Fabricating and machining procedures for crankcases for locomotive diesel engines

摘要

Procedures for machining static crankcase structure, free of motive- drive components, and fabricating in-place preselected thickness gage endplates to provide crankcases for continued use of two-cycle V- type diesel electric locomotive engines. In crankcase refabrication procedures, original endplates are removed and distal edges machined to preserve overall crankcase length within tolerance limits. Externally cut openings in peripheral air box side walls and removal of an upper portion of each endplate provide access to internal framework members for removal of the endplates. Power deck surfaces are machined uniformly and camshaft locations are determined trigonometrically responsive to such downward displacement of the power deck. The new endplates are welded in place, free of drilled or tapped drive component openings. Subsequent machining of the new endplates compensates for any existing vertical or transverse cant of each endplate. Stub shaft support and other openings for endplate support of drive components maintain their same angular and dimensional relationships to the relocated camshafts and crankshaft.