EDGE-CUTTING 2756025 - Caterpillar

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.
Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately 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 Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
If the oil becomes contaminated, premature component failure could result. Contaminated oil can also contribute to overheating.Use the following procedure in order to determine the contamination of the oil in the hydraulic system.
Illustration 1 g00895540
Hydraulic Sampling Valve
Obtain a hydraulic oil sample. Open the access panel for the rotor transmission control in order to get to the hydraulic sampling valve.Reference: Refer to Operation and Maintenance Manual, KEBU8003, "Sampling Interval and Location of Sampling Valve" for the correct procedure.
Check the hydraulic filter element for foreign materials by using Step 2.a through Step 2.d:
Check for bronze colored particles. Bronze colored particles give an indication of pump or motor port plate failure.
Check for shiny steel particles. Shiny steel particles give an indication of pump or motor piston failure.
Check for rubber particles. Rubber particles indicate a seal failure or a hose failure.
Check for aluminum particles. Aluminum particles give an indication of steering and/or charge pump failure.Note: If any of these particles are found in the hydraulic filter element, all components of the hydraulic oil system must be cleaned. Do not use any damaged parts. Any damaged parts must be removed and new parts must be installed.