OPERATION AFTER REPAIRTESTING AND ADJUSTINGPROCEDURE FOR FIRST OPERATION AFTER REPAIRDo not run the electric set at rated rpmimmediately after repair. The following procedure canprevent new failures if the CAUSE of the first failurecondition was not correctly found.1.Disconnect wires (10 and 19) from regulatorassembly (A1). Cover the terminal of wires (10and 19) with insulation tape.2.Start the engine and run it at 1200 to 1250 rpm.The residual magnetism in the exciter field (L3)and the rotating field (L5) will give approximately3 to 4 volts as measured at terminals (20) and(22). If the controlled rectifier has a short circuit,the generator will give a higher output voltage.Install a new controlled rectifier (CR9).3.Stop the engine and connect wires (10 and 19)to spade terminals (10 and 9) of regulatorassembly (A1).4.Start the engine and run it at 1200 to 1250 rpm.The output voltage will be approximately 67 to70 percent of the generator rated voltage. If theoutput voltage is too high (much higher than 70percent of rated voltage), the failure is probablyin the regulator module (A1).5.With the engine running at a low idle rpm andthe generator giving a constant voltage(approximately 60 to 70 percent of ratedvoltage), move the governor control to let theengine come up gradually to rated rpm. Makean adjustment to the voltage level control (R2)until the generator is at rated voltage. Thegenerator is now ready to use.79
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