Hydraulics — Work System Pressure Tests Work System Pressure Tests
STEP 4
Work Pressure Test
Later Machines
This test determines the condition of the work/pump. STEP 1 Tilt the platform according to “Tilting the Platform” on page 61. STEP 2
A
Early Machines
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 test fitting (A) inside the front of the steering console pedestal.
Operate the auxiliary hydraulic flow without connecting an attachment. This will cause the work system circuit to reach full pressure.
NOTE: Early machines require removal of the front panel on the control column base to access test fitting (A).
STEP 5
STEP 3
Work Cylinder Leakage Test
Start the machine and allow it to warm to operating temperature (120° F / 49° C). Set the throttle to low idlle (1000 rpm).
This test determines the condition of the cylinder piston and seals.
Pressure should be 207 ± 7 bar (3000 ± 100 psi).
STEP 1 Start the machine and allow it to warm to operating temperature. STEP 2 Use the joystick to fully retract the cylinder to be tested.
50940008/AP0311
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PRINTED IN U.S.A.
