CARTRIDGE GP-TURBOCHARGER 3016869 - Caterpillar

Test Procedure For EH System
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(1) Location of the remote pressure taps (hydraulic service center). Right side of machine.
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Hydraulic service center. Fan brake pilot manifold
(2) Pressure tap for the steering pump
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Steering load sense pressure tap is located next to the steering control valve.
(3) Steering load sense pressure tap
Install a 0 to 60000 kPa (0 to 8700 psi) pressure gauge (D5) to the high-pressure port (D4) of pressure differential gauge group (D7).
Attach one end of hydraulic line (D1) to pressure tap (2). Pressure tap (2) is located in the hydraulic service center that is on the right side of the machine. Attach the other end of hydraulic line to the open end of the tee (D6) of pressure differential gauge group (D7).
Attach another hydraulic line (D1) to the steering load sense pressure tap (3). Attach the opposite end of hydraulic line (D1) to the low-pressure port (D8) of the pressure differential gauge group (D7).Note: Position pressure differential gauge group (D7) and hydraulic lines (D1) in order to prevent damage from any machine movement. Position the test equipment in order to allow a second technician to observe and record the pressure readings safely.
Start the engine. Operate the engine at high idle. Continuously stall the RACK BACK function while simultaneously raising the lift arms at full speed. When the lift arms are almost raised, cycle the tilt cylinder almost to the FULL DUMP position. Then move the tilt cylinders to the full RACK BACK position. Continuously stall the RACK BACK function and simultaneously lower the lift arms back to the ground level position. Without stalling the RACK BACK function, cycle the lift function to raise the lift arms fully. Then lower the lift arms in order to allow the pump to operate at low-pressure briefly and circulate oil through the system. Repeat this process in order to increase the temperature of the oil to normal operating temperature.
Raise the bucket until the bucket is slightly off the ground. Run the engine at high idle.
Command steering in one direction. Make sure that you turn the steering wheel at a uniform rate. A second technician should look at pressure gauge (D7).
Record the pressure reading on pressure gauge (D7). The reading that is on pressure gauge (D7) is the margin pressure. Margin pressure is the difference between steering pump pressure and the load sense pressure (3). The margin pressure should be 2400 100 kPa (348 15 psi) .Note: The pressure reading on pressure gauge (D5) is the steering pump pressure.
Adjust the flow compensator valve if the margin pressure is not correct.
Run the machine at low idle. Lower the bucket and any attachment to the ground. Stop the engine.
Relieve the hydraulic pressure. See the reference at the start of this procedure for the correct method.
Remove the hydraulic lines and the pressure gauge from the pressure tap.Note: If you adjust the flow compensator spool in the steering pump pressure and flow compensator valve, perform this test procedure again.Adjustment Procedure (Margin Pressure)
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Pressure and