CASE CONSTRUCTION CX75C SR, Руководство оператора

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6 - MAINTENANCE
3. Prepare a container of the necessary capacity
and use a pump to drain the hydraulic fluid from
the hydraulic tank.
4. Place a container with suitable capacity under-
neath the tank drain plug, then remove the tank
drain plug to drain the remaining hydraulic fluid.
SMIL13CEX2761AB
2
5. Replace the suction filter as described on page
6-60 .
6. Replace the return filter as described on page
6-61 .
7. Install the reservoir drain plug.
8. Pour new hydraulic fluid into the reservoir.
9. Replace the cover plate seal if necessary and
install the cover plate on the tank.
NOTICE: before starting the engine, it is extremely impor-
tant to bleed air from all the hydraulic components.
Bleeding air from the hydraulic components
Swing reduction gear
•
Start the engine and run it at low idle speed.
Loosen the air bleed plug and check that fluid
flows out. If necessary, stop the engine and
add oil from the orifice. Install the plug but
leave it untightened and start the engine. Run
the engine at low idle until the oil starts flowing
out of the orifice. Completely tighten the air
bleed plug. Swing the upper structure all the
way to the right and all the way to the left at
least two times. After bleeding is complete,
stop the engine for about
5 min , then check
that there are no air bubbles in the hydraulic
reservoir.
SMIL13CEX2823AB
3
Attachment cylinders
•
Start the engine and run it at low idle speed.
Extend and retract the attachment cylinder rods
four or five times without bringing them to end
of stroke. Then repeat the operation three or
four times, this time bringing the cylinder rods
to end of stroke.
NOTICE: after bleeding air from the components, stop the
engine for about 5 min and check there are no bubbles at
the surface of the hydraulic fluid in the reservoir.
6-66