HARNESS AS-ENGINE 3616381 - 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 brake system.
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.
Table 1
REQUIRED TOOLS    
Part Number     Description     Quantity    
6V-4055     Hose Assembly     1    
6V-4143     Coupler     1    Instrument testing on the hydraulic system components and steering system components is the final step, when you are diagnosing a problem. Test results should verify the status of a component. Adjusting procedures are provided, when the procedures are required.
Illustration 1 g00548549
Location of the signal pressure tap (1) Hydraulic pump. (2) Signal pressure tap. (3) Flow compensator valve. (4) Pressure compensator valve.Signal pressure tap (2) is located at hydraulic pump (1). Flow compensator valves (3) and pressure compensator valve (4) are also located at hydraulic pump (1). Access is gained from the bottom of the machine or access is gained by removing the floorplate.
Illustration 2 g00548550
Location of the system pressure tap (5) System pressure tap. (6) Loader control valves.System pressure tap (5) is located near loader control valve (6). The loader control valves (6) are located on the right side of the machine. Access is gained from the bottom of the machine.The hydraulic oil in the system is SAE 10W. If the oil becomes dirty, component failure could result. Dirty oil can also contribute to overheating.
Start the engine and run the engine at high idle. Increase the hydraulic oil temperature to the operating temperature by stalling the boom DOWN for 60 seconds. Then, actuate all of the cylinders through at least ten full strokes. Do not use loader float for this procedure.
Lower the implements and the stabilizers to the ground. Stop the engine.
Move all the control levers through all of the positions in order to release pressure in the hydraulic system.
Install one 6V-4143 Coupler Assembly to one end of 6V-4055 Pressure Hose Assembly. Place the free end of the hose assembly into the hydraulic tank through the filler tube. Attach the end of the hose assembly with the coupler to system pressure tap (5). Make sure that all the controls for the hydraulics are in the HOLD position.
Start the engine and run the engine at low idle for 5 minutes.Note: Do not operate the hydraulic controls nor the steering controls.
Use an appropriate container and draw a 100 mL oil sample from the hose assembly. Use a new sampling bottle. Stop the engine. The contamination level must meet ISO 18/15 or the contamination level must be equal to Table 2 or less than Table 2.
Table 2
Particle Size (Micron)     Maximum Number of Particles    
>5     250000    
>15     25000