2. DIAGNOSING PROCEDURE 2. DIAGNOSING PROCEDURE To carry out troubleshooting efficiently, the following steps must be observed. STEP 1. Study the machine system STEP 1. Study the machine system Study and know how the machine is operating, how the system is composing, what kinds of function are installed in the machine and what are specifications of the system components by the machine service manual. Especially, deepen the knowledge for the related parts of the trouble. STEP 2. Ask the operator STEP 2. Ask the operator Before inspecting, get the full story of malfunctions from a witness --- the operator. 1) How the machine is used and when it is serviced?
2) When the trouble was noticed and what work the machine was doing at that time? 3) What is the phenomenon of the trouble? Was the trouble getting worse, or did it come out suddenly for the first time? Did the machine have any troubles previously? If so, which parts were repaired before. 4) STEP 3. Inspect the machine STEP 3. Inspect the machine Before starting troubleshooting, check the machine for the daily maintenance points as shown in the operator's manual.
And also check the electrical system including batteries, as the troubles in the electrical system such as low battery voltage, loose connections and blown out fuses will result in malfunction of the controllers causing total operational failures of the machine. ON THE INSPECTION 5-2