SEAL 5454902 - Caterpillar

Press button "A" on the monitor to set the engine speed at "Max Speed".
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Parking brake control button located on the soft panel switch
Push down on the parking brake control button in order to de-activate the parking brake.Note: The green indicator light will be illuminated when the parking brake is de-activated.
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Swing brake control button located on the soft panel switch
Push down on the swing brake control button in order to de-activate the swing brake.Note: The green indicator light will be illuminated when the swing brake is de-activated.
Increase the hydraulic oil temperature to 46 to 80° C (115 to 176° F).
Position the machine on level ground. Check the visibility and adjust the mirrors for the best vision close to the machine.
Position the machine on level ground. Check the visibility and adjust the mirrors for the best vision close to the machine.
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Stabilizer lower control button located on the soft panel switch
Push down on the stabilizer control button in order to lower the stabilizer to the ground.
Lower the work tool to the ground.
Place the hydraulic activation control lever in the LOCKED position.
Stop the engine.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.Dispose of all fluids according to local regulations and mandates.
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Pressure taps located behind the right side access door. (1) Left main pump (2) Right main pump (3) Load sensing signal
Connect tooling (A2) 0 to 41,368 kPa (0 to 6,000 psi) pressure sensor to the following pressure taps: left main pump, right main pump and load sensing signalTest Procedure
Start the engine.
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Engine speed control "Idle" as displayed on the programmable function key on the monitor.
Press button "B" on the monitor to set the engine speed at "Idle".
Check the margin pressure for the left pump and the right pump.Note: Margin pressure is the difference between main pump pressure and load sensing signal pressure.Note: Refer to Table 1 for the correct pressure.
If margin pressure is not within the specification, perform the following "Adjustment Procedure" procedure to adjust the load sensing spool.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