WASHER 5094457 - 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    
177-7860     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.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.Warming the Hydraulic Oil
Start the engine. Run the engine at Low Idle.
Place the boom lock in place so that the boom is locked. Stall the boom down for 3 minutes.
Remove the pin for the swing. Operate the swing cylinders for three full strokes. Install the pin for the swing.
Stall the stabilizers in the raised position for one second three times.
Operate the lift cylinders for three full strokes.
Operate the front steering cylinders for three full strokes.
Stall the tilt function for one second in each direction. Repeat the stall three times.
Stall the boom function for one second in each direction. Repeat the stall three times.
Stall the stick function for one second in each direction. Repeat the stall three times.
Stall the bucket function for one second in each direction. Repeat the stall three times.
Stall the extendable stick function (if equipped) for one second in each direction. Repeat the stall three times.
Check the level of the hydraulic oil. Fill the hydraulic oil.
Check for hydraulic oil leaks. Repair any leaks.Hydraulic Oil Contamination Test
Illustration 1 g01224761
(1) Hydraulic pump (2) Torque output valve (3) Flow compensator valve (4) Signal pressure tapSignal pressure tap (4) is located on hydraulic pump (1). Torque output valve (2) and flow compensator valve (3) are also located on hydraulic pump (1). Access is gained from the bottom of the machine or access is gained by removing the floorplate.
Illustration 2 g01294853
(5) System pressure tapThe system pressure tap (5) is located on the block for the pump discharge pressure. Access is gained from the bottom of the machine.
Warm the hydraulic oil to a temperature of 60 °C (140 °F). Refer to "Warming the Hydraulic Oil".
Start the engine and run the engine at HIGH idle. Then, actuate all of the cylinders through at least five full strokes. Do not use FLOAT position of the lift control valve for this procedure.
Lower the work tool on the front of the machine and the stabilizers to the ground. Stop the engine.
Perform the proper Testing and Adjusting,