Crankcase (1) Inspect the outside and inside surfaces for evidence of cracking. VisuaUy examine the cylinder bores for scuffing, rusting, erosion or any abnormal wear. Using a straightedge, check the top face (for mating with cylinder head), front face (for mating with front plate) and rear face (for mating with rear plate) for flatness. (2) Make sure that the top face of the crankcase is flat within the standard specified below. If the standard is found to be exceeded, reface the top by using a surface grinder to make it flat within the specified standard. Specifications Unit:
mm (in.) Checking crankcase top for flatness Crankshaft (1) Journals (a) Inspect each journal for surface flaws such as roughing, scratches, pitting and bums, and, as necessary, repair the journals by grinding to the next undersize or replace the crankshaft. (b) Mike each journal to take a total of four read- ings to determine the wear, out-of-round and taper (cylindricity). If any of the limits is exceeded, repair by grinding to the next under- size or replace the crankshaft. Positions for miking journal -28- Item Standard Repair limit Warpage of crankcase gasketed surface 0.05, max. (0.0020) 0.20 (0.0079)