OPERATOR AR 3966835 - Caterpillar

Know the Machine
Understand the machine operation. Know if the symptom is a characteristic of normal operation or a failure.Use Available Service Literature
Use all available service literature to understand the machine systems and perform troubleshooting. Read the Systems Operation manual to understand the machine systems. Understand machine system interactions.Understand the Symptom
Speak with the operator about the symptom and acquire the following Information:
Machine performance prior to the failure
Symptom first occurrence
Operating conditions at the time of the failure
Sequence of events prior to the failure
Troubleshooting steps that have been taken
Machine repair history
Machine preventive maintenance
Related specific serial number service information
Inspect the machine for problems and unusual odors or noisesVerify the Symptom
When possible, duplicate the symptom. Operate the machine and repeat the conditions that caused the failure. Check the gauges, look for unusual indications.Determine if an electronic control module (ECM) has detected any faults. A diagnostic code is used to specify each detected fault.Determine Possible Causes
Use the information from the operator and your inspection. If there is more than one symptom, identify a common cause.Test and Repair the System
Use the tests and procedures in this manual to verify the cause of the symptom. Once the cause has been identified, repair the failure. Then, test the system again to verify that the problem is resolved.Provide Feedback to Caterpillar®
Share your troubleshooting information. Provide Caterpillar® feedback after the correct repair has been performed. Use the form in the Service Information System (SIS) web site or Component Based Troubleshooting (CBT) feedback to communicate with Caterpillar. Write a brief description about the symptom, testing, and repair. Include your phone number or e-mail address so you can be contacted. This feedback helps Caterpillar improve service information.