KCP Heavy Industries Co., Ltd. Maintenance
7-8
7.4.2 Electrical system
► Check that all electrical connections are secure and free from corrosion.
► Check that the electrical cables have no breaks.
► Check the insulation on the electrical cables.
7.4.3 Hydraulic system
► Check the oil cooler.
► Remove the dirt deposits from the oil cooler.
► Check all hydraulic hoses for leaks.
► Check hydraulic unions for leaks.
7.5 Changing the hydraulic fluid
Note ___________________________________________________________________
You must make it impossible for dirt or other impurities to enter the system.
Even small particles may cause valves to be scored, pumps to seize, choke and control
bores to become blocked.
Hydraulic fluid drums must stand for some time before the fluid is taken from them. Never
roll the barrels to where you will be drawing off the fluid. Clean caps and their
surroundings before opening them.
If possible, you should use a filter unit to transfer the hydraulic oil.
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Danger _________________________________________________________________
The air pressure in pressurized systems must be released.
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► Switch the drive engine off.
► Secure the system against unauthorized starting – if you have any keyed switches,
remove the keys.
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