GEAR-SUN 9P7757 - Caterpillar

Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact the skin.
Oil sampling valve (1) for the transmission oil is located near the transmission oil filter.SOS oil samples are to be taken when the engine is running and the oil is at operating temperature. The SOS oil analysis can be used two ways. Before the oil is drained for an oil change, the analysis indicates past transmission wear or contamination issues. If the SOS sample is taken at 24,140 km (15,000 ml) and the oil is not changed, the sample can be used as an indicator of the need for future oil and/or filter changes.Scheduled Oil Sampling (SOS)
Illustration 1 g02755496
Typical example of CX28 transmission (1) Pump outlet pressure coupler (S O S port)
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.
Illustration 2 g00687600
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.
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.
Use the following procedure to obtain an SOS oil sample.
Start the engine. Warm up the oil until the oil reaches 47° C (116° F).
Ensure that the transmission control is in the NEUTRAL position and place the throttle in the LOW IDLE position.
Remove the dust cap. Refer to Illustration 1. Obtain an oil sample from the 183-7264 Fluid Sampling Valve As or otherwise known as SOS tap using 169-8373 Fluid Sampling Bottle .
Stop the engine.
Check the hydraulic filter element for foreign materials.
Replace the hydraulic filter element.Refer to Special Publication, PEHP6001, "How To Take A Good Oil Sample" for more information about obtaining a sample of oil.Consult your Caterpillar dealer for complete information and assistance in establishing and SOS program for your equipment.Scheduled Oil Sampling (SOS) Analysis
Effective fluid cleanliness management is the single most important factor and single greatest opportunity in maximizing component life. Fluid cleanliness increases reliability and durability, and lowers component life cycle costs. Scheduled oil sampling (SOS) is an oil analysis