Connecting Rods and Pistons/Pistons and Connecting Rods DEGLAZE CYLINDER BORES NOTE: It is recommended that crankshaft be removed. If cylinder bores are to be deglazed with crankshaft installed in engine, put clean shop towels over crankshaft to protect journal and bearing surfaces from any abrasives. M36403 -UN-29JAN90 1. Deglaze cylinder bores using a flex-hone. M98,2030K,34 -19-10OCT85 ASSEMBLE PISTONS AND CONNECTING RODS IMPORTANT: Pistons must be installed on connecting rods from which they were removed. M36397 -UN-29JAN90 1. Identification marks on piston must be to the same side as marks on connecting rod. 2. Put clean engine oil on piston pin.
Install pin through piston and connecting rod. 3. Install snap rings. Be sure snap rings are fastened in groove all around. CTM2 (19APR90) 30-21 16, 18, 20 & 24HP Onan Engines M98,2030K,35 -19-10OCT85 AllTractorManuals.com 130495 NOTE: A cutaway of a cylinder bore is shown for clarity of photograph. 2. Use flex-hone as instructed by manufacturer to obtain 45˚ crosshatch pattern as shown. -UN-02DEC88 IMPORTANT: Do not use gasoline, kerosene, or commercial solvents to clean cylinder bores. Solvents will not remove all abrasives from cylinder walls. RW619 3. Remove excess abrasive residue from cylinder walls using a clean dry rag. Clean cylinder walls using clean white rags and water.
Continue to clean cylinder until white rags show no discoloration. M98,2025R,29 -19-31JUL84 30 21