TROUBLESHOOTING
PUMP MERGE-DIVIDER LOGIC
PUMP MERGE-DIVIDER LOGIC
Categon/
Flow divided Flow merged
Flow divided
Flow merged
Mode
Boom/swing priority selection mode OFF
Boom/swing priorin/ selection mode ON
Pump merge-divider solenoid ON
Pump merge-divider solenoid OFF
P”mp merge-divider
Pump merge-divider
solenoid ON
solenoid OFF
L/o
- All operations
x
With travel ON
l Independent operation of travel
* independent operation of swing
With travel ON
*Except independent operation of
*Independent
Compound operation
travel (compound operation with
operation of travel with travel
travel)
*Independent
*Except independent operation of
operation of boom,
swing (compound operation with
travel)
arm, bucket,
service, swing with
Operations A, B and C with travel
Operations except operations A, B
travel OFF, and
OFF and swing lock switch OFF
and C with travel OFF and swing lock compound Operation
switch OFF
of each of these
A
Arm IN
*Compound operation with
Swing + boom LOWER
travel
*Swing + bucket CURL
Swing + arm IN
*Swing + arm OUT
Swing + bucket DUMP
*Swing + boom RAISE
x
F/O
*Swing + service
*Independent operation of
u
boom
;
*Arm IN + bucket CURL
ai
-Independent operation of
when condition is *
d
arm
P
-Arm OUT + bucket DUMP
ii
t
*Independent operation of
5
B
and front or rear pump
.o
bucket
5
pressure more than 3.92
Ii *Arm IN + bucket CURL
5
MPa (40 kg/cm’)
2
with pressure less than
-Arm OUT + service and
14.7 MPa (156 kg/cm’)or
5
more than 24.5 MPa
front or rear pump
::
(250 kg/cm’) (except * )
pressure more than
“.I
*Arm OUT + bucket DUMP
19.6MPa (200 kg/cm’)
and pressure less than
3.92 MPa (40kg/cmz)
*Arm OUT + service and
pressure less than
*For HYPER GX :
19.6 MPa (2OOkg/cm’)
C
Boom priority 2 mode + boom
-AlI others
RAISE + arm OUT
With travel ON
G/O
l Independent operation of travel
H/O
* Independent operation of swing
D
*Operations B and C with travel
Except operation D
OFF and swing lock switch OFF
I
With swing lock OFF:
With swing lock OFF:
LS select
*Separated for swing + travel, boom RAISE, arm OUT (solenoid ON), not
*Separated for swing + travel (solenoid ON),
separated for other operations
not separated for other operations (solenoid
OFF)
x I ne pressure of tne tront or rear pumps is as tollows:
When pressure rises: 24.5 MPa (250 kg/cm%
(For details, see Fig. 1)
When pressure goes down: 14.7 MPa (150 kg/cm?
I
ON
OFF
B
------
f
I
I
14.7 (150) 24.5 (250)
Pressure tMPatkg/cm%
Fig. 1 205Po6228_ -21 1
0
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