HOSE AS 1457316 - Caterpillar

Loosen locknut (6) on load sensing signal limiter valve (2).
Turn the adjustment screw (5) of load sensing signal limiter valve (2) clockwise by one half turn.
Tighten locknut (6) on load sensing signal limiter valve (2).
Remove the cap from main relief valve (1).
Loosen the locknut on main relief valve (1).
Turn the adjustment screw clockwise on main relief valve (1) by one quarter turn.
Tighten the locknut on main relief valve (1).
Install the cap onto main relief valve (1).Test Procedure
Start the engine.
Set the engine speed dial at "1".
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Power mode control button located on the soft panel switch
Push down on the power mode control button in order to activate power mode.Note: The indicator light will be illuminated when power mode is activated.
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Automatic Engine Speed Control (AESC) as displayed on the programmable function key in the monitor.
Disable the automatic engine speed control through the monitor by pressing the programmable button.
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Hydraulic modulation switch on left joystick
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Hydraulic modulation medium mode (monitor display)
Select the hydraulic modulation mode as medium. Press the lower front switch on the left joystick to select the hydraulic modulation mode.
The air conditioning should be turned off for the following test.
Start Cat ET.
Select the "Machine ECM" and then select “OK”.
Select “Service” from the main menu.
Select “Service Procedures”.
Creating main pump pressure higher than 38,000 kPa (5,512 psi) for more than five seconds may damage the machine.
Select "Line and Main Relief Adjustments".Note: This selection provides a permanent flow of about 40 L/min (11 US gpm) from the main pump without any margin pressure control. The multi combined valve (MCV) load sensing cutoff valve pressure is set to maximum and the MCV line relief pressure is set to 25,000 kPa (3,626 psi). Cat ET also allows the main pump pressure limit to be raised in order to provide high pressure of about 43,000 kPa (6,237 psi).
Lower the left console.
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Joystick (thumb slider)
For pressure on port "A", move the thumb slider on the left joystick to the left position and read the pressure on the pressure gauge that is connected to the load sensing signal pressure tap. Refer to Table 1 in this manual for the correct pressure.
For pressure on port "B", move the thumb slider on the left joystick to the right position and read the pressure on the pressure gauge that is connected to the load sensing signal pressure tap. Refer to Table 1 in this manual for the correct pressure.
If the line relief valve pressure is not set to the proper specification, refer to the "Adjustment Procedure".Adjustment Procedure
Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
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Second high pressure auxiliary valve
(7) Line relief valve (port B)
(8) Line relief valve (port A)
Remove the cap from the line relief valve that is being adjusted.
Loosen locknut on the line relief valve.
To avoid damage to the hydraulic