SPRING 1631135 - Caterpillar

Loosen locknut (6) on load sensing signal limiter valve (8) .
Turn the adjustment screw (5) of load sensing signal limiter valve (8) clockwise by one half turn in order to increase the pressure over 44000 kPa (6400 psi).
Tighten locknut (6) on load sensing signal limiter valve (8) .
Loosen locknut (2) on main relief valve (7) .
Turn adjustment screw (1) clockwise on main relief valve (7) by one quarter turn.
Tighten locknut (2) on main relief valve (7) .Test Procedure
To prevent injury or death, never work under a machine while a test is being performed.
Start the engine.
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Engine speed dial
Set the engine speed dial at "5".
Lower the left console.
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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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Transmission control button located on the soft panel switch
Push down on the transmission control button in order to select SECOND GEAR. Note: The first indicator light will illuminate when the transmission is in SECOND GEAR.
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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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Joystick (front switch)
Disable the hydraulic modulation control, if equipped. Press the front switch on the right joystick in order to deactivate hydraulic modulation.
The air conditioning should be turned off for the following test.
Engage the service brake pedal.
Slowly depress the travel pedal in the forward direction.
Check the pressure at the load sensing signal pressure tap.Note: Refer to Table 2 in this manual for the correct pressure.
Slowly depress the travel pedal in the reverse direction.
Check the pressure at the load sensing signal pressure tap.Note: Refer to Table 2 in this manual for the correct pressure.
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Travel Motor (9) Line relief valve (Forward travel) (10) Line relief valve (Reverse travel) (11) Adjustment screw (12) Locknut
If line relief valves (9) or (10) of the travel motor are not set to the proper specification, perform the entire "Adjustment Procedure" in order to adjust the appropriate line relief valve at the travel motor.Adjustment Procedure
Stop the engine.
Loosen locknut (12) of the line relief valve (9) or (10) that is being adjusted.
Turn adjustment screw (11) clockwise until the pressure at the load sensing signal pressure tap is set to the proper specification.Note: Always make the final pressure adjustments on the pressure rise.
Tighten locknut (12) for the line relief valve to the specified torque.
Verify that the line relief valve pressures are within specifications.Note: Refer to Table 2 in this manual for the correct pressure.
Return main relief valve (7) to the original setting.Note: Refer to Testing and Adjusting, "Relief Valve (Main) - Test and Adjust".
Return load sensing signal limiter valve (8) to the original setting.Note: Refer to Testing and Adjusting, "Relief Valve (Signal Limiter) - Test and Adjust".Worksheet
Table 2
"Relief Valve (Travel Motor) - Test and Adjust"    
Date:     Machine Serial Number:    
Machine Settings     Engine Speed    
Speed dial "5"
AESC