Kubota KX91-3a User Manual

II-61
WSM Minor Change II Service Engineering Section
3. Specifications of pump
Model: PSVL-54CG Piston pump power constant characteristics: KX161-3D, U45-3D
Piston pump power constant characteristics: KX161-3S
Item Specifications Remarks
Basic spec.
Displacement Piston pump
13.0 ~ 54.0 cm
3
/rev
Gear pump -
Pilot pump
4.0 cm
3
/rev
Gear pump
Direction of rotation Right (Clockwise) As seen from the shaft
Pilot relief set press 3.9 MPa
Drain pressure Less than 0.098 MPa
Section press -0.04 ~ 0.07 MPa
HYD. oil: VG46, HYD. oil temp: 50 qC,
2450 rpm
Filter 10 Pm equivalent
Straner 150 mesh
HYD. contamination classes Within NAS 9
Customer spec.
Engine horse power
KX161-3D, U45-3D 28.7 / 29.4 kw
KX161-3S 34.6 kw (Gross)
Shaft speed
KX161-3D, U45-3D
1000 ~ 2250 rpm
Max. unloaded:
less than 2450 rpm
KX161-3S
1000 ~ 2200 rpm
Max. unloaded:
less than 2450 rpm
Max. working Pres-
sure
Piston pump 24.5 MPa Piston pump pressure: P
Gear pump -
Pilot pump 4.12 MPa
Pilot pump pressusre: P
p
Max. pump flow
Piston pump 118.8 (121.5) L/min at 2200 (2250) rpm
Gear pump -
Pilot pump 8.8 (9.0) L/min at 2200 (2250) rpm
Max. input torque
KX161-3D, U45-3D 108.0 (108.0) Nm at 2200 (2250) rpm
KX161-3S 118.0 Nmat 2200 rpm
HYD. oil
Oaphny super hydro 46
Shell terras K46
VG46 equivalent
Hydraulic oil temperature at tank
Ordinary use: -10 ~ +80qC
Short time use: -20 ~ +90qC
Drive system Input shaft: Direct drive No radial load
General spec.
All efficiency (Typical value) 79 % VG46, 50 qC, 2200 rpm, 13.7 MPa
Control method
Power constant control
Load sensing control
Proportional LS control pressure
Horse power setting 24.8 kw at 2200 rpm
Max. pump flow (Piston pump) 118.8 r 2.5 L/min VG46, 50 qC, 2200 rpm, P=Min.
Max. input torque 105.1 ~ 108.0 Nm at 2200 rpm
Pilot pump flow Mor than 8.0 L/min
VG46, 50 qC, 2200 rpm, P
0
=4.12 MPa
LS control pressure 1.45 r 0.05 MPa
VG46, 50 qC, 2200 rpm, P
LS
=9.8 MPa
Proportional LS control pressure
1.45 r 0.05 MPa (at 2200 rpm)
0.73 r 0.1 MPa (at 1000 rpm)
VG46, 50 qC, P
LS
=9.8 MPa
SHAFT SPEED 2200rpm
TOTAL INPUT TORQUE 108.0
-2.9
PRESSURE [MPa] DELIVERY FLOW [L/min] PRESSURE [MPa] DELIVERY FLOW [L/min]
PA0= 0.0 QA0= 118.8 PB0= 0.0 QB0= 118.8r2.5
PA1= 9.2 QA1= 117.8 PB1= 7.8 QB1= 117.2r2.5
PA2= 15.3 QA2= 66.0 PB2= 10.8 QB2= 104.1r4.0
PA3= 24.5 QA3= 33.5 PB3= 12.7 QB3= 87.0r4.0
PB4= 16.6 QB4= 61.4r5.0
PB5= 23.5 QB5= 37.0r5.0
SHAFT SPEED 2200rpm
TOTAL INPUT TORQUE 108.0
-2.9
PRESSURE [MPa] DELIVERY FLOW [L/min] PRESSURE [MPa] DELIVERY FLOW [L/min]
PA0= 0.0 QA0= 118.8 PB0= 0.0 QB0= 118.8r2.5
PA1= 10.7 QA1= 117.3 PB1= 10.0 QB1= 117.3r2.5
PA2= 16.7 QA2= 72.0 PB2= 12.0 QB2= 109.0r4.0
PA3= 24.5 QA3= 43.8 PB3= 15.0 QB3= 85.5r4.0
PB4= 18.0 QB4= 68.8r5.0
PB5= 24.5 QB5= 43.8r5.0
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0
PRESSURE: P [MPa]
DELIVERY FLOW: Q [L/min]
PRESSURE: P [MPa]
DELIVERY FLOW: Q [L/min]
P-Q Curve
P-Q Curve
0

Kubota KX91-3a Specifications

General

Brand	Kubota
Model	KX91-3a
Category	Excavators
Language	English