PISTON GP 5081894 - Caterpillar

Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
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, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
ReferenceBefore you perform this procedure, refer to Testing and Adjusting, "Machine Preparation for Troubleshooting" for machine preparation.A visual inspection is the first step of troubleshooting. Park the machine on a hard level surface. Move the implement controls to HOLD. Turn the engine start switch OFF. Engage the parking brake and chock the wheels. Ensure that the work tools are resting on the ground.
Check the level of the oil in the hydraulic tank. Refer to the Operation and Maintenance Manual, "Hydraulic System Oil Level - Check".
Inspect all of the hydraulic components for leaks or for damage.
Inspect all hydraulic lines and connections for damage and for leaks. Check the hydraulic lines for signs of chafing.
Check for flow restrictions. Flow restrictions include acute bends in the oil lines, clamps that are not installed correctly and physical damage to hoses and to pipes.
Inspect all of the control linkages for damage.
If additional inspection is required, remove the filter element. Cut the filter in order to inspect the element. look for particles on the filter element. Use a magnet to separate ferrous particles (iron) from nonferrous particles (piston rings, O-ring seals, etc).