Manitowoc MLC650, Руководство по техническому обслуживанию

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Reference
Only
HYDRAULIC SYSTEM MLC650 SERVICE/MAINTENANCE MANUAL
2-34
Published 09-09-16, Control # 229-09
High Pressure Test
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.
This test generates maximum pressure in the main hydraulic
circuits. Only perform this high pressure test when absolutely
necessary and by a qualified service technician.
Defective brakes may allow unintended motion during the
test. Move the crane to an area where such motion is not a
hazard. Be prepared to stop the engine if unintended motion
occurs.
Use a signal person to monitor functions the operator cannot
see.
Perform the following procedure for the high pressure test.
1. Apply all park brakes using the switches on the control
console.
2. Start and run the engine at high idle.
3. At the Main display, navigate to the High Pressure Test
screen
and start the High Pressure Test ( Figure 2-32 ).
See the MLC650 Main Display Operation F2267 for
detailed instructions on how to navigate to the screen
and run the test.
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 in red. Troubleshoot the
failed circuit to determine the cause of any failures.
Charge Pressure Test
The charge pressure test checks the ability of all primary
crane functions to build proper charge 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.
Perform the following procedure for the charge pressure test.
1. Apply all park brakes using the switches on the control
console.
2. Start and run the engine at low idle.
3. At the Main display, navigate to the High Pressure Test
screen
and start the Charge Pressure Test
( Figure 2-33 ). See the MLC650 Main Display Operation
F2267 for detailed instructions on how to navigate to the
screen and run the test.
Charge pressure levels must be within a specified range
during this test. Any pump that failed to maintain charge
pressure within a specified range is highlighted in red.
Troubleshoot the failed circuit to determine the cause of the
failures.
WARNING
Skin Contact Hazard!
High-pressure hydraulic oil can puncture skin, causing
serious injury.
If injured, seek medical help immediately. Surgery is
required to remove the hydraulic oil.
FIGURE 2-32
FIGURE 2-33