WIRING GP-STEERING 3978809 - Caterpillar

Introduction
When the swing pump has been serviced or the hydraulic oil has been replaced, air will need to be removed. Use the following procedure to remove air from the hydraulic system:Machine Preparation
Clear all personnel from the machine and from the area around the machine.
To avoid system damage, make sure that the hydraulic pump is properly filled with hydraulic oil before start-up.
Start the engine.
Place the hydraulic activation control lever in the UNLOCKED position.
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Engine speed control "Max Speed" as displayed on the programmable function key on the monitor.
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.
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.Adjustment Procedure
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Top right view of swing pump (1) Vent plug
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 work tools have been lowered to the ground, 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 product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
While the engine is stopped, remove vent plug (1) from the swing pump.
Fill the swing pump with oil.
Install vent plug (1) and tighten to the specified torque.
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".
Slowly loosen vent plug (1) until oil begins to flow around vent plug.
Tighten vent plug (1) to the specified torque.