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When in the maintenance, repair of the hydraulic system, first release the pressure of the
oil. First go out the engine and then keep the starting key in the state of “on”, trip the two
operating hand shank. Loose pressure vent valves (3-5 turns as serial 1 in the picture. So
loosen the pressure in the hydraulic tank.
Hydraulic oil radiator
To get the wished cooling performance, should keep the hydraulic oil radiator clear.
Clear the pipe by compress air or steam. if the environment is bad ,should increase the
clearing times.
Scavenge oil filter element
As seen in the picture, the scavenge oil
filter element should work in the scope
between 50 hours and 500 hours, and been
changed one time.
Lubricating oil suction pump
As seen in the picture, the lubricating oil
suction pump should work in the scope
between 50 hours and 500 hours. And then
change the filter element after 500 hours and
repairing the hydraulic.
Note: if the excavator work in the bad environment, the changing of the filter element
should accord to “lubrication: the changing of hydraulic oil.”
The maintenance of the hydraulic system
The maintenance should include check the hydraulic system whether leakage, loosing,
pipe destroying, and clear the hydraulic radiator probably.
Danger: forbidding checking the leakage performance without wearing safety gloves.
Perform the maintenance of the hydraulic pipe system until the working equipment reduce the
floor and going out the engine and loosing of the compress.
Warning: once the high-pressure hose have something wrong (for example bursting,
damping, surface damage and so on), should replace immediately. When replacing the
high0pressure hose, no pressing, no drawing hose. no twisting and overbending the hose.
Exhausting from the hydraulic pump
When finishing the maintenance or finishing
changing oil every time, should exhaust the hydraulic pump. Loose the drainage pipe 1 and
make the air exhaust. Once hydraulic oil pour from pipe, should set the exhausting pipe in
time.
When the first time starting or after maintenance, aslo pure hydraulic oil by this tip.
Hydraulic cylinder
Note: please contact with the Shandong kadekor power machine co., ltd before changing
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