HOSE AS 3843867 - Caterpillar

Eject Pressure
Install a 34000 kPa (5000 psi) pressure gauge to the test fitting for the case drain pressure.ReferenceRefer to Testing and Adjusting, "General Information" for the location of the test fitting for the machine that is being tested.
Start the engine and move the ejector control fully forward past the EJECT position. There is no detent in this position.
When the ejector blade has reached full travel, run the engine at maximum speed. Hold the ejector control fully forward and record the pressure that is displayed on the pressure gauge. This pressure is the eject pressure.The eject pressure should be 17240 345 kPa (2500 50 psi). If the eject pressure is correct, proceed to Step 4.If the pressure is incorrect, the pressure must be adjusted. Proceed to Step 3.a.
Shut off the engine.
Illustration 1 g02473996
The ejector control valve is located in front of the material handling body.
Illustration 2 g02473976
The adjustment screw is part of relief valve (1) . The relief valve is installed in the ejector control valve.
Rotate the adjustment screw clockwise in order to increase the eject pressure.Rotate the adjustment screw counterclockwise in order to decrease the eject pressure.
Lower the cab. Refer to Operation and Maintenance Manual, "Cab - Tilt".
Repeat the procedure from Step 2.
Retract the ejector blade and shut off the engine.
Remove the pressure gauge from the machine.Retract Pressure
Illustration 3 g02475925
Test fitting for the retract pressure
Install a pressure gauge capable of measuring 34000 kPa (5000 psi) on the test fitting.
Start the engine and run the engine at low idle.
Ensure that the ejector blade is fully retracted.
Move the ejector control to the EJECT position and then move the ejector control to the RETRACT position. Increase the engine speed and hold the ejector control in the RETRACT position. Record the pressure that is displayed on the pressure gauge. This pressure is the retract pressure.The retract pressure should be 20685 345 kPa (3000 50 psi). If the retract pressure is incorrect,
There may be a problem with one of the components of the ejector system
There may be a problem with one of the components of the braking systemRefer to Systems Operation, Testing and Adjusting, "Ejector System Troubleshooting".
Shut off the engine and remove the pressure gauge from the machine.Crossover Pressure
Illustration 4 g03350957
(2) Sequence valveThe crossover pressure is determined by sequence valve (2) in the ejector manifold. Sequence valve (2) ensures that the braking system is adequately charged before the ejector cylinder can be retracted the braking system piston pump.Use the following procedure in order to test the crossover pressure.
Relieve the pressure from the braking system. Refer to Systems Operation, Testing and Adjusting, "General Information".
Install a 34000 kPa (5000 psi) pressure gauge to the test fitting for the brake system pressure. the pressure gauge must be visible from the inside of the cab.Reference Refer to Testing and Adjusting, "General Information" for the location of the test fitting for the machine that is being tested.
Illustration 5 g02475929
Test fitting for the retract pressure
Install a 34000 kPa (5000 psi) pressure gauge on the test fitting for the retract pressure.