Case CX490D Operator's Manual page 336

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.
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.
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.
9 - ACCESSORIES
9-30
7
SMIL15CEXY501AA
8
SMIL13CEX2702AB
9
SMIL13CEX2703AB