LIGHTING GP-FLOOD 1363993 - Caterpillar

Do not check for leaks with your hands. Pin hole (very small) leaks can result in a high velocity oil stream that will be invisible close to the hose. This oil can penetrate the skin and cause personal injury. Use cardboard or paper to locate pin hole leaks.
Illustration 1 g01102304A visual inspection of the hydraulic system is the first step when a diagnosis of a problem is made. Stop the engine. Lower the bulldozer and the ripper to the ground. In order to remove the tank filler cap, slowly turn the filler cap until the cap is loose. If the oil comes out of the bleed hole, then allow the pressure to lower before the filler cap is removed. Some machines may have a vacuum breaker and pressure relief valve (1) that is used to relieve pressure instead of using the cap. Press the valve downward in order to relieve the pressure. Make the following inspections:
Check tank oil level.
Check all implement and steering oil line connections for damage and leaks.
Follow all implement and steering oil lines from the implement connections to valve connections. Check the lines and connections for damage and leaks.
Check the control valves for leaks.
Check the pumps and connections for damage and leaks.
Follow the pump lines to the tank and valves. Check the lines and the tank for damage and leaks.
Look for air in the oil that is in the tank. Check the oil immediately after the machine has stopped. Use a clear bottle or a clear container in order to get a sample of the oil. A milky appearance indicates air or water in the oil. Look for air bubbles in the oil that is in the bottle.
Remove the filter elements and look for particles that were removed from the oil by the filter element. A magnet separates ferrous particles from nonferrous particles.
Inspect the control linkage for damaged components.