PLATE 2023751 - Caterpillar

Troubleshooting Procedure
There are six steps to troubleshooting:
Know the machine.
Understand the symptom.
Verify the symptom.
Determine the probable causes.
Reduce the list of probable causes.
Test the system.Use these steps to troubleshoot this machine.Know the Machine
Understand the operation of the machine. Know if the symptom is a characteristic of normal operation or if the symptom is a failure.Read the systems operation information in order to understand the systems of the machine. You must understand the interaction of the machine systems.Understand the Symptom
You need to speak with the operator about the symptom.
Ask about the performance of the machine prior to the failure.
Determine the time of the first occurrence of the symptoms.
Determine the operating conditions at the time of the failure.
Ask the operator about the sequence of events prior to the failure. Determine the order of the occurrences.
Ask the operator about the steps that have been taken to troubleshoot the machine.
Check the history of repairs of the machine.
Ask about the preventive maintenance of the machine. Many failures are due to poor maintenance.Inspect the machine. Look for problems. Notice any unusual odors in the air. Listen for unusual noises.Verify the Symptom
Operate the machine. When possible, repeat the conditions which caused the failure. Check the gauges inside the cab. Notice any unusual odors in the air. Listen for unusual noises.Determine the Probable Causes
Use the information from the first three steps to create a list of probable causes. Determine the subsystem that is the cause of the symptom. Use the list of probable causes in the troubleshooting section as a guide.Reduce the List of Probable Causes
List the probable causes in order of probability. Identify the probable causes that are easy to verify. When possible, eliminate probable causes that are easy to check.Test the System
Use pressure tests and operational tests to verify the cause of the symptom. Once the cause has been identified, repair the failure. Then, test the system again.Use of this Manual
This manual will help you determine the cause of the symptom that is occurring. This manual will also refer to the disassembly and assembly procedure when repairs are necessary.Once the symptom is understood, go to the troubleshooting section of this manual. The troubleshooting section contains lists of probable causes for different symptoms.This list cannot provide all of the probable causes for a symptom. You must find the actual cause for the symptom. Then, you must repair the failure.