COMPRESSOR GP 0R8679 - Caterpillar

General Tips
Check the following items when you are troubleshooting.
Make sure that all of the required components are responding.Use the "Diagnostics" dialogs to check components.
Make sure that the components have the correct versions of firmware loaded.Use the "Diagnostics" dialog and the Program Log in order to check this. Refer to Operation and Maintenance Manual, "Diagnostics - View".
Make sure that all of the cable connections are secure and undamaged.
Watch for errors or warnings.Make a note of any messages that appear on the screen. You can also check the program log.
Find out the steps performed that led to the problem.
Check if the steps that created the problem can be repeated.Automatic Controls Troubleshooting Tips
In general, problems with automatic controls fall into two groups:
Error conditions or system states that cause automatic control to be suspended, or that prevent you from turning on automatic controls
Automatic control behavior that causes poor quality or inaccurate finished surfacesError Conditions And System States
In order to troubleshoot automatic control error and state problems, use the information in Operation and Maintenance Manual, SEBU8502, "Automatic Control System" in order to check the state of the system against the list of states that prevent automatic controls to be used.Also, use the information in Operation and Maintenance Manual, SEBU8502, "Flashing Messages" in order to understand any error messages that are displayed.Poor Results
It is beyond the scope of this manual to cover troubleshooting poor results in detail. However, when you talk about the problem with your site manager or Caterpillar dealer, consider the following possible causes:Poor Technique - Cutting too fast, trying to move too much material, or causing the machine to move awkwardly are the most significant cause of poor results. Poor Technique can extend the system beyond its design limits. Some common examples include the following:
Cutting a rough surface with a dozer at too high a speed. This can result in a rippled or wavy final surface.
Moving too much material with a dozer. This can cause the dozer to rock forward and overcut.Poor Automatic Control Tuning - An incorrect choice of valve speed, or bad valve calibration data, can result in poor automatic controls performance. Common tuning problems include the following:
The valve speed setting is too high, causing the cutting edge to continually overshoot the target surface and overcut
The valve calibration has produced bad data by, for example, using an inaccurate pivot distance measurement for a dozer, performing the calibration at low machine revs, or by manually moving the cutting edge during the valve calibration procedurePoor Guidance Information - Noisy or inaccurate guidance information can result in an uneven or inaccurate final surface. If you suspect poor guidance information, consider the following possible causes:
Incorrect Installation. For example, not setting the direction of the mainfall sensor in the mainfall sensor dialog correctly.
Inaccurate Machine Measure Up
Inaccurate Sensor Calibration
Inaccurate Benching
Inaccurate GPS Measurements From The GPS Base Station
Poor ATS Instrument Setup
Poor Laser Transmitter Setup
Multipath GPS Signal Reception
Poor Hydraulic System Performance.GPS Troubleshooting Tips
Before contacting your dealer or Caterpillar, verify the following information:
You have a GPS Receiver with