VALVE GP-PRIORITY 1831410 - Caterpillar

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.
Table 1
Required Tools    
Part Number    Part Description    Qty    
6V-2076     Hose Assembly     1    
6V-4143     Coupler     2    
6V-4142     Nonvalved Nipple     1    
8T-0857     Pressure Gauge
10000 kPa (1450 psi)     1    Note: The low pressure standby test should be used as a reference only. Before making any adjustments to the pump controller, perform the Testing and Adjusting, "Piston Pump (Steering, Implement, Pilot) Margin Pressure - Test and Adjust".
Lower the work tool to the ground.
Stop the engine.
Engage the parking brake.
To release any steering system pressure, turn the steering wheel to the left and to the right.
Illustration 1 g01403498
Side panel
Remove the side panel from the right side of the machine.
Illustration 2 g01214909
(A) Pressure tap for steering pressure and pump outlet pressure
The pressure tap for the steering pressure is on the bank valve. The bank valve is behind the side panel on the right side of the machine. Remove the cap from the pressure tap.
Attach one 6V-4143 Coupler to each end of the 6V-2076 Hose Assembly .
Attach one 6V-4142 Unvalved Nipple to one 8T-0857 Pressure Gauge .
Attach one 6V-4143 Coupler on the hose to the pressure tap for the steering pressure.
Attach the other 6V-4143 Coupler on the hose to the 6V-4142 Unvalved Nipple .
Start the engine.
Run the engine at LOW idle. Do not move the steering wheel.
The pressure should be 3800 175 kPa (550 25 psi). If the standby pressure is not correct, perform the Testing and Adjusting, "Piston Pump (Steering, Implement, Pilot) Margin Pressure - Test and Adjust" before making any adjustments to the pump controller. If the pressure is correct proceed to the next step.
Remove the hoses and the gauges.
Replace the side panels.