SUSPENSION GP-SEAT 8Y6275 - Caterpillar

Test Preparation
Move the machine to a smooth horizontal location. Move away from working machines and personnel. Lower the work tool to the ground.
Allow only one operator on the machine. Keep all personnel away from the machine or in the view of the operator.
Engage the parking brake.
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Place the steering frame lock in the LOCKED position.Reference: For more information about preparing the machine for troubleshooting, refer to the Service Manual module Testing and Adjusting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.Test Procedure
Start the engine and run the engine at high idle. Operate the control levers and move all the cylinders in order to increase the temperature of the hydraulic oil to normal operating temperature of approximately 54 to 70°C (129 to 158°F).
Lower the lift arms to the ground.
Turn the engine start switch to the OFF position.
Release the hydraulic system pressure. Refer to Testing and Adjusting, "System Pressure - Release".
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Articulation hitch (Right side view)
Location of the pressure tap for the implement pump load sense relief valve
Connect 1U-5481 Pressure Gauge Group or 198-4240 Digital Pressure Indicator on the pressure tap. The pressure tap is located on the right side of the machine on the non-engine end frame near the articulated hitch.
Start the engine. Raise the work tool to the maximum height. Hold the lift control lever in the full RAISE position.Note: Do not keep the lever in the RAISE position more than 5 seconds while the pressure is at the load sensing signal relief setting.
Increase the engine speed to high idle. Observe the pressure gauge with the lift control lever in the RAISE position. The pressure setting for the relief valve should be 28900 700 kPa (4191.65 101.52 psi).Note: If the pressure setting is correct, proceed to Step 8. If the pressure setting of the relief valve is not correct, proceed with the following steps.
Position the work tool on the ground.
Turn the engine start switch to the OFF position.
Release the hydraulic system pressure. Refer to Testing and Adjusting, "System Pressure - Release".
Remove the test equipment.
Place the steering frame lock in the STORE position.Adjustment Procedure
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Lift Arm Supports
Position the lift arms on the stands. Turn the engine start switch to the OFF position.
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Front guard group
Remove the front guard group in order to access the relief valve.
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Location of the 375-3788 Relief Valve Gp (Load Sensing Signal)
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(1) Adjustment screw
(2) LocknutNote: Always turn adjustment screw (1) clockwise in order to adjust the pressure. Clockwise rotation will compensate for any internal friction inside the valve that would oppose the setting of the bias spring. For example, if the adjustment screw needs to be turned counterclockwise by 1/2 turn, turn the adjustment screw counterclockwise by one full turn. Then, turn the adjustment screw clockwise by 1/2 turn.
Loosen locknut (2). Turn adjustment screw (1) clockwise in order to increase the pressure setting. Turn adjustment screw (1) counterclockwise in order to decrease the pressure setting of the relief valve.
After adjustment screw (1) is turned for an