CONTROL GP-UNPROGRAMMED 3353789 - Caterpillar

General Information
When you are defining a problem with the hydraulic system, the following procedure should be followed:
Prepare the machine for service.
Perform the visual inspection.
If the problem has not been identified, perform the operational checks that apply to your machine.
Perform any applicable calibration procedures that apply to your machine.
If the problem is not fully understood, perform the instrument tests.
When the problem is defined, go to the Troubleshooting Section. Troubleshooting information can be found in this manual or in a separate Troubleshooting manual for this machine. The Troubleshooting Section lists the probable causes of a known problem. As there may be more than one cause for a problem, the Troubleshooting information may suggest specific inspections or instrument tests be done. These inspections and tests help identify the most probable causes of a problem. The list cannot give all possible problems and corrections. Locations of the pressure taps and of the components are given in the Systems Operation portion of this manual. Pressure taps are also identified in the individual Test and Adjustment procedures.Note: The monitoring system for your machine accesses many values that are useful in troubleshooting the hydraulic system. When the situation is appropriate, use the monitoring system in order to find a pressure or determine a system problem.Warnings
Refer to the following warnings and notices for all inspections and test of the hydraulic system.
Sudden movement of the machine or release of oil under pressure can cause serious injury to persons on or near the machine.To prevent possible injury, perform the procedure that follows before testing and adjusting the hydraulic system.
Personal Injury or death can result from improperly checking for a leak.Always use a board or cardboard when checking for a leak. Escaping fluid under pressure, even a pin hole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into the skin, it must be treated immediately by a doctor familiar with this type of injury.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Personal injury can result if the machine moves while testing.If the machine begins to move during test, reduce the engine speed immediately and engage the parking brake.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to