Hydraulic System Tests

Main Pressure Adjustment WARNING

BEFORE beginning this service procedure, shut down the machine according to “Mandatory Safety Shutdown Procedure” on page8.

1.Complete the mandatory safety shutdown Procedure. See “Mandatory Safety Shutdown Procedure” on page8.

2.Raise the ROPS/FOPS according to “Raising ROPS/FOPS” on page239.

3.Locate the relief valve adjuster (T, Fig. 527) on the main control valve, behind hose (Z).

5.Move the auxiliary control rocker switch on the right joystick to the full forward or reverse position to pressurize the circuit.

NOTE: Press the high-flow auxiliary hydraulics buttons on the right console when checking the high-flow circuit pressure.

6.Have the assistant observe the pressure reading on the gauge. The pressure reading should be 205-215 bar (2975-3125 psi) with the engine at high idle.

NOTE: High-flow pressure reading should be 195205 bar (2825-2975 psi).

7.If the pressure reading is NOT within the specified pressures, adjust the pressure according to “Main Pressure Adjustment” on page289.

NOTE: The main control valve is located under the ROPS/FOPS on the front of the firewall on the right side.