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ATTACHMENTS AND OPTIONS
HYDRAULIC CIRCUIT
HYDRAULIC CIRCUIT CONNECTION
When connecting the attachment, connect the hydraulic circuit
as follows.
1.
Check that the stop valve is at the LOCK position, then
remove the plug.
Be careful not to lose or damage any part that is
removed.
2.
Connect the elbow and nipple provided by the attach-
ment maker, then connect the attachment piping.
NOTICE
When connecting the piping, operate the bucket fully to
the dump position and be careful not to interfere with link
(a).
Air Bleeding
1.
Starting engine
Start the engine according to "STARTING ENGINE (PAGE 3-31)" keep running the engine at low idling for 10
minutes, and carry out the following procedure.
2.
Bleeding air from cylinders
1)
Run the engine low idling, and extend and retract each cylinder 4 to 5 times without operating it to the
end of its storoke. (Stop approx. 100 mm (4 in) before the end of the stroke.)
2)
Next, operate each cylinder to the end of its stroke 3 to 4 times.
NOTICE
If, at first, the engine is run at high speed or the cylinder is operated to the end of its stroke, the air inside
the cylinder may cause damage to the piston packing or other parts.
3.
Bleeding air from attachment (if equipped)
For machine equipped with attachment such as the breaker, actuate the attachment pedal about 10 times to
bleed the air completely from the attachment circuit while running the engine at low idling.
NOTICE
If the attachment bleeding procedure is specified by the manufacture, bleed the attachment according to
such procedure.
4.
Operation
1)
After completion of bleeding the air, stop the engine, and wait for at least 5 minutes before starting oper-
ations. In this way, the air bubbles are removed from the oil inside the hydraulic tank.
2)
Check for any leakage of oil, and wipe off any oil that has been spilled.
MACHINES READY FOR ATTACHMENTS
6-9
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