HYDRAULIC SYSTEM 16000 SERVICE/MAINTENANCE MANUAL
2-24
Published 05-03-17, Control # 228-03
High Pressure Test
See Figure 2-21 for the following procedure.
The high pressure test checks the ability of all primary crane
functions to reach and hold high pressure. This test generally
is used only as a shop procedure on new cranes. It can also
be used as a quick way to test hydraulic components in the
primary hydraulic circuits.
CAUTION: Only perform this high pressure test when
absolutely necessary and by a qualified service technician.
Test high pressure using the following procedure:
1. Apply all park brakes with the switches on the control
console.
2. Start and run the engine at high idle.
3. Press the Enter button to go to the Pressure Test and
Calibration screen from the Menu screen.
4. Press the Enter button to go to level 2. Use
the Select buttons to show the HIGH
PRESSURE icon in the data box.
5. Press the Confirm button to start the test.
6. The test starts and the percent of completion is
displayed in the data box.
7. When the test is complete, the high pressure icon
reappears in the data box.
Maximum pressure levels must be reached within a specific
pump command range during this test. Any pump requiring a
command in excess of this range or failing to generate
maximum pressure is highlighted yellow. Troubleshoot the
failed circuit to determine the cause of the fault.
WARNING
High Pressure Hazard!
This test generates maximum pressure in the main
hydraulic circuits. Defective brakes may allow unintended
motion during test. Move the crane to an area where such
motion is not a hazard.
Use a signal person to monitor functions operator cannot
see.
Be prepared to stop the engine if unintended motion
occurs.
FIGURE 2-21
D16-28B
Data Box
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