Try to find the best repair manual for specs on engine rebuild and on rebuilding main control valve
TM1932 - Operation and Test manual. For diagnostics, schematics, theory of operation for the machine. TM1933 - Repair manual for the machine. Assembly/disassembly procedures and specs for the machine CTM104 - Manual for the base engine. Theory, specs, diagnostics, assembly/disassembly. CTM331 - Manual for the engines with DE10 Injection system. Theory, specs, diagnostics, assembly/disassembly of the fuel system.