful not to let the thrust metal drop.(Removing main bearing and crankshaft)CrankshaftThrust metalMain bearing(Base)Cylinder blockMain bearingMain bearing bolt
