TROUBLESHOOTING / Diagnosing Procedure DIAGNOSING PROCEDURE These six basic steps are essential for efficient troubleshooting: 1. Study the System Study the machine’s technical manuals. Know the system and how it works, and what the construction, functions and specifications of the system components are. 2. Ask the operator Before inspecting, get the full story of malfunctions from the operator below. (a) How is the machine being used? (Find out if the machine is being operated correctly) (b) When was the trouble noticed, and what types of work the machine doing at that time? (c) What are the details of the trouble? Is the trouble getting worse, or did it appear suddenly for the first time?
(d) Did the machine have any other troubles previously? If so, which parts were repaired before? 3. Inspect the machine Before starting the troubleshooting procedure, check the machine’s daily maintenance points, as shown in the operator's manual. Also, check the electrical system, including the batteries, as troubles in the electrical system such as low battery voltage, loose connections and blown fuses will result in malfunction of the controllers, causing total operational failure of the machine. If troubleshooting is started without checking for blown fuses, a wrong diagnosis may result, wasting time. Check for blown fuses before troubleshooting.
Even if a fuse looks normal by visual inspection, a fine crack is difficult to find. Always use a tester when checking the fuses. T107-07-01-001 T107-07-01-002 T107-07-01-003 T5-1-2