Crankshaft and Main Bearings/Crankshaft and Main Bearings 4. Remove oil seal (A) using a 2 in. driver disk. M36345 -UN-29JAN90 CTM2 (19APR90) 35-7 16, 18, 20 & 24HP Onan Engines M98,2035K,16 -19-10OCT85 AllTractorManuals.com 130495 3. Measure main bearing diameter and main bearing clearance (bearing I.D. minus journal O.D.). MAIN BEARING SPECIFICATIONS Item New Part Wear Tolerance -UN-29JAN90 Bearing I.D.
B43E,B43G,B48G, 50.838—50.902 mm 50.930 mm T260 Engines (2.0015—2.0040 in.) (2.0051 in.) M36343 Bearing Clearance B43E,B43G,B48G, 0.064—0.097 mm 0.145 mm T260 Engines (0.0025—0.0038 in.) (0.0057 in.) Bearing I.D.— P218G and P220G 50.06—50.88 mm 50.94 mm Engine (2.0024—2.0034 in.) (2.0055 in.) Bearing Clearance P218G and P220G 0.061—0.106 mm 0.156 mm -UN-29JAN90 Engine (0.0024—l0.0042 in.) (0.006 in.) If bearing diameter exceeds 50.930 mm (2.0051 in.), replace bearing. M36344 If bearing clearance exceeds 0.145 mm (0.0057 in.), replace bearing or grind crankshaft journals. Install undersize bearings.
If bearing diameter and clearance are within specifications and bearings are not damaged, bearings can be reused. M98,2035K,15 -19-12FEB87 35 7