26
Page 6-7 Kobelco Hydraulic Schematic Section Kobelco America Inc.
Page 6-7
Kobelco Hydraulic Schematic Section
Kobelco America Inc.
Page 6-8
NOTE:The information listed in the troubleshooting table is for reference only. The troubleshooting table was developed around the SK210 and SK250 Negative Control Dynamic Acera.
Page 6-9
Troubleshooting Table SK210 and SK250 Negative Control
O O O O O O O O O O O
O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O
O O O O O O O O O O O
O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O
O O O O O O O O O O O
O O O O O O O O O O O O
O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O O O O O O O O O O O O O OO
O O O
OO
O O
OO
OO
O
O
O
O
O
O
O O
O O
O O
O O O
O
Bucket dump (full lever, conflux)
O O
O O
Bucket digging (Full lever, conflux) O O
OO OOOO OO O O
O
O O O OO O
Travel left + Arm
Travel right + Arm
Travel right + Swing
Travel left + Boom
Travel left + Bucket
Travel RH and LH (1st speed)
Travel right + Bucket
Swing
Travel left + Swing
Arm in heavy digging (Full lever, sequence conflux)
Arm out inching
Arm in + Swing (Swing priority)
Travel RH and LH + Boom raise
Arm out full lever
Arm in inching
Arm in full lever
Bucket digging (F
Bucket dump
Travel RH and LH (2nd speed)
Travel right + Boom
P1
Neg
- C
on v
alve
P2
Neg
- C
on v
alve
Boom raise inching
Boom lower
Boom raise full lever
Code
Boo
mA7 SV-3 B
ucke
t Cyl
inde
r
Boo
m lo
ck v
alve
Arm
lock
val
ve
LH tr
avel
Mot
or
Sw
ing
mot
or
Boo
m c
ylin
der
Arm
Cyl
inde
r
PSV P2
A3 PSV
B
A4 PSV
C
A6 PSV
A
A6 PSV
E
A7 PSV
F
A8 PSV
H
SE1 ~
SE10
SE22 ~
SE23
SE26 ~
SE27
PSV P1
SE28
P1
by-p
ass
cut v
alve
P2
by-p
ass
cut v
alve
Other
Neg
a-C
on b
ack
pres
sure
val
ve
RH
Tra
vel m
otor
Trav
el s
traig
ht v
alve
Boo
m c
onflu
x va
lve
Arm
var
iabl
e re
circ
ulat
ion
Arm
T2
valv
e
Arm
Sw
ing
Trav
el ri
ght
Trav
el le
ft
O OO O
P2
pum
p
Electrical circuit Hydraulic Device
Buc
ket
Arm
con
flux
valv
e
Ind.
Tra
vel p
ropo
. Val
ve
Sw
ing
prio
rity
prop
o. V
alve
Ind.
Tra
vel p
ropo
. Val
ve
Motor CylinderControl valve
A5 PSV
D
Low
pre
ssur
e se
nsor
Hig
h pr
essu
re s
enso
r
Neg
a-C
on s
enso
r
Bac
k pr
essu
re s
enso
r
P1
pum
p pr
opo.
val
ve
P2
pum
p pr
opo.
val
ve
P1
by-p
ass
cut p
ropo
. val
ve
Att
boos
t sol
. Val
ve
P1
pum
pSw
ing
park
ing
brak
e
so
leno
id v
alve
A8 SV-1
Trav
el 2
-spe
ed s
olen
oid
valv
e
Leve
r loc
k
A2 SV-2
A1 SV-4
Arm
var
iabl
e re
circ
ulat
ion
pr
opo.
val
ve
P2
by- p
ass
cut p
ropo
. val
ve
Trav
el S
traig
ht p
ropo
. val
ve
O
O
O
O
O
O
Independent Travel Travel and Boom upIndependent Travel Travel / Boom up & Swing
O O
Page 6-10
SK160 - Neutral Corcuit Positive Control
SK160 Schematic SectionItem #
a1a2a3a4a5a6a7a8a9A1A2A3A4
PSV1PSV2
PH1PH2
SE-22SE-23
B1B3
Dr3P3
Supply oil for P3 pumpDrain for pilot pump P3Pilot pump
Pump high pressure port P2High pressure sensor P1 pumpHigh pressure sensor P2 pumpSupply oil for P1 and P2 pump
proportional solenoid valve P1 pumpproportional solenoid valve P2 pumpPump high pressure port P1
Delivery port P1 pumpDelivery port P2 pumpDelivery port P3 pump
Test port P2 pump High Pressure
Test port P3 Pilot Pressure
Test port P2 proportional solenoid valve (PSV2)Test port P1 proportional solenoid valve (PSV 1)
Hydraulic Pump Schematic LegendDescription
Test port P1 pump High Pressure
1 Main Hydraulic pump2 Main Control Valve3 Swing Motor4 Travel Motor Assy.567 Arm Cylinder8 Bucket Cylinder9 Swivel Joint
10 Left hand pilot valveRight hand pilot valve
11 Travel pilot valve12 Oil Cooler13 Pilot filter manifold14 Accumulator15 Suction strainer16 8 Solenoid block17 Return filter 18 By-pass check valve19 Tank breather 20 Return check valve 21 Return check valve (oil cooler)22 One way check assy.23 Independent by-pass valve24 Independent by-pass solenoid25 Swing priority solenoid
Kobelco Hydraulic Schematic Legend
Description
Boom Cylinders
Item #
26 Slow return check30 Swing priority/Breaker Option Valve
Page 6-11
SK160 Neutral Circuit Positive Control
SK160 - Neutral Corcuit Positive Control
Page 6-12
ED190 Hydraulic Schematic
ED190 - Neutral Circuit Positive Control
D1 CONTROL VALVE DOZERD2 SOLENOID DOZERD3 PILOT CONTROL
SE9 PRESSURE SENSOR TRAVELSE10 PRESSURE SENSOR TRAVEL
Item #a1a2a3a4a5a6a7a8a9A1A2A3A4
PSV1PSV2
PH1PH2
SE-22SE-23
B1B3B4
Dr3P3 Pilot pump
Supply oil for P4 pump
High pressure sensor P2 pumpSupply oil for P1 and P2 pumpSupply oil for P3 pump
Drain for pilot pump P3
proportional solenoid valve P2 pumpPump high pressure port P1Pump high pressure port P2High pressure sensor P1 pump
Delivery port P2 pumpDelivery port P3 pumpDelivery port P4 pumpproportional solenoid valve P1 pump
Test port P3 Pilot Pressure
Delivery port P1 pump
Test port P1 proportional solenoid valve (PSV-1Test port P2 proportional solenoid valve (PSV-2
Test port P4 Dozer pump
Hydraulic Pump Schematic LegendDescription
Test port P1 pump High Pressure Test port P2 pump High Pressure
1 Main Hydraulic pump2 Main Control Valve3 Swing Motor4 Travel Motor Assy.567 Arm Cylinder8 Bucket Cylinder9 Swivel Joint
10 Left hand pilot valveRight hand pilot valve
11 Travel pilot valve12 Oil Cooler13 Pilot filter manifold14 Accumulator15 Suction strainer16 8 Solenoid block17 Return filter 18 By-pass check valve19 Tank breather 20 Return check valve 21 Return check valve (oil cooler)22 One way check assy.23 Independent by-pass valve24 Independent by-pass solenoid25 Swing priority solenoid26 Slow return check30 Swing priority/Breaker Option Valve
Kobelco Hydraulic Schematic LegendDescription
Boom Cylinders
Item #
Page 6-13
ED190 Neutral Circuit Positive Control
ED190 - Neutral Circuit Positive Control
Page 6-14
SK210~290 Schematic Section1 Main Hydraulic pump2 Main Control Valve3 Swing Motor4 Travel Motor Assy.567 Arm Cylinder8 Bucket Cylinder9 Swivel Joint
10 Left hand pilot ValveRight hand pilot valve
11 Travel pilot valve12 Oil Cooler13 Pilot filter manifold14 Accumulator15 Suction strainer16 8 Solenoid block17 Return filter 18 Bypass check valve19 Tank breather 20 Return check valve 21 Return check valve 22 Slow return check valve23 Independent travel bypass valve24 Independent travel solenoid valve25 Swing priority solenoid26 Slow return check valve27 One way check for swing priority
Kobelco Hydraulic Schematic LegendDescription
Boom Cylinders
Item #
30 Swing priority/Breaker Option ValveT.S. Temperature sensor
Item #a1a2a3a4a5a6a7a8a9A1A2A3A4
PSV1PSV2
PH1PH2
SE-22SE-23
B1B3
Dr3P3
PN1PN2
Hydraulic Pump Schematic LegendDescription
Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P1 proportional solenoid valve (PSV-1)Test port P2 proportional solenoid valve (PSV-2)Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P3 Pilot Pressure Test port P1 proportional solenoid valve (PSV-1)Test port P2 proportional solenoid valve (PSV-2)Delivery port P1 pumpDelivery port P2 pumpDelivery port P3 pump
proportional solenoid valve P1 pumpproportional solenoid valve P2 pumpPump high pressure port P1Pump high pressure port P2High pressure sensor P1 pump
Pilot pumpSignal line from P1 section of main control valveSignal line from P2 section of main control valve
High pressure sensor P2 pumpSupply oil for P1 and P2 pumpSupply oil for P3 pumpDrain for pilot pump P3
SK210 ~ 250 - Neutral Circuit Negative Control
Page 6-15
PGPA
PB
M
DB
VA
VB
D
P
P
VB
VA
D
BUCKET DIGGING
BUCKET DISCHARGE
BOOM RAISING
BOOM LOWERING
SWING LEFT
SWING RIGHT
ARM DIGGING
ARM DISCHARGE
Ø0.8
Dra
PTb
PBc DIG.
PAc DIS
Bc DIG
P2 NUTRAL CUT
PBb LOW.
PAb RAI
Ab RAI
PCb
PA1
P2 P1
PAa DIG.
ARM
ARMCONFLUENCE
SWING
PBS RIG.
PAS LEF.
LEF. AS
BS RIG.
PBa DIS.
Ba DIS.
Pis
T
BUCKET
PCa
Aa DIG.Bb LOW.
PB1
BOOM CONFLUENCE
Ac DIS
PAL FOR.
PBr REV.
PAr FOR.
Br REV.
Ar FOR.
TRAVEL LEFTAL FOR.
PBL REV.
BL REV.
TRAVEL RIGHT
TRAVEL PRIORITY
BOOM
P1 NUTRAL CUTARM VARIABLERECIRCULATION
PLc2 DIG.
T2
Ø1.7X4
Ø1.7X4
PL1
3.14MPaat35L
3.14MPaat35L
37.7MPaat30L
39.7MPaat 30L37.7MPa
at30L
39.7MPaat30L
39.7MPaat30L
37.7MPaat30L
Pn1
Ø14-Ø12.8
Drb
95æm
21 3 2 4 3 1 4
T PT P
SWING
LEFTTRAVEL
RIGHTTRAVEL
Ø0.4
Ø0.4
Ø3.5
Ø0.4
CMR1
CMR2
CT1
CP1
LCc
LCb
CRb
CCa
X1
(P3)
CRa
LCa
CCb
CT2CP2
LCs
Drc
(T3)
Tn1
PLc1
27.9MPaat180L
TRAVELINDEPENDENTS/V
TRAVELINDEPENDENTVALVE
P T
Pn1'
Ø1.0
B1
PN1
A3B3
a7
Dr3
a3
PN2
a4
A2A1PSV2PSV1
PH1
a2
P1 P2
210L
10.0cc/rev
M
ARM&SWINGPILOT VALVE
BOOM&BUCKETPILOT VALVE
a1a5 a6
PH2
LEFT TRAVEL REVERSE
RIGHT TRAVEL FORWARD
RIGHT TRAVEL REVERSE
LEFT TRAVEL FORWARD
B
A
Drd MB
MA
Ø0.6
Ø0.6
Ø0.3
Ø0.3
Pcr35.8?37.3MPa
MA
MB
Pcr 35.837.3MPa
Ø0.3
Ø0.3
Ø0.6
Ø0.6
a8a9
A
P
C
D
B
2
SE10
TRAVEL
PILOT VALVE
SE9
3 6 4 1 5
Dr
SE8 SE2SE3
P PPPPP
SE5
P
SE7
P
SE6 SE4 SE1
Ø1.4Ø1.4
P
TA1
(P4)
AO1
BO1
PAo1
PBo1
147kPa490kPa
Ø0.4
Pn2'
Pn2
SE28
Tn2
P2
A1 A3 A4
P1
T
A8A7A6A5A2
ARM VARIABLERECIRCULATION
SWINGP/B
TRAVEL1/2SPEEDCHANGEOVER
LEVERLOCK
P1NEUTRALCUT
ATTBOOSTING
TRAVELPRIORITY
P2NEUTRALCUT
T.S
SE22 SE23
SE26
SE27
Pi2
Pi1
Dr
T
P2
P1
A2
A1
TP
37.7MPaat30L
37.7MPaat30L
Ø1.0
Ø1.0
Ø1.2
SG
A
C
F
E
D
B
3
9
4
4
15
10 10
16
P
1
P
1817
2
ACC14
13
PP
11
25
P
16
P
P
21
2019
23
24
22
26
27
MR1
12
30
R.H.L.H.
BOOM
BUCKET
ARM
7
6
5
8
BOOM
L.H.
R.H.
SK210 ~ 290 Neutral Control Negative Control
SK210 ~ 250 - Neutral Circuit Negative Control
Page 6-16
DNEGELCITAMEHCSCILUARDYH
#METI NOITPIRCSED
1 pmuPciluardyHniaM
2 evlaVlortnoCniaM
3 rotoMgniwS
4 .yssArotoMlevarT
5 )HL(rednilyCmooB
6 )HR(rednilyCmooB
7 rednilyCmrA
8 rednilyCtekcuB
9 tnioJleviwS
01 sevlaVlortnoCtoliPdnaHthgiRdnatfeL
11 evlaVlortnoCtoliPlevarT
21 retliFtoliP
31 reniartSnoitcuSknaT.dyH
41 kcolBdioneloS8
51evlaVssap-yBdnaretliFnruteRciluardyH
61
71 evlaVrehtaerBriA
81 evlaVkcehCnruteRciluardyH
Minor Change SchematicDNEGELCITAMEHCSCILUARDYH
#METI NOITPIRCSED
91 evlaVkcehCnruteRciluardyH
02 evlaVkcehCrotcirtseRdexiF
12 evlaVkcehCrotcirtseRdexiF
22 evlaVlevarTtnednepednI
32 sdioneloSlevarTtnednepednI
42 relooCliO
52 evlaVdioneloSytiroirPgniwS
62 evlaVlortnoCtoliPrezoD
72 evlaVlortnoCrezoD
82 tfeL-rednilyCtfiLedalB
92 thgiR-rednilyCtfiLedalB
03 tfeL-elgnAedalB
13 thgiR-elgnAedalB
23 rednilyCtliTedalB
33 sdioneloStoliP/taolFrezoD
43 sdioneloSthgiR/tfeLelgnAedalB
15 evlaVrekaerB
COLOR CODING STANDARD FOR HYDRAULIC CIRCUITS
Blue ................. Feed, drain, tank circuit
Green............... Return, make up circuit,
Neutral control circuit
Red................... Primary pilot pressure,
Orange ............. Main P1 pump delivery pressure,
Violet ................ Main P2 pump delivery pressure,
Blue tone ......... Valve operation to drain
Red solenoid tip....... In active and exciting
Page 6-17
Minor Change SK210/250
41324 132
TPARM AND SWINGBO0M AND BUCKET
MAIN CONTROL VALVE
INDEPENDENT TRAVEL SOLENOIDS
INDEPENDENT TRAVEL VALVE
PB3
PA3
PA4 PB4 PB1PA1
PA2 PB2
HANDCONTROLVALVE
¯ 0.8
HYD. TANK
P T
SWING
B
PB
A
DB
M
PA
PG
TP
A2
¯ 1.0
¯ 1.4
E HB ACD
¯ 1.0
BUCKET DUMPBUCKET DIGGING
BOOM UPBOOM DOWN
SWING LEFTSWING RIGHT
ARM INARM OUT
BOOMCYLINDERS
BUCKETCYLINDER
ARMCYLINDER
SE5
A1
¯ 1.4
SOL/V BLOCK
TRAVELPILOT VALVE TP
63251
SE10
TRAVELPILOT VALVE
SE9
4
RIGHT TRAVEL FORWARD
LEFT TRAVEL REVERSE
RIGHT TRAVEL REVERSE
LEFT TRAVEL FORWARD
Pi1 Pi2
T2
P1' P2'
a1 a2
SE23SE22
A3D3
PH1
a2A1 A2a1PH2
M
PSVP2
PN2
a4
PN1
a5
B3
B1
a3
Dr
PSVP1
SE1 SE7P PPP
SE2 SE8PSE3
PSE4
REG
¿0.6
Pcr
Pcr ¿0.8¿0.6
¿0.6VB
VA
P P
VA
VB
REG
T
MBD
MA
TRAVEL RIGHT TRAVEL LEFT MB
MA
D
T
¿0.3
¿0.3 ¿0.3
¿0.3
4
PCa
Pisc
BsAs
T
¯ 0.4¯ 0.4
¯ 3.5
¯ 0.4
P2 P1
PL1PTb
Drb
PBr
PAr
CMR1
CMR2
BrAr
Dra
PBc
PAc
BcAc
PBb
Bb
CT1
CP1
LCc
LCb
Ab
PCb
PA1
CRb
X1
CAr
PAa
LCa
CCb
Pss
PBL
PALAL
BL
T2
CT2 CP2
LCs
PB1
Drc PBa
(T3)
PLc2Drd
Pis
PAbPLc1
CCa
Ba
PAs
CRa
¯ 0.4
PBsPBs2
Aa
TB(P4)
¯ 1.4
P2 NUTRAL CUT
ARM
ARMCONFLUENCE
SWING
BUCKET BOOM CONFLUENCE
TRAVEL LEFT
TRAVEL RIGHT
STRAIGHT TRAVEL
BOOM
P1 NUTRAL CUTARM VARIABLERECIRCULATION
P2
A1
A3
A4
P1 T
A8
A7
A6
A5
A2
ARM VARIABLERECIRCULATION
SWINGP/B
TRAVEL 1/2SPEEDCHANGEOVER
LEVERLOCK
P1 NEUTRALCUT
ATTBOOSTING
TRAVELSTRAIGHT
P2 NEUTRALCUT
17
2 19
10
6
5
16
3
7
21
12
1824
8
P
9
21
15
20
23
14
11
P P
SE11P
13
22
PP
1
~85
psi
~85
psi
NIBBLER/BREAKER PEDAL (Optional)
(Optional)
Minor Change SK210LC/SK250LC-6E NEUTRAL CIRCUIT: Positive Control function with Safety Lever Down (Unlocked) and 2nd Travel solenoid activated
4050 psi at 46.5Gal/min
725 psiat 5.3Gal/min
5192~5395 psi5192
~539
5 ps
i
4975 psi at 37Gal/min
5468 psi at 32Gal/min
5468 psiat8Gal/min
at8Gal/min5758 psi
5468 psiat8Gal/min
5758 psiat8Gal/min
5758 psiat 8 Gal/min
5468 psiat 7.9 Gal/min
5468 psiat 8Gal/min
5468 psiat 8 Gal/min
0.7 psi/9.9psi
71 psi
36 psi
Ao2
Bo2
PAo2
PBo2
(P3)
50
B AC1
PT
C2
53
BREAKER
NIBBLER
B N
5251
25
(Optional)
Page 6-18
1 Main Hydraulic pump2 Main Control Valve3 Swing Motor4 Travel Motor Assy.567 Arm Cylinder8 Bucket Cylinder9 Swivel Joint
10 Left hand pilot ValveRight hand pilot valve
11 Travel pilot valve12 Oil Cooler13 Pilot filter manifold14 Accumulator15 Suction strainer16 8 Solenoid block17 Return filter 18 Bypass check valve19 Tank breather 20 Return check valve 21 Return check valve 22 Slow return check valve23 Independent travel bypass valve24 Independent travel solenoid valve25 Swing priority solenoid26 Slow return check valve27 One way check for swing priority30 Swing priority/Breaker Option Valve
T.S. Temperature sensor
Kobelco Hydraulic Schematic Legend
Description
Boom Cylinders
Item #
Item #a1a2a3a4a5a6a7a8a9A1A2A3A4
PSV1PSV2
PH1PH2
SE-22SE-23
B1B3
Dr3P3
Hydraulic Pump Schematic LegendDescription
Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P1 proportional solenoid valve (PSV-1)Test port P2 proportional solenoid valve (PSV-2)Test port P1 pump High Pressure Test port P2 pump High Pressure Test port P3 Pilot Pressure Test port P1 proportional solenoid valve (PSV-1)Test port P2 proportional solenoid valve (PSV-2)Delivery port P1 pumpDelivery port P2 pumpDelivery port P3 pump
proportional solenoid valve P1 pumpproportional solenoid valve P2 pumpPump high pressure port P1Pump high pressure port P2High pressure sensor P1 pump
Pilot pump
High pressure sensor P2 pumpSupply oil for P1 and P2 pumpSupply oil for P3 pumpDrain for pilot pump P3
Page 6-19
490kPa(5 Kgf/cm2)
41324 132
TPARM AND SWINGBO0M AND BUCKET
MAIN CONTROL VALVE
INDEPENDENT TRAVEL SOLENOIDS
INDEPENDENT TRAVEL VALVE
PB3
PA3
PA4 PB4 PB1PA1
PA2 PB2
HANDCONTROLVALVE
¯ 0.8
HYD. TANK
P T
SWING
(285 Kgf/cm2)27.9MPaat180 VL/min
B
PB
A
DB
M
PA
PG
TP
A2
¯ 1.0
¯ 1.4
E HB ACD
¯ 1.0
BUCKET DUMPBUCKET DIGGING
BOOM UPBOOM DOWN
SWING LEFTSWING RIGHT
ARM INARM OUT
BOOMCYLINDERS
BUCKETCYLINDER
ARMCYLINDER
SE5
245kPa (2.5 Kgf/cm2)
A1
¯ 1.4
SOL/V BLOCK
TRAVELPILOT VALVE TP
63251
SE10
TRAVELPILOT VALVE
SE9
4
RIGHT TRAVEL FORWARD
LEFT TRAVEL REVERSE
RIGHT TRAVEL REVERSE
LEFT TRAVEL FORWARD
Pi1 Pi2
T2
P1' P2'
a1 a2
SE23SE22
A3D3
PH1
a2A1 A2a1PH2
M
PSVP2
PN2
a4
PN1
a5
B3
B1
a3
Dr
PSVP1
5.0MPa (51 Kgf/cm2)at 20L/min
SE1 SE7P PPP
SE2 SE8PSE3
PSE4
REG
¿0.6
Pcr
35.8~37.2 MP
a
Pcr
35.8
~37.
2 M
Pa
(365
.8~3
7.2
Kgf
/cm
2 ) (365.8~37.2 Kgf/cm
2)
¿0.8¿0.6
¿0.6VB
VA
P P
VA
VB
REG
T
MBD
MA
TRAVEL RIGHT TRAVEL LEFT MB
MA
D
T
¿0.3
¿0.3 ¿0.3
¿0.3
4
PCa
Pisc
BsAs
T
¯ 0.4¯ 0.4
¯ 3.5
¯ 0.4
P2 P1
PL1PTb
Drb
PBr
PAr
CMR1
CMR2
BrAr
Dra
PBc
PAc
BcAc
PBb
Bb
CT1
CP1
LCc
LCb
Ab
PCb
PA1
CRb
X1
CAr
PAa
LCa
CCb
Pss
PBL
PALAL
BL
T2
CT2 CP2
LCs
PB1
Drc PBa
(T3)
PLc2Drd
Pis
PAbPLc1
CCa
Ba
PAs
CRa
¯ 0.4
PBsPBs2
Aa
TB(P4)
¯ 1.4
P2 NEUTRAL CUT
ARM
ARMCONFLUENCE
SWING
BUCKET BOOM CONFLUENCE
TRAVEL LEFT
TRAVEL RIGHT
TRAVEL PRIORITY
34.3MPa (350 Kgf/cm2) at 140L/min
37.7MPa (385 Kgf/cm2) at 120L/min
BOOM
P1 NEUTRAL CUTARM VARIABLERECIRCULATION
(385 Kgf/cm2)37.7MPa
at30L/min39.7MPa(405 Kgf/cm2)
at30L/min
37.7MPa(385 Kgf/cm2)at30L/min
39.7MPa (405 Kgf/cm2)at30L/min
39.7MPa(405 Kgf/cm2)at30L/min
(385 Kgf/cm2)37.7MPa
at30L/min
P2
A1
A3
A4
P1 T
A8
A7
A6
A5
A2
ARM VARIABLERECIRCULATION
SWINGP/B
TRAVEL 1/2SPEEDCHANGEOVER
LEVERLOCK
P1 NEUTRALCUT
ATTBOOSTING
TRAVELPRIORITY
P2 NEUTRALCUT
17
2 19
10
6
5
16
3
7
21
12
1824
8
P
9
21
15
20
23
14
11
P P
13
22
PP
1
643
~6K
g/cm
2
~6K
g/cm
2
Minor Change SK290LC-6E NEUTRAL CIRCUIT: Positive Control function with Safety Lever Down (Unlocked) and Fast Travel activated
Ao1
Bo1
PAo1
PBo1
37.7MPaat 30L 37.7MPa
at 30L50
(P3)
25
P2
P1TPi1
SK290LC/SK330LC-6E Dynamic Acera TM, 09/03 Rev.1
25
(Optional)
Secondary pilot pressure: 6 Kgf/cm2 ~ 30 Kgf/cm2 (85.3 ~ 426.7 psi)
System drain pressure: 2.5 Kgf/cm2 ~ 5 Kgf/cm2 (35.6 ~ 71.1 psi)
Filter drain pressure: 0.05 Kgf/cm2 ~ 1.05 Kgf/cm2 (0.7 ~ 14.9 psi)
Pump flow circuit: 5 Kgf/cm2 (71.1 psi)
Primary pilot pressure: 51 Kgf/cm2 (725 psi)
Spool operation to drain
Pump feed circuit
Case drain pressure: 0.05 Kgf/cm2 ~ 0.7 Kgf/cm2 (0.7 ~ 9.9 psi)
LEGEND
Minor Change SK290
Page 6-20
SK330 Schematic Section
SK330 - Neutral Circuit Neagtive Control
1 Main Hydraulic pump2 Main Control Valve3 Swing Motor4 Travel Motor Assy.567 Arm Cylinder8 Bucket Cylinder9 Swivel Joint
10 Left hand pilot ValveRight hand pilot valve
11 Travel pilot valve12 Oil Cooler13 Pilot filter manifold14 Accumulator15 Suction strainer16 8 Solenoid block17 Return filter 18 Bypass check valve19 Tank breather 20 Return check valve 21 Return check valve 22 Slow return check valve23 Independent travel bypass valve24 Independent travel solenoid valve25 Swing priority solenoid26 Slow return check valve27 One way check for swing priority30 Swing priority/Breaker Option Valve
Description
Boom Cylinders
Item #
T.S. Temperature sensor
Kobelco Hydraulic Schematic Legend
Item #a1a2a3a4a5a6a7a8a9A1A2A3A4
PSV1PSV2
PH1PH2
SE-22SE-23
B1B3
Dr3P3
PN1PN2
Pilot pumpSignal line from P1 section of main control valveSignal line from P2 section of main control valve
High pressure sensor P2 pumpSupply oil for P1 and P2 pumpSupply oil for P3 pumpDrain for pilot pump P3
proportional solenoid valve P2 pumpPump high pressure port P1Pump high pressure port P2High pressure sensor P1 pump
Delivery port P2 pumpDelivery port P3 pump
proportional solenoid valve P1 pump
Test port P3 Pilot Pressure Test port P1 proportional solenoid valve (PSV-1)Test port P2 proportional solenoid valve (PSV-2)Delivery port P1 pump
Test port P1 proportional solenoid valve (PSV-1)Test port P2 proportional solenoid valve (PSV-2)Test port P1 pump High Pressure Test port P2 pump High Pressure
Hydraulic Pump Schematic LegendDescription
Test port P1 pump High Pressure Test port P2 pump High Pressure
Page 6-21
∅ 0. 7
SK330 T2 spool
SK330 - Neutral Circuit Neagtive Control
Page 6-22
SK480 Hydraulic Schematic
SK480 - Neutral Circuit Negative Control
1 Main Hydraulic pump2 Main Control Valve3 Swing Motor4 Travel Motor Assy.567 Arm Cylinder8 Bucket Cylinder9 Swivel Joint
10 Left hand pilot ValveRight hand pilot valve
11 Travel pilot valve12 Oil Cooler13 Pilot filter manifold14 Accumulator15 Suction strainer16 8 Solenoid block17 Return filter 18 Bypass check valve19 Tank breather 20 Return check valve 21 Return check valve 22 Slow return check valve23 Independent travel bypass valve24 Independent travel solenoid valve25 Shuttle valve
T.S. Temperature sensor
Kobelco Hydraulic Schematic LegendDescription
Boom Cylinders
Item #
Item #a1a2a3a4a5a6a7a8a9A1A2A3A4
PSV1PSV2
PH1PH2
SE-22SE-23
B1B3
Dr3P3
PN1PN2
Pilot pumpSignal line from P1 section of main control valveSignal line from P2 section of main control valve
High pressure sensor P2 pumpSupply oil for P1 and P2 pumpSupply oil for P3 pumpDrain for pilot pump P3
proportional solenoid valve P2 pumpPump high pressure port P1Pump high pressure port P2High pressure sensor P1 pump
Delivery port P2 pumpDelivery port P3 pump
proportional solenoid valve P1 pump
Test port P3 Pilot Pressure Test port P1 proportional solenoid valve (PSV-1)Test port P2 proportional solenoid valve (PSV-2)Delivery port P1 pump
Test port P1 proportional solenoid valve (PSV-1)Test port P2 proportional solenoid valve (PSV-2)Test port P1 pump High Pressure Test port P2 pump High Pressure
Hydraulic Pump Schematic LegendDescription
Test port P1 pump High Pressure Test port P2 pump High Pressure
Page 6-23
SK480 - Neutral Circuit Negative Control
GENERAL HYDRAULIC SPECIFICATIONS
Dynamic Acera MC Training, 09/03 Rev. 0
10
GENERAL HYDRAULIC SPECIFICATIONS
Page 06a-1Dynamic Acera MC Training, 09/03 Rev. 0
10
Table of contentsSK160LC/ED190 TECHNICAL SPECIFICATIONS ................................................................................................ 06a-2SK210LC/SK250LC-6E TECHNICAL SPECIFICATIONS...................................................................................... 06a-4SK290LC/SK330LC-E TECHNICAL SPECIFICATIONS........................................................................................ 06a-6
Page
READ, UNDERSTAND AND FOLLOW ALL SAFETY PRECAUTIONS AND PROCEDURES FOUND IN THIS MANUALBEFORE ATTEMPTING ANY OPERATION, INSPECTION OR MAINTENANCE OF THIS MACHINE, ATTACHMENTOR SYSTEMS. KOBELCO CANNOT ANTICIPATE EVERY POSSIBLE CIRCUMSTANCE THAT MIGHT INVOLVE APOTENTIAL HAZARD. THE WARNINGS IN THIS PUBLICATION AND ON THE PRODUCT ARE THEREFORE NOTALL INCLUSIVE. IF A TOOL, PROCEDURE, WORK METHOD OR OPERATING TECHNIQUE NOT SPECIFICALLYRECOMMENDED BY KOBELCO IS USED, YOU MUST SATISFY YOURSELF THAT IT IS SAFE FOR YOU ANDOTHERS. YOU SHOULD ALSO ENSURE THAT THE PRODUCT WILL NOT BE DAMAGED OR MADE UNSAFE BYTHE OPERATION, LUBRICATION, MAINTENANCE AND/OR REPAIR PROCEDURES YOU CHOOSE.
W A R N I N G
GENERAL HYDRAULIC SPECIFICATIONS
Page 06a-2 Dynamic Acera MC Training, 09/03 Rev. 0
10
Swingshocklessvalve
IP
Reliefvalve
2-M12 depth 24
FRONT
Lifting cap. 220 Kg (2 bolts)
M
IP
PA
MDB
PBPA
A,B
PG
A
PG
B
PB
L
DB
Rotation direction (Viewed from shaft end)Oil inlet A ....... Clockwise (CW)Oil inlet B ....... Counterclockwise (CCW)
edoC emaN eziSeuqroT
)m-fgK(m-NledoM
B,A tropniaM 4/3FP-2)71(761
M troppu-ekaM4/3FP E6-CL012KS~CL061KS
1FP )22(612 E6-CL052KS
BD tropniarD8/3FP )5.7(47 E6-CL012KS~CL061KS
2/1FP )01(89 E6-CL033KS
BP,AP tropeguaG
4/1FP )7.3(63
GP tropesaelerekarB
L troplevellioraeG 2/1TP )6.6(56
PI troplevellioraeG 4/3TP )01(89
DOZER PUMP
PSV-P1
PSV-P2
a4: Located underP2 regulator
a7
a10
a7
a1
a2
a3
OR6 OR5
MRV OR9
OR10
OR4OR1 OR7
OR9
MRV OR1 OR4
MRV
OR2OR3
OR9
OR1
OR4 OR10
OR1 OR4
OR8OR10
a1: P1 high pressure porta2: P2 high pressure porta3, a4: Secundary pilot pressure ports on pumpproportional solenoids PSV-P1 and PSV-P2a7: Primary pilot pressure porta10: Main pressure port for dozer circuitMRV: Main relief valveOR1: Port relief for bucket dig functionOR2: Port relief for bucket dump functionOR3: Port relief for boom up functionOR4: Port relief for boom down functionOR7: Port relief for arm in functionOR8: Port relief for arm out functionOR9: Port relief for nibbler close functionOR10: Port relief for nibbler open functionPSV-P1: Proportional solenoid valve for P1PSV-P2: Proportional solenoid valve for P2NBV: Nibbler/Breaker ValveAVR: Arm Variable Recirculation ValveBC: Boom Conflux ValveTL: Travel Left ValveTP: Travel Priority ValveP1NC: P1 Neutral Cut ValveBHV: Boom Holding ValveAC: Arm Conflux ValveP2NC: P2 Neutral Cut ValveAHV: Arm Holding Valve
SK160LC/ED190-6E DYNAMIC ACERA(MINOR CHANGE)
LS VIEW
TOP VIEW
NBV
AVR
P1NC
ARMBCSWINGTL
TP TR BUCKET BOOM
BHV
AC
P2NC
AHV
BOTTOMVIEW
GENERAL HYDRAULIC SPECIFICATIONS
Page 06a-3Dynamic Acera MC Training, 09/03 Rev. 0
10
091D
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GENERAL HYDRAULIC SPECIFICATIONS
Page 06a-4 Dynamic Acera MC Training, 09/03 Rev. 0
10
YQ109SWingMotor&CV
Swingshocklessvalve
IP
Reliefvalve
2-M12 depth 24Lifting cap. 220 Kg (2 bolts)
M
IP
PA
MDB
PBPA
A,B
PG
A
PG
B
PB
L
DB
Rotation direction (Viewed from shaft end)Oil inlet A ....... Clockwise (CW)Oil inlet B ....... Counterclockwise (CCW)
FRONT
edoC emaN eziSeuqroT
)m-fgK(m-NledoM
B,A tropniaM 4/3FP-2)71(761
M troppu-ekaM4/3FP E6-CL012KS~CL061KS
1FP )22(612 E6-CL052KS
BD tropniarD8/3FP )5.7(47 E6-CL012KS~CL061KS
2/1FP )01(89 E6-CL033KS
BP,AP tropeguaG
4/1FP )7.3(63
GP tropesaelerekarB
L troplevellioraeG 2/1TP )6.6(56
PI troplevellioraeG 4/3TP )01(89
OR6 OR5
MRVOR9
OR10
OR4
OR1
a1: P1 high pressure porta2: P2 high pressure porta3, a4: Secundary pilot pressure ports on pumpproportional solenoids PSV-P1 and PSV-P2a7: Primary pilot pressure porta10: Main pressure port for dozer circuitMRV: Main relief valveOR1: Port relief for bucket dig functionOR2: Port relief for bucket dump functionOR3: Port relief for boom up functionOR4: Port relief for boom down functionOR7: Port relief for arm in functionOR8: Port relief for arm out functionOR9: Port relief for nibbler close functionOR10: Port relief for nibbler open functionPSV-P1: Proportional solenoid valve for P1PSV-P2: Proportional solenoid valve for P2SE22: High pressure sensor for P2 circuitSE23: High pressure sensor for P1 circuitNBV: Nibbler/Breaker ValveAVR: Arm Variable Recirculation ValveBC: Boom Conflux ValveTL: Travel Left ValveTP: Travel Priority ValveP1NC: P1 Neutral Cut ValveBHV: Boom Holding ValveAC: Arm Conflux ValveP2NC: P2 Neutral Cut ValveAHV: Arm Holding Valve
OR7OR9
MRV OR1 OR4
MRV
OR2OR3
OR9
OR1
OR4 OR10
OR1 OR4
OR8OR10
a2
SE23
SE22a1
PSV-P1
a9PSV-P1
a8
SK210LC/SK250LC-6E DYNAMIC ACERA(MINOR CHANGE)
LS VIEW
TOP VIEW
NBV
AVR
P1NC
ARMBCSWINGTL
TP TR BUCKET BOOM
BHV
AC
P2NC
AHV
BOTTOMVIEW
GENERAL HYDRAULIC SPECIFICATIONS
Page 06a-5Dynamic Acera MC Training, 09/03 Rev. 0
10
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5142
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op
orP
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tuclartuen1
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nievitca
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gnitoohselbuort.
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isp001~0:lartue
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022~002(024~004:evitc
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017~007(
sgnidaererusserp:eto
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rotinom
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pumoobllat
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w.noitisop
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3-D
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011~59:lartueN
isp)
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063~043(052~042:evitc
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elttorhthti
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mrA
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210L
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0LC
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TEC
HN
ICA
L SP
ECIF
ICAT
ION
S
GENERAL HYDRAULIC SPECIFICATIONS
Page 06a-6 Dynamic Acera MC Training, 09/03 Rev. 0
10
Swingshocklessvalve
IP
Reliefvalve
2-M12 depth 24Lifting cap. 220 Kg (2 bolts)
M
IP
PA
MDB
PBPA
A,B
PG
A
PG
B
PB
L
DB
Rotation direction (Viewed from shaft end)Oil inlet A ....... Clockwise (CW)Oil inlet B ....... Counterclockwise (CCW)
FRONT
edoC emaN eziSeuqroT
)m-fgK(m-NledoM
B,A tropniaM 4/3FP-2)71(761
M troppu-ekaM4/3FP E6-CL012KS~CL061KS
1FP )22(612 E6-CL052KS
BD tropniarD8/3FP )5.7(47 E6-CL012KS~CL061KS
2/1FP )01(89 E6-CL033KS
BP,AP tropeguaG
4/1FP )7.3(63
GP tropesaelerekarB
L troplevellioraeG 2/1TP )6.6(56
PI troplevellioraeG 4/3TP )01(89
a2
SE23
SE22a1
PSV-P1
a9PSV-P1
a8
a1: P1 high pressure porta2: P2 high pressure porta3, a4: Secundary pilot pressure ports on pumpproportional solenoids PSV-P1 and PSV-P2a7: Primary pilot pressure porta10: Main pressure port for dozer circuitMRV: Main relief valveOR1: Port relief for bucket dig functionOR2: Port relief for bucket dump functionOR3: Port relief for boom up functionOR4: Port relief for boom down functionOR7: Port relief for arm in functionOR8: Port relief for arm out functionOR11: Braker function relief valveOR12: Port relief for swing priority functionPSV-P1: Proportional solenoid valve for P1PSV-P2: Proportional solenoid valve for P2SE22: High pressure sensor for P2 circuitSE23: High pressure sensor for P1 circuitNBV: Nibbler/Breaker ValveAVR: Arm Variable Recirculation ValveBC: Boom Conflux ValveTL: Travel Left ValveTP: Travel Priority ValveP1NC: P1 Neutral Cut ValveBHV: Boom Holding ValveAC: Arm Conflux ValveP2NC: P2 Neutral Cut ValveAHV: Arm Holding ValveAT2: Arm T2 Valve (SK330LC only)
OR6 OR5
MRV
OR12
OR4OR1
OR11
OR11
OR7
MRV OR1 OR4
OR11
OR12
MRV
OR2OR3
OR1
OR4
OR1 OR4
OR8
OR12
SK290LC/SK330LC-6E DYNAMIC ACERA(MINOR CHANGE)
LS VIEW
TOP VIEW
BreakerValve
AVR
P1NC
ARMBCSWINGTL
TP TR BUCKET BOOM
BHV
AC
P2NC
AHV
BOTTOMVIEW
AT2
GENERAL HYDRAULIC SPECIFICATIONS
Page 06a-7Dynamic Acera MC Training, 09/03 Rev. 0
10
E6-C
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op
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tuclartuen2
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isp001~09:lartue
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053~043(isp
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isp054~004:lartue
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027~007(isp
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dionelos.porP
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SP
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isp082~072:lartue
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085~065(isp
064~044:evitcA
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gninrutlevartS
R
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VS
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SL
tnednepednIevlavlevart
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m063~053(
isp073~063:evitc
A)
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086~076(
levart,dekcollevarT
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elttorhthti
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hgihtatnednepednI
evlavlevart2
pmup
F-V
SP
21-D
33…N
10.1
0 S
K29
0LC
/SK
330L
C T
ECH
NIC
AL
SPEC
IFIC
ATIO
NS
GENERAL HYDRAULIC SPECIFICATIONS
Page 06a-8 Dynamic Acera MC Training, 09/03 Rev. 0
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