case cx 210 electric
TRANSCRIPT
8020-7
Cre 7-28490GB Issued 12-00
CM00K026
Pb9
Pa9
Pc2
Pb8
Pb8’
Pa8’
Pa8
Pb7
Pa7
Pb6
Pa6
3�33PT
3�
P4
A3
B3
Pbu
A5
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5’
B5
PH
Pa1
Pb1
P3PA
A8
B8
A7
B7
A6
B6
Pb5
Pa5’
Pa5
Pc3’
Pc3
Pb4
Pb4’
Pb3
Pa3
A2
B2
Pb2
Pa2
A1
B1
T5T3 T4
3L� 3L�
A2
a2
A3
Dr B3B1
a3A1 Psv
a1
3.92 MPa568 psi 39.2 bar
a3
10µ
P3
P2
PP0
P1
0.103 Mpa14.5 psi 1 bar
0.02 MPa
8020-8
Cre 7-28490GB Issued 12-00
High Speed Travel CircuitThere are two flows of oil which supply the travel motors.
In high speed the travel motors are in low displacement position.
The travel motors have an internal circuit which enables them to change from low to high displacement whensupply pressure exceeds a certain level. If the pressure drops once more, the motors automatically revert to highspeed.
Oil from the A1 pump outlet enters the P1 port on the control valve, whereas oil from the A2 pump outlet entersP2. One flow goes directly to the left-hand travel spool and the other goes to the right-hand travel spool.
The calculator sends a current to the cylinder displacement change electrovalve for high speed to be selected.The 565 psi pilot pressure coming from the high speed electrovalve passes through the hydraulic swivel andgoes to pilot the travel motor cylinder displacement change spools.
C1. 2 stage travel (Red band)C3. Power boost (Yellow band)C5. Swing shut off (Green band)
Pa1/A1. RH forward travelPb1/B1. RH reverse travelPa6/A6. LH forward travelPb6/B6. LH reverse travel
1. Travel speed switch2. Controller3. Work mode switch
8020-9
Cre 7-28490GB Issued 12-00
CM00K013
Pb9
Pa9
Pc2
Pb8
Pb8’
Pa8’
Pa8
Pb7
Pa7
3E�
3D�
3�PPPT
3�
P4
A3
B3
Pbu
A5
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5’
B5
PH
3D�
3E�
P3PA
A8
B8
A7
B7
$�
%�
Pb5
Pa5’
Pa5
Pc3’
Pc3
Pb4
Pb4’
Pb3
Pa3
A2
B2
Pb2
Pa2
$�
%�
T5T3 T4
C4
C2
P
&�
&�
&�
TB
1 , 2
CA
E FB
D
P2
P1 P2
P1
Pm2
Pm1 3V
T2
Pm1
Pm23V
T1
$� $�
1
2
3
8020-10
Cre 7-28490GB Issued 12-00
Low Speed Travel CircuitLow speed is the normal speed for travel. Even if the machine is in high speed, if the starter switch key is turnedOFF and then turned ON again, the speed setting will always return to low speed.
Al pump flow enters port P1 of the control valve and A2 pump flow enters port P2. One flow goes directly to theleft-hand travel spool and the other goes to the right-hand travel spool. The high speed travel electrovalve isswitched OFF and the motor displacement change spools are in direct communication with the tank return line.
C1. 2 Stage travel (Red band)C3. Power boost (Yellow band)C5. Swing shut off (Green band)
Pa1/A1. RH forward travelPb1/B1. RH reverse travelPa6/B6. LH forward travelPb6/B6. LH reverse travel
1. Travel speed switch2. Controller3. Work mode switch
8020-11
Cre 7-28490GB Issued 12-00
CM00K014
Pb9
Pa9
Pc2
Pb8
Pb8’
Pa8’
Pa8
Pb7
Pa7
3E�
3D�
3�PPPT
3�
P4
A3
B3
Pbu
A5
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5’
B5
PH
3D�
3E�
P3PA
A8
B8
A7
B7
$�
%�
Pb5
Pa5’
Pa5
Pc3’
Pc3
Pb4
Pb4’
Pb3
Pa3
A2
B2
Pb2
Pa2
$�
%�
T5T3 T4
C4
C2
P
&�
&�
&�
TB
1 , 2
CA
E FB
D
P2
P1 P2
P1
Pm2
Pm1 3V
T2
Pm1
Pm23V
T1
$� $�
1
2
3
8020-12
Cre 7-28490GB Issued 12-00
Straight Line Travel CircuitThis chapter considers the situation whereby travel and boom raising operations are carried out at the sametime.
When the travel function is used, the low pressure circuit is closed and the pressure switch transmits thisinformation to the control unit, which in turn powers the pressure booster electrovalve.
When boom spool 2 is piloted, the control circuit coming from PP and going through all the attachment and swingcontrol valves is closed. The pressure in this circuit then rises to 565 psi and this pilots the straight line travelvalve. When this occurs, pump P1 supplies oil to both travel motors and pump P2 supplies oil to the attachment.As oil is supplied to both travel motors in parallel the pressure is equal and the machine travels in a straight line.If all the flow to the attachment is not used, the surplus is sent to the travel function, thereby keeping speed lossto a minimum.
If other functions than the boom are used at the same time as the travel function, the operating principle is thesame.
C1. 2 stage travel (Red band)C3. Power boost (Yellow band)C5. Swing shut off (Green band)
Pa1/A1. RH Forward travelPb1/B1. RH Reverse travelPa6/A6. LH Forward travelPb6/B6. LH Reverse travel
Pb4. Boom spool 2Pa8/A8. Boom upPb8/B8. Boom down
1. Travel speed switch2. Controller3. Work mode switch
8020-13
Cre 7-28490GB Issued 12-00
CM00K015
Pb9
Pa9
Pc2
3E�
Pb8’
Pa8’3D�
Pb7
Pa7
3E�
3D�
3�33PT
3�
P4
A3
B3
Pbu
A5
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5’
B5
PH
3D�
3E�
P3PA
$�
%�
A7
B7
$�
%�
Pb5
Pa5’
Pa5
Pc3’
Pc3
3E�Pb4’
Pb3
Pa3
A2
B2
Pb2
Pa2
$�
%�
T5T3 T4
C4
C2
P
&�
&�
&�
TB
1 , 2
C
A
E FB
D
P2
P1 P2
P1
Pm2
Pm1 Ps
T2
Pm1
Pm2Ps
T1
$� $�
1
2
3
8020-14
Cre 7-28490GB Issued 12-00
Swing CircuitThe swing function has one source of oil supply only.
When the engine is started and the swing control is in neutral, the swing brake electrovalve is powered and thebrake is applied.
When the swing function is operated, the swing pressure switch closes. Current to the swing brake electrovalveis cut off and the swing moto-reduction gear brake is released. The upperstructure thereby becomes free to turn.When the swing control is in neutral and the attachment is operated, lateral forces are exerted on theattachment. To prevent the swing effect damaging the brake the swing brake is released.
When one of the HP pressure detectors situated on the pump outlets informs the calculator that pressure isequal to or greater than 2132 psi, current to the swing brake electrovalve is cut off and the swing brake isreleased.
When swing pressure switch or attachment pressure falls below 2932 psi, current flows to the swing brakeelectrovalve after five seconds and the swing brake is applied.
If swing locking is solicited, even if the swing pressure is closed and pressure at both pumps is higher than2132 psi, the swing brake will be applied. The swing spool is piloted on both sides. If the starter switch key isturned to OFF position, the swing locking will be memorized and when the key is turned to ON position the swingfunction will still be locked.
During travel, if pressure in one of the pumps rises to 2132 psi, the swing brake will be released for 5 seconds.
Pa3/A3. LH SwingPb3/B3. RH Swing
C2. Swing brake (Pink band)
Key switchSwing pressure
switch
Outlet pressure on A1 or A2 pump
outlets
Swing brake electrovalve
Swing brake
OFF OFF 0 OFF Applied
ON OFF 0 ON Applied
ON ON > 0 OFF Released
ON OFF 2132 psi or more OFF Released
8020-15
Cre 7-28490GB Issued 12-00
CM00K016
P
Dr
BA
MU
GBGA
Pb9
Pa9
Pc2
Pb8
Pb8’
Pa8’
Pa8
Pb7
Pa7
Pb6
Pa6
��PPPT��
P4
��
��
Pbu
A5
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5’
B5
PH
Pa1
Pb1
P3PA
A8
B8
A7
B7
A6
B6
Pb5
Pa5’
Pa5
Pc3’
Pc3
Pb4
Pb4’
������
A2
B2
Pb2
Pa2
A1
B1
T5T3 T4
3SS1
2S 1S
S2
S3
C4
�
P
TB
�� ��
8020-16
Cre 7-28490GB Issued 12-00
Variable Priority Valve CircuitAfter going through the selector the swing pilot pressure arrives at Pc3 and pilots the variable priority valve. Thismakes it possible to have the maximum swing torque with high swing pressure, even if the dipper is being usedat the same time.
When the machine is digging, the boom raising pressure pilots the swing priority valve. Flow for the swingfunction is then in parallel with the dipper via the priority valve and dipper speed is improved. Digging speed ismore constant, even if the free passage is closed by the boom (2) spool.
When the swing function and the dipper retracting or boom raising functions are operated simultaneously,parallel working is reduced and swing pressure is maintained.
Pa5/A5. Dipper outPb5/B5. Dipper in
Pa9/Pb9. Dipper spool 2Pa3/A3. LH swingPb3/B3. RH swing
Pc3. Priority to swingPb4. Boom spool 2
8020-17
Cre 7-28490GB Issued 12-00
CM00K017
P
Dr
BA
MU
GBGA
����
Pc2
Pb8
Pb8’
Pa8’
Pa8
Pb7
Pa7
Pb6
Pa6
��PPPT
��
P4
��
��
Pbu
��
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5’
��
PH
Pa1
Pb1
P3PA
A8
B8
A7
B7
A6
B6
���Pa5’
���
Pc3’
���
�� Pb4’
������
A2
B2
Pb2
Pa2
A1
B1
T5T3 T4
3SS1
2S 1S
S2
S3
�� ��
8020-18
Cre 7-28490GB Issued 12-00
Boom Raising CircuitTwo supply flows are used to raise the boom.
The P1 pump flow goes through the straight line travel valve or the right-hand travel spool, through the parallelworking passage and the boom (2) spool, before emerging from the boom (1) spool outlet.
The P2 pump flow goes through the second parallel working passage and the boom (1) spool and joins the flowfrom pump P1 to go through the load holding valve and supply oil to the boom cylinders.
Pa8/A8. Boom upPb8/B8. Boom down
Pb4. Boom spool 2
8020-19
Cre 7-28490GB Issued 12-00
CM00K018
Pb9
Pa9
Pc2
���Pb8’
Pa8’
���
Pb7
Pa7
Pb6
Pa6
��PPPT��
P4
A3
B3
Pbu
A5
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5’
B5
PH
Pa1
Pb1
P3PA
����
A7
B7
A6
B6
Pb5
Pa5’
Pa5
Pc3’
Pc3
�� Pb4’
Pb3
Pa3
A2
B2
Pb2
Pa2
A1
B1
T5T3 T4
�� ��
8020-20
Cre 7-28490GB Issued 12-00
Boom Lowering Circuit, Load Holding ValveA single supply flow is used to lower the boom.
When the boom lowering function is operated only the boom (1) spool is piloted.
At the same time, pilot pressure arrives at Pc2 and releases the load holding valve. This allows the oil dischargefrom the boom cylinder large chambers to flow to the return circuit.
Boom Lowering Reinjection CircuitWhen the boom is lowered, boom (1) spool is piloted. The load holding valve is released and part of the oildischarged from the cylinder large chambers can go through a check valve and be reinjected in the cylindersmall chambers. The lower the supply pressure to the cylinder small chambers, the higher the flow reinjected inthis manner will be.
Even if the boom spool is completely closed, an orifice makes it possible for oil to reach the free passage anddevelop pressure (PN) to inform the pump that flow must be reduced. Flow reduction is compensated for by thereinjection circuit, thereby contributing towards a more efficient use of engine power.
Boom Lowering Anti-vibration CircuitDue to the constant loss of oil from the supply source to the free passage, via the orifice, peak pressures andvibrations are avoided, even if the boom lowering control is operated roughly.
Pa8/A8. Boom upPb8/B8. Boom down
Pc2. Boom load holding1. Holding valve
8020-21
Cre 7-28490GB Issued 12-00
CM00K019
Pb9
Pa9
���
�������
Pa8’
���
Pb7
Pa7
Pb6
Pa6
��
T1T2Dr Ps2
405 psi28 bar
PHP3
����
A7
B7
A6
B6
ø 3
T5T3 T4
Pi1 Pi2
A2
a2
(AVANT) (ARRIERE)
A3
Dr B3B1
a3A1 Psv
a1
M
3.92 MPa568 psi 39.2 bar
a3
���
���
��
��
��
1
8020-22
Cre 7-28490GB Issued 12-00
Dipper Extending CircuitThe dipper uses two supply flows.
When the dipper extends, flow from pump A1 arrives at the dipper (1) spool, either via the free passage or afterpassing through the straight line travel valve via the parallel working passage.
Flow from pump A2 arrives at the dipper (2) spool, either via the free passage or after passing through thestraight line travel valve via the parallel working passage. It merges with the other flow just before the dipper (1)spool. In this way, the two flows of oil go through the load holding valve and then on to the dipper cylinder smallchamber. Return to the large chamber is via the two dipper spools, thereby improving efficiency.
Pa5/A5. Dipper outPb5/B5. Dipper inPa9/A9. Dipper spool 2
8020-23
Cre 7-28490GB Issued 12-00
CM00K020
��
��
Pc2
Pb8
Pb8’
Pa8’
Pa8
Pb7
Pa7
Pb6
Pa6
��PPPT��
P4
A3
B3
Pbu
��
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5’
��
PH
Pa1
Pb1
P3PA
A8
B8
A7
B7
A6
B6
���Pa5’
���
Pc3’
Pc3
Pb4
Pb4’
Pb3
Pa3
A2
B2
Pb2
Pa2
A1
B1
ø 3
T5T3 T4
�� ��
8020-24
Cre 7-28490GB Issued 12-00
Dipper Retracting CircuitThe dipper uses two supply flows.
When the dipper retracts flow from pump A1 arrives at the dipper (1) spool, either via the free passage or afterpassing through the straight line travel valve via the parallel working passage.
A2 pump flow arrives at the dipper (2) spool, either via the free passage or after passing through the straight linetravel valve via the parallel working passage. It merges with the other flow just before the dipper (1) spool. In thisway, the two flows of oil go through the load holding valve and then on to the dipper cylinder large chamber.Return to the large chamber is via the two dipper spools, thereby improving efficiency.
Dipper Retracting Reinjection CircuitOil discharging from the small chamber is fed back into the large chamber. The return flow goes through arestrictor and a variable cancellation valve, which force the oil to re-enter the large chamber via a check valve.
When pressure in the large chamber increases, the cancellation valve is piloted by this pressure and reinjectionis progressively brought to a halt.
Pa5/A5. Dipper outPb5/B5. Dipper in
Pa9/Pb9. Dipper spool 2
8020-25
Cre 7-28490GB Issued 12-00
CM00K021
��
��
Pc2
Pb8
Pb8’
Pa8’
Pa8
Pb7
Pa7
Pb6
Pa6
��PPPT��
P4
A3
B3
Pbu
��
���
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5’
��
PH
Pa1
Pb1
P3PA
A8
B8
A7
B7
A6
B6
���Pa5’
���
Pc3’
Pc3
Pb4
Pb4’
Pb3
Pa3
A2
B2
Pb2
Pa2
A1
B1
ø 3
T5T3 T4
�� ��
8020-26
Cre 7-28490GB Issued 12-00
Bucket Opening CircuitThe bucket uses one supply flow which arrives from pump A2 via the parallel working passage.
Pa7/A7. Bucket openingPb7/B7. Bucket closing
CM00K022
Pb9
Pa9
Pc2
Pb8
Pb8’
Pa8’
Pa8
������
Pb6
Pa6
��
T1T2Dr Ps2
405 psi28 bar
PHP3
A8
B8
����
A6
B6
ø 3
T5T3 T4
��
8020-27
Cre 7-28490GB Issued 12-00
Bucket Closing CircuitThe bucket uses one supply flow which arrives from pump A2 via the parallel working passage.
Pa7/A7. Bucket openingPb7/B7. Bucket closing
CM00K023
Pb9
Pa9
Pc2
Pb8
Pb8’
Pa8’
Pa8
������
Pb6
Pa6
��
T1T2Dr Ps2
405 psi28 bar
PHP3
A8
B8
��
��
A6
B6
ø 3
T5T3 T4
��
8020-28
Cre 7-28490GB Issued 12-00
Crusher CircuitThe crusher uses two supply flows.
One flow goes directly to the option, the other is forced into the reinjection valve and merges with the first flowjust before the inlet for the option spool.
When the switch in the cab is tilted to crusher position, current is sent to the second flow electrovalve.
When the option pedal is pressed, pilot pressure is sent through the selector and then the electrovalve. Thereinjection valve is released. This pressure also moves the dipper (2) spool and the latter seals off the freepassage. As a result, flow from pump P2 may be reinjected at the inlet for the option pedal.
P1 pump flow arrives directly at the inlet of the option spool.
The pilot pressure also acts on the reinjection valve priority valve. Dipper (2) spool pilot pressure return oil goesback to the tank via the priority valve. The crusher thereby takes priority but, for example, should the dipper beextended at the same time, one flow goes to the dipper and the other to the crusher.
Pa2/A2. Option circuitPb2/B2. Option circuit
Pa9/Pb9. Dipper spool 2
8020-29
Cre 7-28490GB Issued 12-00
CM00K024
10µ
A
C
B
D
T T
3E�
3D�
Pc2
Pb8
Pb8'
Pa8'
Pa8
Pb7
Pa7
Pb6
Pa6
3�PPPT
3�
P4
A3
B3
Pbu
A5
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5'
B5
PH
Pa1
Pb1
P3PA
A8
B8
A7
B7
A6
B6
Pb5
Pa5'
Pa5
Pc3'
Pc3
Pb4
Pb4'
Pb3
Pa3
$�%�
3E�
3D�
A1
B1
T5T3 T4
A
B
T
P
C
E
D
1 2
P
T
A1 S1
B1 S2 B2
A2 P T
A
A B
$� $�
8020-30
Cre 7-28490GB Issued 12-00
Breaker CircuitThe breaker uses one supply flow.
When the switch in the cab is in breaker position and the option pedal toed forward, the pressure switch closesand sends the information to the calculator, which sets the breaker running at the preselected speed.
The option spool is piloted and pump A1 supplies the breaker with a flow of oil.
Pa2/A2. Option circuitPb2/B2. Option circuit
8020-31
Cre 7-28490GB Issued 12-00
CM00K025
10µ
A
C
B
D
T T
Pb9
Pa9
Pc2
Pb8
Pb8'
Pa8'
Pa8
Pb7
Pa7
Pb6
Pa6
3�PPPT
3�
P4
A3
B3
Pbu
A5
Pc1
Ps1 T1T2Dr Ps2
405 psi28 bar
405 psi28 bar
Pb5'
B5
PH
Pa1
Pb1
P3PA
A8
B8
A7
B7
A6
B6
Pb5
Pa5'
Pa5
Pc3'
Pc3
Pb4
Pb4'
Pb3
Pa3
$�
%�
3E�
3D�
A1
B1
T5T3 T4
A
B
T
P
C
E
D
1 2
P
T
A1 S1
B1 S2 B2
A2 P T
A
A B
$� $�
8020-32
Cre 7-28490GB Issued 12-00
NOTES .....................................................................................................................................................................................
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9010-17
Cre 9-93770EN Issued 07-05
CRIL05G058J01
9010-18
Cre 9-93770EN Issued 07-05
With hydraulic hammer/grab installationNOTE: For a complete view of the hydraulic diagram of the excavator, refer to the main hydraulic diagram.
15 MAIN CONTROL VALVE72 ARTICULATION CYLINDER CONTROL PEDAL79 SHUTTLE BALL BLOCK87 ARTICULATION CYLINDER88 ARTICULATION CYLINDER SAFETY VALVE89 OPTION SECTION90 DIPPER SECTION (2)104 2-WAY VALVES211 2-WAY VALVES308 PRESSURE LIMITER (OPTIONAL)309 FILTER (OPTIONAL)310 6-WAY SELECTOR (OPTIONAL)311 6-WAY SELECTOR (OPTIONAL)312 3/2 SELECTOR (OPTIONAL)380 2-WAY SOLENOID VALVE (OPTIONAL)384 NON-RETURN CHECK VALVE (OPTIONAL)393 SELECTOR (OPTIONAL)B23 BREAKER/GRAB PILOT PRESSURE SWITCHT1 FREE BOSS ON THE RETURN PIPE OF THE MAIN CONTROL VALVE TO THE RESERVOIRT2 T-PIECE RETURN BEHIND THE CABA LOW FLOW SUPPLY (IF EQUIPPED)B WITH LOW FLOW CONTROL (IF EQUIPPED)C LOW FLOW SELECTOR (IF EQUIPPED)
9010-19
Cre 9-93770EN Issued 07-05
CRIL05G059J01
9010-20
Cre 9-93770EN Issued 07-05
F8 F16 F15 F18 F3 F13 F7 F9 F2 F1 F10 F19 F17 F14 F5 F6 F4 F20 F11 F1215A 15A 15A 15A 20A 20A 20A 30A 20A 20A 10A 10A 10A 5A 15A 10A 10A 15A 10A 10A
1.25 YR 2081.25 W 2091.25 R 206
BR 207
RW
220
R 2
21
R 2
23 R 2
22
0.65
GR
231
OW
303
OW
300
1.25
GR
312
1.25
GR
310
1.25
W 3
20
2 W
R 0
50
1.25
GrR
330
1.25
LW
340
1.25
LgR
350
0.85
BrR
360
0.85
VR
370
0.85
OR
375
0.85
LR
380
0.85
LR
381
BrR 547
WR 548
0.85
YR
260
0.85
OR
375
1.25
W 3
221.
25 W
325
0.65
BrW
230
VR
240
LR25
0
VW
280
GW
290
0.85
YR
260
0.85
YW
270
2B
703
GW
303
112
X5
P2
P3
CN 29
12
CN
32
CN
5C
N 6
CN
1
2
1
5V
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Lg
Sb
L
Gr
YW
CN
6
29LW 801
BrW 804
WR 541WR 548
LgW 803
24
3031
2336
20
33342535
26
32
GY 566
24VB
PW 819
VW 800
17
21
19
2827
22
18
5 V24 V
CX210 - CX230 - CX240 - CX290 EXCAVATORELECTRICAL SCHEMATICPart Number 7-27623
NOT USED
NOT USED
CCW
CW
NOT USED
SPARE 3 (PNP)
2 STAGE TRAVEL
SWING BRAKE
SPARE 1 (PNP)
ROTARY LIGHT
NOT USED
BATT. RELAY
CUSHION CONTROL
SWING SHUT OFF
AUDIBLE ALARM
SPARE 2 (PNP)
NOT USED
GND
NOT USED
PWM 2 OUT
2 STAGE RELIEF
PWM 2 RET
GND
GND
GND
POWER 24V
PWM 1 OUT
GND
GND
CONTROL 24V
PWM 1 RET
NOT USED
A/C CONT.
NOT USED
GND
GND
FPC
TEST
NOT USED
NOT USED
NOT USED
CAN H
NOT USED
AUDIBLE ALARM CUT OUT
IMMOBILIZER
NOT USED
NOT USED
CUSHION CONTROL
BREAKER MODE
NOT USED
NOT USED
NOT USED
PRESSURE SWITCH
SWING BRAKE
NOT USED
CAN L
CAN GROUND
GROUND
SW. TO ACCESS
SERIAL OUTPUT
PROTECT
SPARE 13 (CMP)
GROUND
SERIAL INPUT
TA INPUT
RX
TX
SG
TA GND
COOLANT
SWING PILOT
UPPER PILOT
TRAVEL MODE
ONE-TOUCH IDLE
L/M MODE
BREAKER PILOT
AUTO MODE
ENGINE OIL PRESSURE
WARNING CHG.
WORK MODE
SPARE 22
TRAVEL PILOT
SPARE 21
ROTARY LIGHT
SPARE 23
TF
SE
NS
OR
(S
IG)
LIM
P H
OM
E (
RE
D 4
)
PS
(G
E)
PW
R G
ND
TA
CH
O S
EN
SO
R (
GN
D)
RP
M S
EN
SO
R (
SIG
)
NV
VB
RP
M S
EN
SO
R (
GN
D)
PU
LL D
OW
N (
RE
D 4
)
HE
AT
RE
LAY
TA
CH
O S
EN
SO
R (
SIG
)
PS
(G
E)
PW
R V
B
SIG
GN
D (
RE
D 4
)
PW
M S
OLL
(R
ED
4)
VB
B (
RE
D 4
)
PW
M S
OLL
(R
ED
4)
VB
B (
RE
D 4
)
SH
LD (
RE
D 4
)
5V (
RE
D 4
)
GN
D (
RE
D 4
)
5V (
RE
D 4
)
GN
D (
RE
D 4
)
GN
D (
MV
)
V 1
ST
(R
ED
4)
CA
N-L
Q A
DJU
ST
RE
S.
Q A
DJU
ST
RE
S.
CA
N G
ND
CA
N-H
NA
P S
ELE
CT
-3
TW
SE
NS
OR
(S
IG)
CA
N U
SE
SE
LEC
TIN
G S
WIT
CH
ST
AR
T S
WIT
CH
AC
CE
L V
OLU
ME
(5V
)
TH
RO
TT
LE (
SIG
)
TH
RO
TT
LE (
SIG
)
NA
P S
ELE
CT
-1
TH
RO
TT
LE (
GN
D)
NA
P S
ELE
CT
-0
KE
Y S
WIT
CH
KE
Y S
WIT
CH
EN
GIN
E S
TO
P S
IG IN
LIM
P H
OM
E S
W.
AN
TI-
RE
VE
RS
E S
W
ME
MO
RY
CLE
AR
NA
P S
ELE
CT
-2
GN
D
GN
D
EN
GIN
E S
TO
P M
OT
OR
TE
CH
2 (
RX
D)
MA
IN P
OW
ER
(V
B)
CH
EC
KE
R S
ELE
CT
MA
IN P
OW
ER
(V
B)
TE
CH
2 (
TX
D)
VCC
POWER GND
SIG GND
PWM
VB
LIMP HOME
PWM
PULL DOWN
POWER GND
VCC
RACK 1ST
TACHO SENSOR (GND)
TACHO SENSOR (SIG)
VB
ITEM DESCRIPTION
CONNECTORLETTER LOCATED(OUTSIDE CAB)
COLOR OF CONNECTOR(IF NOT INDICATED COLOR IS WHITE)
TABLE OF COLOR SYMBOLS
CIRCUIT NUMBER
SYMBOL
COLORAREA
INDICATES CONSTANT POWER
INDICATES POWER WHEN KEY SWITCH IS ON
CONNECTOR (MALE)
CONNECTED
BOOT GROUND
CONNECTOR (FEMALE)
NOT CONNECTED
SINGLE WIRE CONNECTOR
CONNECTOR NUMBER(IN CAB)
INSULATION AGAINST MAGNETISM
CABLE GROUND
HARNESS
NOTE :
1. "BR" INDICATES BLACK CABLE WITH RED STRIPE.
2. WATERPROOF CONNECTORS USED OUTSIDE OF CAB.
LEGEND
COLOR
BLACK
WHITE
BROWN
PINK
VIOLET
GREEN
ORANGE
RED
YELLOW
LIGHT GREEN
SKY BLUE
BLUE
GRAY
A GND
PRESSURE SENSOR (HBCV)
KEY SW.
BATT. CHARGE
SPARE 12 (CMP)
A VCC
P2 SIG
P1 SIG
THERMO SENSOR (0)
SPARE 9 (A/D)
N1 SIG
A VCC
FUEL SENSOR
A GND
SPARE 11 (A/D)
PRESSURE SWITCH
GN
D (
TW
& T
F S
EN
SO
R)
GND
PROTECT
PROTECT
FILTER
A1. COMPUTER
A2. ENGINE CONTROLLER
A3. ELECTRONIC ACCELERATION
A4. WIPER CONTROLLER
B1. COOLANT TEMPERATURE SENSOR
B2. HYDRAULIC OIL TEMPERATURE SENSOR
B21. ENGINE OIL PRESSURE SWITCH
B22. SWING PILOT PRESSURE SWITCH
B23. BREAKER / CRUSHER PILOT PRESSURE SWITCH
B24. SECOND OPTION PILOT CIRCUIT 2 PRESSURE SWITCH
B25. BREAKER PILOT PRESSURE SWITCH
B26. UPPER PILOT PRESSURE SWITCH (YELLOW BAND)
B27. TRAVEL PILOT PRESSURE SWITCH
B28. SECOND OPTION PILOT CIRCUIT 1 PRESSURE SWITCH
B41. ENGINE RPM SENSOR
B42. PUMP PRESSURE SENSOR (P1)
B43. PRESSURE SENSOR (NEGA-CONT)
B44. PUMP PRESSURE SENSOR (P2) (YELLOW BAND)
B45. OVERLOAD INDICATOR PRESSURE SWITCH
B61. SUNLOAD SENSOR
B81. HORN
E1. WORKING LIGHT (UPPERSTRUCTURE)
E2. WORKING LIGHT (ATTACHMENT)
E3. WORKING LIGHT (CAB)
E4. CAB LIGHT
E51. CIGARETTE LIGHTER
E52. AIR CONDITIONER
F1. FUSE 20A; ENGINE CONTROLLER
F10. FUSE 10A; OPTION LINE AND LUBRICATOR CONNECTOR
F11. FUSE 10A; BACK-UP
F12. FUSE 10A; KEY SWITCH
F13. FUSE 20A; HEATER / AIR CONDITIONER
F14. FUSE 5A; AIR CONDITIONER COMPRESSOR
F15. FUSE 15A; WORKING LIGHT
F16. FUSE 15A; WORKING LIGHT (NOT USED)
F17. FUSE 10A; DC-DC (24V-12V) CONVERTER
F18. FUSE 15A; WIPER AND WASHER
F19. FUSE 10A; HORN
F2. FUSE 20A; COMPUTER CONTROL INSTRUMENT PANEL AND DIAGNOSTIC TEST SOCKET
F20. FUSE 15A; CIGARETTE LIGHTER AND CAB SEAT COMPRESSOR ADJUSTMENT
F21. FUSE BOX
F22. FUSE 20A; MAIN FUSE FOR F11 AND F12 CIRCUITS
F23. FUSE 65A; MAIN FUSE FOR F3 TO F10 AND F13 TO F20 CIRCUITS
F24. FUSE 20A; MAIN FUSE FOR F2 CIRCUIT
F25. FUSE 20A; MAIN FUSE FOR F1 CIRCUITS
F3. FUSE 20A; COMPUTER POWER
F4. FUSE 10A; HYDRAULIC FUNCTION CANCELLATION LEVER SWITCH
F5. FUSE 15A; LUBRICATOR (NOT USED)
F6. FUSE 10A; ROTARY LIGHT
F7. FUSE 20A; FUEL FILLER PUMP
F8. FUSE 15A; ENGINE STOP MOTOR
F9. FUSE 30A; GLOW PLUG
G1. BATTERY
G2. ALTERNATOR
H1. AUDIBLE WARNING DEVICE
K1. RELAY-ENGINE EMERGENCY STOP
K2. RELAY-GLOW PLUG
K3. RELAY-HORN
K4. RELAY-WORKING LIGHT
K5. RELAY-ROTARY LIGHT
K7. RELAY BATTERY
M1. STARTER MOTOR
M2. ENGINE EMERGENCY STOP MOTOR
M3. WIPER MOTOR
M4. WASHER MOTOR
M5. MOTOR (AIR CHANGING)
M6. AIR VENT DIRECTION CONTROL MOTOR
M7. MOTOR ACT (AIR-MIX)
M8. BLOWER MOTOR
P1. INSTRUMENT PANEL
P2. SWITCH PANEL (LEFT-HAND)
P3. SWITCH PANEL (RIGHT-HAND)
P4. MONITOR DISPLAY
P5. HOURMETER
P6. AIR CONDITIONER CONTROL PANEL
R1. GLOW PLUG
R2. FUEL FLOW ADJUSTMENT RESISTOR
R3. THROTTLE VOLUME
R4. THERMISTOR
R5. FUEL SENSOR
S1. KEY SWITCH
S10. WORKING LIGHT SWITCH
S11. WIPER SWITCH
S12. WASHER SWITCH
S13. OVERLOAD SWITCH
S14. BREAKER / CRUSHER SWITCH
S15. HORN SWITCH
S16. ONE TOUCH IDLE
S2. TRAVEL MODE SWITCH
S3. WORK MODE SWITCH
S4. AUTO MODE SWITCH
S5. CUSHION CONTROL SWITCH
S51. HYDRAULIC FUNCTION CANCELLATION LEVER SWITCH
S52. AIR CONDITIONING COMPRESSOR CLUTCH SWITCH
S53. DOOR LIMIT SWITCH
S54. FRONT WINDOW LIMIT SWITCH
S55. RESERVE TANK LSW
S6. ROTARY LIGHT SWITCH
S7. AUDIBLE ALARM CUT OUT SWITCH
S8. SWING BRAKE SWITCH
S9. ENGINE EMERGENCY STOP SWITCH
U1. DC-DC (24V-12V) CONVERTER
W1. ANTENNA
X1. FUEL FILLER PUMP CONNECTOR
X2. ROTARY LIGHT CONNECTOR
X3. OPTINAL POWER CONNECTOR
X4. ENGINE TEST POINT CONNECTOR
X5. CONTROLLER TEST POINT CONNECTOR
X6. CAB SEATCOMPRESSOR MOTOR CONNECTOR
X8. RADIO CONNETOR
X9. ANTI-THEFT SYSTEM CONNETOR
Y1. SWING PILOT SHUT-OFF SOLENOID VALVE (GREEN BAND)
Y2. PILOT PRESSURE SOLENOID VALVE (BLUE BAND)
Y3. SWING BRAKE SOLENOID VALVE (PINK BAND)
Y4. 2 STAGE TRAVEL SOLENOID VALVE (RED BAND)
Y5. POWER-UP SOLENOID VALVE (YELLOW BAND)
Y6. CUSHION CONTROL SOLENOID VALVE (LIGHT GREEN BAND)
Y7. MAIN PUMP PROPORTIONAL SOLENOID
Y8. AIR CONDITIONER MAGNET CLUTCH
Y9. CRUSHER/BREAKER OPTION TWO FLOW SOLENOID VALVE
22
P
Dr
77B
15Pb5
77C
D1
30
GA
T2
Pi
T1 P1
J I
*
27
GB
*
Pm1 Ps
A21
K1
23
A B
MU
C E F DB
T2
P1
P2
16
Pi
B45*
15Pb8
2526
23
P2 P2P3P3
Pi
P1P1 T T
84
C4
C2
P P0
P3
10 µ
P2
P
82
P1
0.103 MPa14.5 psi1 bar
0.02 MPa2.9 psi0.2 bar
51
60
TB
52D143
C5
C3
C1
Pb4'15
29
255
155
44
41
2
1.2
BA
42
59
5 641
83
75
77
58
76
78
85
5354 85
85
85
*
*
*
*
10µ
79B2
78T
52T
83C
30T1
30T2
29T
76A
15A2
42A
15B2
D2
D1
T
10µ
T1
D3
B
B
A
T
P
C
E
D
10µ
TT
DC
D
E
A
P2P3
T5T4P5P4
T
P
T1T2T3P1
3
42
T
P
13
42
1
150 MESH
0.103 MPa14.9 psi1.03 bar
0.03 MPa4.35 psi0.3 bar
0.004 MPa0.58 psi0,04 bar
43
45
30Pi
S1S3S2
1S3S2S
S
B
A
T
E
F
C
R
G
H
D
57
B22
81
0.5 MPa 72.6 psi 5 bar
ON
0.3 MPa43.5 psi 3 bar
OFF
D75
B
C
Pb9
Pa9
72 55
*
*Y9
85
85
*
Pb215
5a415
Pb115 P
73
Pa115
Pa615
Pb615
1
S2B1
A2S1A1
2T
P
1
3T42
P
A
B2
T
0.5 MPa 72.5 psi 5 bar
ON
0.3 MPa43.5 psi 3 bar
OFF
Pi
Pa2
41
15Pb1
*
31µ
RE
D
Pm2
Pm2Ps
T1
P2
P1
RE
D
Pm1
1.5 MPa212 psi15 bar
79B23
B25 **
Pi1 Pi2
A2
a2
A3
DrB4
A4
B3B1
a4A1 Psv
a1
M
a310
ISUZU6BG1T
ISUZU6BG1T
B43 B42 B44Y7
CX240
CX210
CX290
ISUZU6BG1T
AY9A
15Pa8
28
Pc2
Pb8
Pb8'
Pa8'
Pa8
Pb7
A8
B8
A7
B7
*
Ps2
77A
15Pa9
Pa7
Pb6
Pa6
A6
B6
P2 PHP3
15B26B27
ON 2.0 MPa290 psi20 bar
OFF 1.5 MPa217 psi
ON 1.2 MPa174 psi12 bar
OFF 0.9 MPa130 psi
9 bar
PPPTP1 PA
15 bar
0.1MPa14.5 psi1 bar
A5
Pc1
Pb5'
B5
Pb5
Pa5
Pa5
0.29 MPa42.08 psi 2.9 bar
C
554
553
79B1
76D
P4
A3
B3
Pbu
Pa1
Pb1
Pb4
Pb4'
Pb3
Pa3
A2
B2
Pb2
Pa2
A1
B1
2.5
2.5
N1
Ps1 Dr
31
N2
T1T2 T5T3 T4
3
D
F
C
B
A
29 *29*
21
H M3
Y4 Y2
Y5 Y3
Y6Y1
B1 B2
G
32
EPc3'
Pc3
86
79A
L1
K2
L2
73T
* 71
B24
B28
85 *
*
Pa173
Pb173
2T
P
1
1.2 MPa 194 psi 12 bar
ON
0.9 MPa130.5 psi 9 bar
OFF
1.2 MPa 194 psi 12 bar
ON
0.9 MPa130.5 psi 9 bar
OFF
73
B1
A B C
A1
R*
83*
712
Pa1
T
P
551
10A4
76T
Pb1
P
O
15T
43
71
34.3 MPa / 343 bar / 4980 psi
37.3 MPa / 373 bar / 5412 psi
39.2 MPa / 392 bar / 5688 psi
39.2 MPa / 392 bar / 5688 psi
39.2 MPa / 392 bar / 5688 psi
392 MPa / 392 bar / 5688 psi
39.2 MPa / 392 bar / 5688 psi
39.2 MPa / 392 bar / 5688 psi
39.2 MPa / 392 bar / 5688 psi
39.2 MPa / 392 bar / 5688 psi
3.92 MPa / 39.2 bar / 568 psi
27.9 MPa / 279 bar / 4048 psi
29.4 MPa / 294 bar / 4264 psi
27.9 MPa / 279 bar / 4048 psi
29.4 MPa / 294 bar / 4264 psi
35.3 MPa / 353 bar / 5119 psi
35.3 MPa / 353 bar / 5119 psi
2.55 MPa / 25.5 bar / 370 psi
1.5 MPa / 15 bar / 212 psi
23.5 MPa / 235 bar / 3410 psi
20.6 MPa / 206 bar / 2988 psi
121,4 Kwà 2150 tr/mn
103 Kwà 1950 tr/mn
132,4 Kwà 2000 tr/mn
CX210 - CX230 - CX240 - CX290 EXCAVATORHYDRAULIC SCHEMATICNumber 7-27623
LEGEND
RH REARRH FRONT
LH REARLH FRONT
RIGHTLEFT
PUMP 1
PUMP 2
PILOT SYSTEM PUMP
RETURN TO RESERVOIR
LEAK-OFF RETURN
PILOT SYSTEM CIRCUIT
COMPONENT BOUNDARY
HOSE
PIPING CONNECTION
PIPING CROSS-OVER
COMPONENT ITEM NO.
COMPONENT NUMBER
CONNECTION ITEM NO.
OPTION ITEM NO.
DIPPER (1)
BOOM (1)
TRAVEL
RIGHT
LEFT
EXTENDED
RETRACTED
CLOSED
OPEN
REAR
FRONT
SWING
BOOM (2)
DIPPER (2)
BUCKET
RETRACTED
EXTENDED
FRONT
REAR
ON
HAMMER (H)
TRAVEL
CLOSEDOPENLOWER RAISE
BOOM BUCKET
REARFRONTFRONTREAR
TRAVEL (LEFT)
(FRONT) (REAR)
TRAVEL (RIGHT)
RIGHTLEFTRETRACT EXTENDSWINGDIPPER
RAISE
LOWER
RETRACTED
EXTENDED
OPTIONAL
RAISE
LOWER
CX
210 - CX
230 - CX
240 - CX
290 EX
CA
VA
TO
RH
YD
RA
UL
IC / E
LE
CT
RIC
SC
HE
MA
TIC
1. HYDRAULIC RESERVOIR
2. BREATHER
4. BY-PASS VALVE
5. SCREEN FILTER
6. RETURN FILTER
10. MAIN HYDRAULIC PUMP
15. MAIN CONTROL VALVE
16. HYDRAULIC SWIVEL
21. TRAVEL MOTOR
22. SWING MOTOR
23. TRAVEL MOTOR BRAKE
25. RIGHT BOOM CYLINDER
26. LEFT BOOM CYLINDER
27. DIPPER CYLINDER
28. BUCKET CYLINDER
29. BOOM SAFETY VALVE
30. DIPPER SAFETY VALVE
31. DIPPER LOAD HOLDING VALVE
32. BOOM LOAD HOLDING VALVE
41. FILTER (ULTRA-CLEAN)
42. OIL COOLER
43. RETURN MANIFOLD
44. OIL COOLER BY-PASS VALVE
45. NON-RETURN CHECK VALVE
51. ACCUMULATOR
52. 6 SOLENOID VALVE BANK
53. BOOM & BUCKET CONTROL LEVER
54. SWING & DIPPER CONTROL LEVER
55. TRAVEL CONTROL PEDAL
57. BOOM & DIPPER CONTROL SHOCK ABSORBER
58. PILOT AND RETURN SYSTEM MANIFOLD
59. FILTER
60. PILOT SYSTEM MANIFOLD
72. CONTROL PEDAL (OPTIONAL)
75. FLOW RE-INJECTION BLOCK (OPTIONAL)
76. 3-WAY SELECTOR (OPTIONAL)
77. SAFETY VALVE RETURN SYSTEM MANIFOLD (OPTIONAL)
78. RETURN FILTER (OPTIONAL)
79. CONTROL SHUTTLE BLOCK (OPTIONAL)
81. SWING SHUTTLE BLOCK
82. PILOT CIRCUIT FILTER
83. SHUT-OFF VALVE (OPTIONAL)
84 T-SHUTTLE BLOCK (OPTIONAL)
85. HAND/FOOT CONTROL PILOT FILTER
86. PILOT FILTER BY-PASS VALVE
B22. SWING PILOT PRESSURE SWITCH
B23. BREAKER / CRUSHER PILOT PRESSURE SWITCH
B25. BREAKER PILOT PRESSURE SWITCH
B26. UPPER PILOT PRESSURE SWITCH (YELLOW BAND)
B27. TRAVEL PILOT PRESSURE SWITCH
B42. PUMP PRESSURE SENSOR (P1)
B43. PRESSURE SENSOR (NEGA-CONT)
B44. PUMP PRESSURE SENSOR (P2) (YELLOW BAND)
B45. OVERLOAD INDICATOR PRESSURE SWITCH
Y1. SWING PILOT SHUT-OFF SOLENOID VALVE (GREEN BAND)
Y2. PILOT PRESSURE SOLENOID VALVE (BLUE BAND)
Y3. SWING BRAKE SOLENOID VALVE (PINK BAND)
Y4. 2 STAGE TRAVEL SOLENOID VALVE (RED BAND)
Y5. POWER-UP SOLENOID VALVE (YELLOW BAND)
Y6. CUSHION CONTROL SOLENOID VALVE (LIGHT GREEN BAND)
Y7. MAIN PUMP PROPORTIONAL SOLENOID
Y9. CRUSHER/BREAKER OPTION TWO FLOW SOLENOID VALVE
A = MAIN RELIEF (STANDARD)
A = MAIN RELIEF (BOOST)
B = BOOM RAISING PORT SECONDARY RELIEF
B1/B2 = RELIEF ON BOOM HBCV
C = BOOM LOWERING PORT SECONDARY RELIEF
D = DIPPER OUT PORT SECONDARY RELIEF
D1 = RELIEF ON DIPPER HBCV
E = DIPPER IN PORT SECONDARY RELIEF
F = BUCKET OPEN PORT SECONDARY RELIEF
G = BUCKET CLOSE PORT SECONDARY RELIEF
H = PILOT PRESSURE RELIEF
I = RIGHT-HAND SWING PORT SECONDARY RELIEF (CX 290)
J = LEFT-HAND SWING PORT SECONDARY RELIEF (CX 290)
K1/K2 = TRAVEL REVERSE PORT SECONDARY RELIEF
L1/L2 = TRAVEL FORWARD PORT SECONDARY RELIEF
N1/N2 = NEGATIVE CONTROL RELIEF
51 = ACCUMULATOR
O/P = SECONDARY RELIEF (2eme OPTION)
R = MAIN RELIEF (2eme OPTION)
ITEM DESCRIPTION
ITEM DESCRIPTION PRESSURE SETTING
SECONDOPTION