Case CX490D, Operator'S Manual

Page: 336 / 370

9 - ACCESSORIES
9. Press the front side of the quick coupler switch (1) to
set the locking status of the quick coupling system.
The audible alarm device stops sounding.
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10. Maintain the hydraulic pressure in the bucket cylinder
for approximately 5 – 10 s to allow the latching hook
to close.
11. Confirm that the attachment pin is correctly engaged
in the latching hook.
NOTE: the latching hook has a different color to ease the
visual confirmation of the engagement of the pin.
NOTICE: If visual confirmation is not possible from the
operator's seat, get down from the machine and make
sure that the attachment pin is correctly engaged in the
latching hook.
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12. Operate the bucket control to retract the cylinder rod
and allow the safety device to engage.
13. To ensure that the bucket/attachment pins are se-
curely held by the quick coupler, apply force to the
bucket/attachment by pressing it against the ground.
NOTE: This operation is commonly known as “Bump
Test” or “Ground test”.
NOTICE: If the quick coupler is used in conjunction
with an hydraulic breaker, do not apply force with the
chisel.
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