thanks for answering swoop. Sometimes shows error 30, which is the same as a 10 and 20, but the engine pump,when shows 10 and 20.After clean the contacts of the contactor line, the error out less, so I changed the line contactor for if the coil is failing.Also change the wires to the motor direction, because the engine had idle speed changes, and the brushes were fine. Now go out the same mistakes but only when they stop the machine in neutral for a while and direccion stops.After time,when they starting again selecting rear or forward direction , shows the errors.The errors never been showing with the machine running,and never stops it when is working.
Sorry for my english and thank you again