HARNESS AS 9W9873 - Caterpillar

Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine.To prevent possible injury, perform the procedure that follows before testing and adjusting the power train.
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 work tools have been lowered to the ground, and the 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.
Perform a visual check on the hydrostatic system and a visual check on the components before troubleshooting a problem. Next, perform the performance tests and the operational checks. Finally, perform the instrument tests.To remove the hydraulic tank's filler cap, slowly turn the filler cap. If oil begins to escape from the hydraulic tank, allow the tank pressure to decrease before the oil filler cap is completely removed. Before any operational checks are made to the hydrostatic system, visually inspect the system.
Measure the level of the oil in the hydraulic tank.
Look for air in the oil that is in the hydraulic tank. Look for air in the oil immediately after the machine is stopped and the pressure has been relieved. Use a clear bottle in order to obtain a sample of the oil. Look for air bubbles in the oil that is in the bottle.
Check all oil lines, hoses and connections for damage or leaks.
Check for restrictions of flow. Check for sharp bends and clamps that are not installed correctly. Check for physical damage to hoses and lines.
Remove the filter elements. Use a 4C-5084 Filter Cutter to cut the filter element open. Spread apart the pleats and inspect the element for metal and for other debris. An excessive amount of debris in the filter element can indicate a possible failure. If metals are found in the filter element, a magnet can be used to differentiate between ferrous metals and nonferrous metals. Ferrous metals can indicate wear on steel parts and on cast iron parts. Small amounts of debris may be found in the filter element. This could be caused by friction and by normal wear. Consult your Caterpillar dealer in order to arrange for further analysis if an excessive amount of debris is found. Using an oil filter element that is not recommended by Caterpillar can result in severe damage to parts. This can result in larger particles in unfiltered oil. The particles could enter the lubricating system and the particles could cause damage.