Hydraulics — Steering Circuit Pressure Test Steering Circuit Pressure Test
STEP 3 Disconnect the hose from the base of the cylinder.
This test checks for correct steering circuit pressure.
STEP 4 IMPORTANT: Hydraulic oil loss may occur. Provide a means to catch oil where the hose was disconnected from the base of the cylinder. With an assistant holding a container to catch oil at the point the hose was removed from the base of the cylinder, use the joystick to try to retract the cylinder farther. Only a small amount of oil, or no oil at all, should drain from the port at the base of the cylinder. Draining oil indicates worn seals and/or piston.
NOTE: Incorrect steering circuit pressure may indicate other hydraulic system problems. Refer to “Hydraulics Troubleshooting Diagnostic Flow Charts” on page 107. STEP 1 Tilt the platform according to “Tilting the Platform” on page 61. STEP 2
A
Insert a run tee (Mustang P/N 176526) in between the hydraulic hose and 90° fitting indicated in the figure at (A). NOTE: A test fitting (Mustang P/N 50300055) can additionally be inserted to allow connecting a Mustang pressure test kit (Mustang P/N 184476). IMPORTANT: Start with a pressure gauge rated for a higher pressure than required, and move to lowerpressure gauges as needed. Gauges will be damaged if the pressure exceeds the capacity of the gauge. Connect a pressure gauge rated for 414 bar (6000 psi) to the test fitting. STEP 3 Start the machine and allow it to warm to operating temperature. STEP 4 Turn the steering in one direction all the way to the stop to dead-head the cylinder. PRINTED IN U.S.A.
125
50940008/AP0311
