MINOR CHANGE MACHINE FAMILIARIZATION
2
Dynamic Acera 03/05 Rev. 05
Page 3-72
YQ101ReleasePress
B
32
DRAINING
HYD. PRESS
PR
Engine running with throttle
potentiometer in low idle
Press and hold Screen Change and Buzzer Stop
switches simultaneously for 5~10 seconds and release
YQ102DrainHydSystem
14. Draining Hydraulic System Pressure – FIGURE
2.15A
A new convenient feature is now incorporated in the
mechatronics system of the Dynamic Acera minor
change excavators to help the operator release the
system pressure in the hydraulic system directly from
the operator’s cab for machine service or to switch
auxiliary attachments. Proceed as follows to release
hydraulic system pressure:
a.
With engine running and attachment placed on the
ground and the throttle potentiometer at low idle,
press and hold the screen change switch (
)
and the buzzer stop switch (
) simultaneously
for at least 5 seconds. (See Figure 2.15A) . The
engine speed will switch to low idle and the moni-
tor display will show “
32
DRAINING
HYD. PRESS
PR
”, and the moni-
tor alarm will sound intermittently.(
Alarm is nor-
mal condition
)
FIGURE 2.15A
FIGURE 2.15C
W A R N I N G
MAKE SURE TO STABILIZE THE ATTACHMENT ON THE
GROUND BEFORE ACTIVATING THE HYDRAULIC PRES-
SURE DRAIN SYSTEM
NOTE:
The monitor alarm can
be turned off with the buzzer
stop switch.
and the monitor alarm sounds continuously, turn the
ignition switch to the OFF position to shut down the
engine. The alarm will quit sounding and the monitor
display will disappear 4 seconds after the key switch is
turned OFF. Repeat the process again starting from
step
a
.
Do not attempt to service the machine or switch auxil-
iary attachments without releasing the hydraulic sys-
tem pressure.
33
FAIL DRAIN
HYD. PRESS
PR
W A R N I N G
While releasing the hydraulic system pressure, if the
monitor displays:
SWING LEFT
SWING RIGHT
ARM OUT
ARM IN
BUCKET IN
BUCKET OUT
BOOM RAISE
BOOM LOWER
c.
Turn the ignition switch to the OFF position to shut-
down the engine. The alarm will quit sounding and
the monitor display will disappear 4 seconds af-
ter the key switch is turned OFF. (Figure 2.15B)
YQ102KeyOff
FIGURE 2.15B
b.
Operate all control levers, corresponding to the
circuits required including Travel and Auxiliaries,
several times to release the system pressure.
d.
Press the hydraulic tank pressure relief valve and
proceed to service or change auxiliary attach
ments.
e.
As long as screen #33 “Fail Drain Hyd. Press
does not show on the cluster gauge procedure
is complete. If icon appears repeat procedure.