PISTON PUMPS
“A3H” Series Variable Displacement Piston Pumps
“A3H” Series High Pressure Variable Displacement Piston Pumps
■ Features
01 Control System for Wide Range Application:
Wide range of Delivery Volume
7 models from A3H16 to A3H180 meet the wide range
of delivery volume from 16.3 to 180.7 cm3/rev.
Compact SizeBecause of output power Vs. mass ratio is high , A3H -
Series pumps could be designed in quite small size.
operating pressure.
Case for A3H37 under the condition of pressure
350 Kgf/cm2 and shaft speed 1800 r/min, the
volumetric efficiency is 95% (or above) and the
overall efficiency is 90% (or above).
High Performance to meet 350 Kgf/cm2
of max.
Volumetric Efficiency
Overall Efficiency
Output Flow
Input Power
0
20
40
Inpu
t P
ow
er
kW
Eff
icie
ncy
100
80
60 60
40
0Ou
tpu
t F
low L/m
in.
20
%
Pressure Kgf/cm²
0 50 100150200250 300350
N=1800 r/min.“01
”Pressure
Compensator Type
“09”
Constant Power
Control Type
“14”
Load Sensing
Type
For these controls system, consult YUKEN for details.
EIC-A-1003-0
64
Pressure
Ou
tput
Flo
w
Pressure
Ou
tput
Flo
w
Pressure
Ou
tput
Flo
w
“A3H” Series Variable Displacement Piston Pumps
Hydraulic Fluids
■ Hydraulic Fluids.Use petroleum base oils such as anti-wear type
hydraulic oils or R & O (Rust and oxidation
inhibitor) type hydraulic oils (ISO VG 32 or 46) with
a viscosity range of 20 to 400 cSt at temperature of
0-600C both to be satisfied.
■ Control of contamination.
■ Mounting.
■ Alignment of Shaft.
■ Suction Pressure.
■ Hints on Piping.
■ Suction Piping.
■ Drain Piping.
[Volume of Pre-Fill Oil Required]
■ Recommended Drain Piping Size.
Model Number Fitting Size Inside Dia.
of Pipe
A3H16, A3H37 1/2”
(Inside dia. 12 mm or more)
12 mm
or more
A3H56, A3H71,
A3H100, A3H145,
A3H180
3/4”
(Inside dia. 16 mm or more)
19 mm
or more
■ Safety valve
■ Bleeding Air.
■ Starting.
Model
Number
Volume
cm3
A3H16 400
A3H37 700
A3H56 900
A3H71 1300
A3H100 1700
A3H145 2400
A3H180 3200
PISTON PUMPS
Much care should be taken to maintain control over
contamination of the operating oil which can
otherwise lead to breakdown and shorten the life of
the unit. Please maintain the degree of contamination
within NAS Grade 10.
The suction port must be equipped with at least a
100 µm (150 mesh) reservoir type filter and the
return line must have a line type filter of under
10 µm.
When installing the pump the filling port should be
positioned upwards.
Employ a flexible coupling whenever possible, and
avoid any stress from bending or thrust.
Maximum permissible misalignment is less than
0.1mm TIR and maximum permissible misangularity
is less than 0.20.
Permissible suction pressure at suction port of the
pump is between -0.16 and +0.5 Kgf/cm2
(-127 mm
Hg~+0.5 Kgf/cm2). In case of the speedis over 1800
r/min., adjust the pressure 0 to +0.5 Kgf/cm².
For piping to the suction port, use pipes of the same
diameter as that of the specified pipe flange. Make
sure that the height of the pump suction port is
within one meter from the oil level in the reservoir.
When using steel pipes for the suction or discharge
ports, excessive load from the piping to the pump
generates excessive noise.
Whenever there is fear of excessive load, please use
rubber hoses.
In case the pump is installed above the oil level, the
suction piping and suction line filter should be
located lower than the pump position to prevent air
in the suction line.
Install drain piping according to the chart and ensure
that pressure within the pump housing should be
maintained at a normal Pressure of less than
1 Kgf/cm2 and surge pressure of less than 5 Kgf/cm2.
Length of piping should be less than 1m, and the
pipe end should be submerged in oil.
When delivery line is blocked suddenly, surge
pressure is occurred so a relief valve should be set in
the circuit to eliminate any damage on equipment
and piping.
It may be necessary to bleed air from pump case and
outlet line to remove causes of vibration.
Before starting, first fill the pump case with clean
operating oil through the fill port.
In order to avoid air blockage when first starting,
adjust the control valves so that the discharged oil
from the pump is returned directly to the tank or the
actuator moves in a free load.
65
A
“A3H” Series High Pressure Variable
Displacement Piston Pumps
Instructions
“A3H” Series Variable Displacement Piston Pumps
■ Setting Discharge Pressure and DeliveryAt the time of Dispatch, the unit has been preset to the maximum delivery and minimum discharge pressure.
Adjust the preset delivery and pressure to meet your system requirements.
Adjustment of Discharge Pressure
Turning the adjustment screw clockwise,
increases pressure.
Model Numbers Adjustment
Pressure Kgf/cm2
A3H16, A3H37, A3H56-01 55
A3H71, A3H100, A3H145-01 63
A3H180-01 57
Adjustment of Delivery
[The minimum adjustable flow and adjustable
volume of each full turn of the delivery
adjustment screw]
Model
Numbers
Adjustable volume with
each full turn of the
adjustment screw
cm3/rev.
Minimum
adjustment
flow
cm3/rev.
A3H16 1.4 8
A3H37 3.3 16
A3H56 4.2 35
A3H71 4.9 45
A3H100 6.2 63
A3H145 9.4 95
A3H180 10.3 125
PISTON PUMPS
[Pressure adjusted by each one turn
of the pressure adjustment screw]
Turning the flow adjustment screw clockwise,
decreases delivery.
Lock the screw after adjustment.
5 10 15 20
20
0
40
60
80
100
120
140
160
180
200
A3H16
A3H37
A3H56
A3H71
A3H100
A3H145
A3H180
Adj. Screw Protrusion Length (L)
Geo
met
ric
Dis
pla
cem
ent
cm³/rev.
mm
LCover
RetainerLock Nut
Flow Adj.
Screw
■ Flow Adj. Screw Protrusion length ‘L’ Vs Geometric Displacement (Reference)
66
“A3H” Series Variable Displacement Piston Pumps
“A3H” Series Variable Displacement Piston Pumps-Single pump,
Pressure Compensator type
■ Model Number Designation
Model Number
Geometric Displacement
cm3/rev.
Min Adj. Flow
cm3/rev.
Operating Pressure
Kgf/cm2
Shaft Speed
r/min.
Approx. Mass
Kg.
Rated*1
Intermittent Max.*2
Min. Flange
Mounting
Foot
Mounting
A3H16-※R01KK-10 16.3 8.0
280 350
3600 600 14.5 23.4
A3H37-※R01KK-10 37.1 16.0 2700 600 19.5 27.0
A3H56-※R01KK-10 56.3 35.0 2500 600 25.7 33.2
A3H71-※R01KK-10 70.7 45.0 2300 600 35.0 42.5
A3H100-※R01KK-10 100.5 63.0 2100 600 44.6 72.6
A3H145-※R01KK-10 145.2 95.0 1800 600 60.0 88.0
A3H180-※R01KK-10 180.7 125.0 1800 600 70.4 98.4
*1 Consult YUKEN when pump is used over rated pressure because, there is a restriction on operating condition.
*2 The Max. shaft speeds shown in the above table are at suction pressure 0 Kgf/cm2.
*3 The table above shows specifications for using Petroleum based oils.
■ Specifications
M
O
PISTON PUMPS
Graphic Symbol
*1 Available to supply pump with anti-clockwise rotation. Consult YUKEN for details.
*2 We are also supplying spline-type shaft extension. Consult YUKEN for details.
67
A
“A3H” Series High Pressure Variable
Displacement Piston Pumps
A3H16 -F R 01 K K -10
Series
Number Mounting
Direction
of
Rotation
Control
Type
Pressure Adj.
Range
Kgf/cm2
Shaft∗2
Extension
Design
Number
A3H16
(16.3cm3/rev.)
F :
Flange
Mounting
L :
Foot Mounting
(Viewed from Shaft End)
R :
Clockwise∗1
(Normal)
01 :
Pressure
Compensator
Type
K:
50~350
K:
Keyed Shaft
10
A3H37
(37.1cm3/rev.)
A3H56
(56.3cm3/rev.)
A3H71
(70.7 cm3/rev.)
A3H100
(100.5cm3/rev.)
A3H145
(145.2cm3/rev.)
K:
Keyed Shaft
44.45 mm Dia
K1:
Keyed Shaft
50.8 mm Dia
A3H180
(180.7cm3/rev.)
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ Performance Characteristics Curve
Typical Performance Characteristics of “A3H16” Oil Viscosity 32 cSt [ISO VG 32, 400C]
N=1500 r/min. N=1800 r/min. N=3600 r/min.kW
Inp
ut
Po
wer
20
15
10
5
010 15 20 25 30
Output Flow L/min.
kW
Inp
ut
Po
wer
20
15
10
0
kW
Inp
ut
Po
wer
20
15
10
0
5
5
25
30
35
40
10 15 20 25 30
Output Flow L/min.
20 30 40 50 60
Output Flow L/min.
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
250 Kgf/cm²
150 Kgf/cm²
280 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
250 Kgf/cm²
150 Kgf/cm²
280 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
250 Kgf/cm²
150 Kgf/cm²
280 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
500
60
70
80
50 100 150 200 250 300 35050
0
60
70
80
50 100 150 200 250 300 35050
0
60
70
80
50 100 150 200 250 300 350
No
ise
Lev
el
Pressure Kgf/cm²
dB(A)
No
ise
Lev
el
Pressure Kgf/cm²
dB(A)
No
ise
Lev
el
Pressure Kgf/cm²
dB(A)N=1500 r/min. N=1800 r/min. N=2500 r/min.
Full Cut-off Full Cut-off
Full Cut-off
Full Flow Full Flow
Full Flow
■ Noise Level (dB): [One metre horizontally away from pump head cover]
■ Input Power
■ Full Cut-off Power ■ Drain
Dra
in
3600 r/min.
1800 r/min.
1500 r/min.
3600 r/min.
1800 r/min.1500 r/min.
3600 r/min1800 r/min.1500 r/min.
Full Cut-off
Full Flow
50 100 150 200 250 300 350
Full Cut-off Pressure Kgf/cm² Pressure Kgf/cm²50 100 150 200 250 300 350
0
1
2
3
4
Fu
ll C
ut-
off
Po
wer
kW 5
L/min.
0
1
2
3
4
5
Note: The dotted line in the graph indicates less than minimum adjustable flow.
68
Pressure Kgf/cm²
0 50 100150200250300350
Pressure Kgf/cm² Pressure Kgf/cm²
N=1500 r/min.Volumetric efficiency
Overall efficiency
Output Flow
Input Power
Input Power
0 50 100150200250300350
N=1800 r/min. N=3600 r/min.
0 50 100 150200250300350
Volumetric efficiencyVolumetric efficiency
Overall efficiency Overall efficiency
Input Power
Output Flow Output Flow
Eff
icie
ncy
100
80
60 30
20
0Outp
ut
Flo
w L/m
in.
0
10
20
Inp
ut
Po
wer
kW
10
%
Eff
icie
ncy
100
80
60 30
20
0
10
%
Eff
icie
ncy
100
80
60 60
40
0
20
%
0
10
20
Inp
ut
Po
wer
kW
0
20
40
Inp
ut
Po
wer
kW
Outp
ut
Flo
w L/m
in.
Outp
ut
Flo
w L/m
in.
N=2500 r/min.N=1800 r/min.N=1500 r/min.
Nois
e L
evel
dB(A)
50
60
70
80
Nois
e L
evel
dB(A)
50
60
70
80
Nois
e L
evel
dB(A)
50
60
70
80
Pressure Kgf/cm²0 50 100 150 200 250 300 350
Pressure Kgf/cm²0 50 100 150 200 250 300 350
Pressure Kgf/cm²0 50 100 150 200 250 300 350
Full Cut-off Full Cut-off
Full Cut-off
Full Flow Full FlowFull Flow
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ Performance Characteristic Curve
Typical Performance Characteristics of “A3H37” Oil Viscosity 32 cSt [ISO VG 32, 400C]
■ Noise Level (dB): [One metre horizontally away from pump head cover]
■ Input Power
■ Full Cut-off Power ■ Drain
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
280 Kgf/cm²
150 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
250 Kgf/cm²
N=1500 r/min. N=1800 r/min.
N=2700 r/min.
20 25 30
Output Flow L/min.35 40 45 50 55 60
kW
Inp
ut
Pow
er
35
30
25
20
15
10
5
0
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
280 Kgf/cm²
150 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
250 Kgf/cm²
20 30 40 50 60 70 80
kW
Inp
ut
Pow
er
60
50
40
30
20
10
030 40 50 60 70 80 90 100
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
280 Kgf/cm²
150 Kgf/cm²
300 Kgf/cm²
250 Kgf/cm²
350 Kgf/cm²
kW
Inp
ut
Pow
er
60
50
40
30
20
10
0
65
Output Flow L/min. Output Flow L/min.
50 100 150 200 250 300 350
Full Cut-off Pressure Kgf/cm²
0
2
4
6
8
10
Full
Cu
t-off
Pow
er
kW
0
2
4
6
8
10
Dra
in
L/min.
50 100 150 200 250 300 350
Pressure Kgf/cm²
2700 r/min
1800 r/min1500 r/min
2700 r/min.1800 r/min.1500 r/min.
2700 r/min.1800 r/min.1500 r/min.
Full Cut-off
Full Flow
Note: The dotted line in the graph indicates less than minimum adjustable flow.
69
A
“A3H” Series High Pressure Variable
Displacement Piston Pumps
Volumetric efficiencyN=1500 r/min. N=1800 r/min. N=2700 r/min.
Volumetric efficiency Volumetric efficiency
Overall efficiency Overall efficiency Overall efficiency
Output Flow
Output Flow
Input Power
Input Power
Input Power
Pressure Kgf/cm² Pressure Kgf/cm² Pressure Kgf/cm²
Eff
icie
ncy
100
80
60
40
20
0
60
Eff
icie
ncy
100
80
60
40
20
0Outp
ut
Flo
w L/m
in.
60
Eff
icie
ncy
100
80
60
80
200
120
60
40
100
0 Inp
ut
Po
wer
20
40
kW
0 Inp
ut
Po
wer
20
40
kW
0 Inp
ut
Po
wer
40
80
kW
80
0 50 100150200250300350 0 50 100150200250300350 0 50 100150200250300350
Output Flow
% % %
Outp
ut
Flo
w L/m
in.
Outp
ut
Flo
w L/m
in.
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ Performance Characteristic Curve
Typical Performance Characteristics of “A3H56” Oil Viscosity 32 cSt [ISO VG 32, 400C]
■ Noise Level (dB): [One metre horizontally away from pump head cover]
■ Input Power
■ Full Cut-off Power ■ Drain
1500, 1800 r/min.
2500 r/min.
1800 r/min.1500 r/min.
2500 r/min.
2500 r/min.
1500, 1800 r/min.
0
2
4
6
8
10
Fu
ll C
ut-
off
Po
wer
kW
0
2
4
6
8
10
50 100 150 200 250 300 350
Full Cut-off Pressure Kgf/cm²50 100 150 200 250 300 350
Pressure Kgf/cm²
Dra
in
L/min.
Full Cut-off
Full Flow
N=1500 r/min. N=1800 r/min. N=2500 r/min.
Nois
e L
evel
dB(A)
50
60
70
80
90
Nois
e L
evel
dB(A)
50
60
70
80
90
Nois
e L
evel
dB(A)
50
60
70
80
90
Pressure Kgf/cm²0 50 100 150 200 250 300 350
Pressure Kgf/cm²0 50 100 150 200 250 300 350
Pressure Kgf/cm²0 50 100 150 200 250 300 350
Full FlowFull Flow
Full Flow
Full Cut-off Full Cut-off
Full Cut-off
Note: The dotted line in the graph indicates less than minimum adjustable flow.
70
N=1500 r/min. N=1800 r/min. N=2500 r/min.
Volumetric efficiency Volumetric efficiency Volumetric efficiency
Overall efficiency Overall efficiency Overall efficiency
Output Flow
Output Flow
Output Flow
Input PowerInput Power
Input Power
Eff
icie
ncy
60
40
20
0
Outp
ut
Flo
wL
/min
.
60
%
80
100
120
80
100
0 Inpu
t P
ow
er
40
80
kW
Pressure Kgf/cm²
0 50 100150200250300350
Eff
icie
ncy
60
40
20
0
60
%
80
100
120
80
100
0 Inpu
t P
ow
er
40
80
kW
Pressure Kgf/cm²
0 50 100150200250 300350
Eff
icie
ncy
60
40
20
0
60
%
80
100
120
80
100
0 Inpu
t P
ow
er
40
80
kW
Pressure Kgf/cm²
0 50 100150200250300350
120
Outp
ut
Flo
wL
/min
.
Outp
ut
Flo
wL
/min
.
140
N=1500 r/min. N=1800 r/min.
N=2500 r/min.
Inp
ut
Po
wer
70
60
50
40
30
20
10
0
kW
40 50 60
Output Flow L/min.70 80 90 100 110
Inp
ut
Po
wer
70
60
50
40
30
20
10
0
kW
40 50 60
Output Flow L/min.70 80 90 100 110
Inp
ut
Po
wer
70
60
50
40
30
20
10
0
Output Flow L/min.70 80 90 100 110
kW90
80
350 Kgf/cm²
300 Kgf/cm²280 Kgf/cm²250 Kgf/cm²
200 Kgf/cm²
150 Kgf/cm²
100 Kgf/cm²
50 Kgf/cm²
350 Kgf/cm²
300 Kgf/cm²280 Kgf/cm²250 Kgf/cm²
200 Kgf/cm²
150 Kgf/cm²
100 Kgf/cm²
50 Kgf/cm²
350 Kgf/cm²
300 Kgf/cm²280 Kgf/cm²
250 Kgf/cm²
200 Kgf/cm²
150 Kgf/cm²
100 Kgf/cm²
50 Kgf/cm²
120 130 140
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ Performance Characteristic Curve
Typical Performance Characteristics of “A3H71” Oil Viscosity 32 cSt [ISO VG 32, 400C]
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
280 Kgf/cm²
150 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
250 Kgf/cm²
kW
Inp
ut
Po
wer
50 70 90 110 130 150
Output Flow L/min.
kW
Inp
ut
Po
wer
50 70 90 110 130 150
Output Flow L/min.
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
280 Kgf/cm²
150 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
250 Kgf/cm²
350 Kgf/cm²
300 Kgf/cm²
280 Kgf/cm²
250 Kgf/cm²
200 Kgf/cm²
150 Kgf/cm²
100 Kgf/cm²
50 Kgf/cm²
60 80 100 120 140
kW
Inp
ut
Po
wer
Output Flow L/min.
N=1500 r/min. N=1800 r/min.
N=2300 r/min.
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0 0
20
40
60
80
100
120
160
■ Noise Level (dB): [One metre horizontally away from pump head cover]
■ Input Power
■ Full Cut-off Power ■ Drain
50 100 150 200 250 300 350
Full Cut-off Pressure Kgf/cm²
0
2
4
6
8
10
Fu
ll C
ut-
off
Po
wer
12
14
16
Pressure Kgf/cm²
L/min.
0
2
4
6
8
10
12
14
Dra
in
2300 r/min.
1800 r/min.
1500 r/min.
2300 r/min.1800 r/min.
1500 r/min.
2300 r/min.1800 r/min.1500 r/min.
kW
50 100 150 200 250 300 350
Full
Cut
-off
Full Flo
w
Note: The dotted line in the graph indicates less than minimum adjustable flow.
0 50 100 150 200 250 300 35050
60
70
80
90
dB(A)N=2300 r/min.
dB(A)N=1800 r/min.
dB(A)N=1500 r/min.
Full Flow
Full Cut-off
Pressure Pressure Pressure
No
ise
Lev
el
No
ise
Lev
el
No
ise
Lev
el
Full Flow
Full Cut-offFull Cut-off
Full Flow
Kgf/cm² Kgf/cm² Kgf/cm²
0 50 100 150 200 250 300 35050
60
70
80
90
0 50 100 150 200 250 300 35050
60
70
80
90
71
A
“A3H” Series High Pressure Variable
Displacement Piston Pumps
0 50 100150200250300350
N=1500 r/min. N=1800 r/min. N=2300 r/min.
Volumetric efficiency Volumetric efficiency Volumetric efficiency
Overall efficiency
Output Flow
Eff
icie
ncy
%100
80
60
110
100
90
80
0
Ou
tpu
t F
low L/m
in.
0
40
80
Eff
icie
ncy
%100
80
60
110
100
90
80
0
120
130
0
40
80
Eff
icie
ncy
%100
80
60
0
160
170
0
40
80
Inp
ut
Po
wer
kW
Pressure Kgf/cm² Pressure Kgf/cm² Pressure Kgf/cm²
120
130
140
150 100
0 50 100150200250300350 0 50 100150200250300350
Inp
ut
Po
wer
kW
Inp
ut
Po
wer
kW
Output FlowOutput Flow
Overall efficiencyOverall efficiency
Input Power
Input Power
Input P
ower
Ou
tpu
t F
low L/m
in.
Ou
tpu
t F
low L/m
in.
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ Performance Characteristic Curve
Typical Performance Characteristics of “A3H100” Oil Viscosity 32 cSt [ISO VG 32, 400C]
■ Noise Level (dB): [One metre horizontally away from pump head cover]
■ Input Power
■ Full Cut-off Power ■ Drain
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
280 Kgf/cm²
150 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
250 Kgf/cm²
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
280 Kgf/cm²
150 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
250 Kgf/cm²
kW
Inp
ut
Po
wer
0
20
40
60
80
100
120kW
Inp
ut
Po
wer
0
20
40
60
80
100
120
80 100 120 140 180 200160 80 100 120 140 180 200160 100 120 140 180 2001600
20
40
60
80
100
120
140kW
Inp
ut
Po
wer
Output Flow L/min. Output Flow L/min. Output Flow L/min.
N=1500 r/min. N=1800 r/min.
N=2100 r/min.
50 Kgf/cm²
100 Kgf/cm²
200 Kgf/cm²
280 Kgf/cm²
150 Kgf/cm²
300 Kgf/cm²
350 Kgf/cm²
250 Kgf/cm²
220
N=1500 r/min. N=1800 r/min. N=2100 r/min.
Nois
e L
evel
dB(A)
Pressure Kgf/cm²
500
60
70
80
50 100 150 200 250 300 350
90
Nois
e L
evel
dB(A)
Pressure Kgf/cm²
500
60
70
80
50 100 150 200 250 300 350
90
Nois
e L
evel
dB(A)
Pressure Kgf/cm²
500
60
70
80
50 100 150 200 250 300 350
90
Full Flow
Full Cut-off
Full FlowFull Flow
Full Cut-off Full Cut-off
Note: The dotted line in the graph indicates less than minimum adjustable flow.
72
N=1500 r/min. N=1800 r/min. N=2100 r/min.
Volumetric Efficiency Volumetric Efficiency Volumetric Efficiency
Overall Efficiency Overall Efficiency Overall Efficiency
Output Flow
Output Flow Output Flow
Input Power
Input P
ower
Input P
ower
Eff
icie
ncy
100
80
60
150
140
130
120
0
Eff
icie
ncy
100
80
60
170
160
150
140
0
Eff
icie
ncy
100
80
60
200
190
180
170
00
40
80
Input
Pow
er
kW
0
40
80
Input
Pow
er
kW
0
50
100
Input
Pow
er
kW
0 50 100150200250300350 0 50 100150200250300350 0 50 100150200250 300350
Pressure Kgf/cm² Pressure Kgf/cm² Pressure Kgf/cm²
160
190
180
220
210
100
120 150
Outp
ut
Flo
w L/m
in.
Outp
ut
Flo
w L/m
in.
Outp
ut
Flo
w L/m
in.
% % %
0
2
4
6
8
10
12
14
16
Fu
ll C
ut-
off
Po
wer
2100 r/min.
1800 r/min.
1500 r/min.
2100 r/min.
1800 r/min.1500 r/min.
1500,1800 r/min.2100 r/min.
50 100 150 200 250 300 3500
2
4
6
8
10
12
14
Dra
in
50 100 150 200 250 300 350
Full Cut-off Pressure Kgf/cm² Pressure Kgf/cm²
kW
L/min.
Full Cut-o
ff
Full Flow
“A3H” Series Variable Displacement Piston Pumps
N=1500 r/min. N=1800 r/min.
No
ise
Lev
el
dB(A)
60
70
80
90
0 50 100 150 200 250 300 350
No
ise
Lev
el
dB(A)
60
70
80
90
0 50 100 150 200 250 300 350
Full Cut-off
Full Flow Full Flow
Full Cut-off
Pressure
Kgf/cm²
Pressure
Kgf/cm²
PISTON PUMPS
Typical Performance Characteristics of “A3H145” Oil Viscosity 32 cSt [ISO VG 32, 400C]
■ Performance Characteristic Curve
■ Noise Level (dB): [One metre horizontally away from pump head cover]
■ Input Power
■ Full Cut-off Power ■ Drain
Note: The dotted line in the graph indicates less than minimum adjustable flow.
73
A
“A3H” Series High Pressure Variable
Displacement Piston Pumps
1800 r/min.
1500 r/min.
1800 r/min.
1800 r/min.
1500 r/min.
1500 r/min.
N=1500 r/min. N=1800 r/min.
Overall efficiency Overall efficiency
Input P
ower
Input P
ower
Volumetric efficiency Volumetric efficiency
Output Flow
Output FlowEff
icie
ncy
60
140
0
%
180
220
80
100
Eff
icie
ncy
60
%
80
100
Pressure
0 50 100150200250300350 0 50 100150200250300350
0
Inp
ut
Pow
er
kW
Inp
ut
Po
wer
kW
50
100
150
0
50
100
150
160
0
200
240
280
60 100 140Output Flow
180 220 260
300 Kgf/cm²
280 Kgf/cm²
250 Kgf/cm²
200 Kgf/cm²
150 Kgf/cm²
100 Kgf/cm²
50 Kgf/cm²
Inp
ut
Pow
er
140
120
100
80
60
40
20
0
kW
Inp
ut
Pow
er
140
120
100
80
60
40
200
kW180
160
80 120 160 200 240 280
N=1500 r/min.N=1800 r/min.
350 Kgf/cm²
300 Kgf/cm²
280 Kgf/cm²250 Kgf/cm²
200 Kgf/cm²
150 Kgf/cm²
100 Kgf/cm²
50 Kgf/cm²
350 Kgf/cm²
50 100 150 200 250 300 350
Full Cut-off Pressure
0
5
10
15
20
Full
Cu
t-o
ff P
ow
er
kW
0
5
10
15
20
Dra
in
L/min.
50 100 150 200 250 300 350
Full Cut-o
ff
Full Flow
Ou
tpu
t F
low L/m
in.
Ou
tpu
t F
low L/m
in.
Kgf/cm²
Pressure
Kgf/cm²
L/min.Output Flow
L/min.
Kgf/cm²
Pressure
Kgf/cm²
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
Typical Performance Characteristics of “A3H180” Oil Viscosity 32 cSt [ISO VG 32, 400C]
■ Performance Characteristic Curve
■ Noise Level (dB): [One meter horizontally away from pump head cover]
■ Input Power
■ Full Cut-off Power ■ Drain
Note: The dotted line in the graph indicates less than minimum adjustable flow.
74
Overall efficiency Overall efficiency
Input Power
Input P
ower
Volumetric efficiency Volumetric efficiency
Output Flow
Output Flow
Eff
icie
ncy
60
200
0
%
240
280
80
100
Eff
icie
ncy
60
%
80
100
220
0
260
300
340
Pressure Kgf/cm²
0 50 100150200250300350
Pressure Kgf/cm²
0 50 100150200250300350
0 Inp
ut
Po
wer
kW
80
160
0 Inp
ut
Po
wer
kW
80
160
240
N=1500 r/min. N=1800 r/min.
Outp
ut
Flo
w L/m
in.
Outp
ut
Flo
w L/m
in.
N=1500 r/min.N=1800 r/min.
N=1500 r/min. N=1800 r/min.
300 Kgf/cm²280 Kgf/cm²250 Kgf/cm²
200 Kgf/cm²
150 Kgf/cm²
100 Kgf/cm²
50 Kgf/cm²
350 Kgf/cm² 300 Kgf/cm²
280 Kgf/cm²
250 Kgf/cm²
200 Kgf/cm²
150 Kgf/cm²
100 Kgf/cm²
50 Kgf/cm²
350 Kgf/cm²
Inp
ut
Pow
er
120
80
40
0
kW
160
200
0 50 100Output Flow L/min.
150 200 250 300 50 100Output Flow L/min.
150 200 250 300
Inp
ut
Pow
er120
80
40
0
kW
160
200210
350
1800 r/min.
1500 r/min.
1500 r/min.
1800 r/min.
1800 r/min.1500 r/min.
0
4
8
12
16
Full
Cu
t-o
ff P
ow
er
kW
50 100 150 200 250 300 350
Full Cut-off Pressure Kgf/cm²
50 100 150 200 250 300 350
Pressure Kgf/cm²
0
10
20
Dra
in
L/min.
Full Cut-off
FUll Flow
20
No
ise
Lev
el
dB(A)
60
70
80
90
Pressure Kgf/cm²
0 50 100 150 200 250 300 350
Pressure Kgf/cm²
0 50 100 150 200 250 300 350
No
ise
Lev
el
dB(A)
60
70
80
90
Full Cut-off
Full FlowFull Flow
Full Cut-off
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
50.8
23.8
31.531.5
26.2
52.4
74.5 74.5
Discharge Port "P"
19 Dia.
M10 Thd. x 19 Deep
8 Places
Suction Port "S"
26 Dia.
Flow Adj. Screw13 Hex.
174.5
10
22.2
3
22.2
0D
ia.
25
.01
24
.85
10
1.6
0
10
1.5
5D
ia.
82
28
37
49.5
9.539
Fully Extended 205.5
10
9.5
81
Filling Port
22 Hex. Head
Plug Furnished
Dec.
Drain Port
Rc 12 Thd.
12628
89
.8
11
913.5
89.8
Pres. Adj. Screw13 Hex.
6.38
6.35
Inc.
165
100
22
41.544
152
120 120
288
16 18 1
15
14 Dia. x Thru.
28 Dia. Spotface
4 Places
View Arrow X
X
10
Position of
Drain Port
■ A3H16-FR01KK-10
■ A3H16-LR01KK-10
Flange Mounting
Foot Mounting
DIMENSIONS IN
MILLIMETRES
For other dimensions, refer to “Flange Mtg”.
*
* Install the pump so that the “filling port” is at the top.
75
A
“A3H” Series High Pressure Variable
Displacement Piston Pumps
57
.2
8281
58.7
30.2 27.8
35 35
Flow Adj.
Screw
17 Hex.
Dec.
M12 Thd. x 22 Deep
4 Places
Suction Port "S"
32 Dia.
Discharge Port "P"
24 Dia.
M10 Thd. x 18 Deep
4 Places
Drain Port
Rc 12 Thd.
189.5
12
90
114
Fully Extended 223
25
.40
25
.37
28
.18
28
.00
127
.00
126
.95
94
40
47.5
12.549
61.5
Filling Port
22 Hex. Head
Plug Furnished
Dia
.
Dia
.
150
28
114
.5
143
6.386.35
13.5
114.5
Position of
Drain PortPres. Adj. Screw
13 Hex.
INC.
X
View Arrow X
16.5
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ A3H37-FR01KK-10
■ A3H37-LR01KK-10
Flange Mounting
Foot Mounting
DIMENSIONS IN
MILLIMETRES
For other dimensions, refer to “Flange Mtg”.
*
100
150
66.5
39.5 278
1583
23
150
16
14 Dia. x Thru.
28 Dia. Spotface
4 Places
22
19
115 115
* Install the pump so that the “filling port” is at the top.
76
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ A3H56-FR01KK-10
■ A3H56-LR01KK-10
Flange Mounting
Foot Mounting
57.2
38 38
35.7 27.8
92 89
69
.9
Suction Port "S"
38 Dia.
M12 Thd. x 22 Deep
8 Places
Discharge Port "P"
26 Dia.
Flow Adj. Screw 17 Hex.
Dec.
154
28
14
3
114
.5
13.5
Position of
Drain Port
114.5
Pres. Adj. Screw13 Hex.
INC.
7.977.94
206
13
31
.75
31
.70
35.3
235
.14
127
.00
12
6.9
5
10
7
Dia
.
Fully Extended 239
40
47.5
12.546.5
62
Drain Port
Rc 3/4 Thd.
Filling Port
22 Hex. Head
Plug Furnished
125
10
2
Dia
.
X
View Arrow X
19
DIMENSIONS IN
MILLIMETRES
For other dimensions, refer to “Flange Mtg”.
100
150
67
40
1916
22
278
3
23 1
50
14 Dia. x Thru.
28 Dia. Spotface
4 Places
115 115
158
*
* Install the pump so that the “filling port” is at the top.
77
A
“A3H” Series High Pressure Variable
Displacement Piston Pumps
66
.7
41.5 41.5
42.9 31.8
77.8
106.5 97
M12 Thd. x 19 Deep
8 Places
Flow Adj. Screw 17 Hex.
Suction Port "S"
51 Dia.
Discharge Port "P"
34 Dia.
Dec.
229.5
14
11
41
40
Fully Extended 264
38.1
03
8.0
5
42.3
642
.18
127.0
012
6.9
5
11
7
50
60.5
12.555
75
Drain Port
Rc 3 4 Thd.
Filling Port
22 Hex. Head
Plug Furnished
Dia
.
Dia
.
28
14
3
11
4.5
13.5
154
Position of
Drain PortPres. Adj. Screw13 Hex.
INC.9.569.53
114.5
150
100 80
53
19
16
278
1583
23
150
14 Dia. x Thru.
28 Dia. Spotface
4 Places
22
X
View Arrow X
Case Drain Port5 Hex. Soc.
19
115 115
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ A3H71-FR01KK-10
■ A3H71-LR01KK-10
Flange Mounting
Foot Mounting
DIMENSIONS IN
MILLIMETRES
For other dimensions, refer to “Flange Mtg”.
*
* Install the pump so that the “filling port” is at the top.
78
31.850.8
45 45
66.7
88.9
112 103
Suction Port "S"
63 Dia.
M12 Thd. x 19 Deep
8 Places
Flow Adj. Screw 17 Hex.
Dec.
249.517
11
8.5
144
44
.45
44.4
0
49.3
9
49
.21
15
2.4
0
152.3
5
12
9.5
63
81
95
12.560
Fully Extended 284.5
Filling Port
27 Hex. Head
Plug Furnished
Drain Port
Rc 3 4 Thd.
Dia
.
Dia
.
39
196
161.6
21.5
161.6
210
Position of
Drain Port
11.1411.11
Pres. Adj. Screw13 Hex.
INC.
37
210
398
198
3
32
220
140 108
63
3229
22 Dia. x Thru.
43 Dia. Spotface
4 Places
Discharge Port "P"
34 Dia.
X
View Arrow X
Case Drain Port
5 Hex. Soc.
23
165 165
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ A3H100-FR01KK-10
■ A3H100-LR01KK-10
Flange Mounting
Foot Mounting
DIMENSIONS IN
MILLIMETRES
For other dimensions, refer to “Flange Mtg”.
*
* Install the pump so that the “filling port” is at the top.
79
A
“A3H” Series High Pressure Variable
Displacement Piston Pumps
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ A3H145-FR01KK-10
■ A3H145-LR01KK-10
Flange Mounting
Foot Mounting
DIMENSIONS IN
MILLIMETRES
For other dimensions, refer to “Flange Mtg”.
*
* Install the pump so that the “filling port” is at the top.
80
Discharge Port "P"
34 Dia.
31.850.8
4949
88
.9
66
.7
121 111
Flow Adj. Screw
19 Hex.Dec.
Suction Port "S"
63 Dia.
M12 Thd. x 22 Deep
8 Places
54
.45
44.4
0
49
.39
49.2
1
15
2.4
01
52.3
5
139
Dia
.
Dia
.
283.5
63
81
95
12.574
Fully Extended 321.5
12
915
2
Filling Port
27 Hex. Head
Plug Furnished
Drain Port
Rc 3 4 Thd.
16
1.6
200
39
220
21.5
161.6Position of
Drain Port
12.73
12.70
Pres. Adj. Screw13 Hex.
22
Inc.
X
View Arrow X
Case Drain Port
5 Hex. Soc.
26
198
29
32
140
270
200 48
13
32
398
212 37 2
10
22 Dia. x Thru.
43 Dia. Spotface
4 Places
3
165 165
123 123
“A3H” Series Variable Displacement Piston Pumps
PISTON PUMPS
■ A3H180-FR01KK-10
■ A3H180-LR01KK-10
Flange Mounting
Foot Mounting
DIMENSIONS IN
MILLIMETRES
For other dimensions, refer to “Flange Mtg”.
*
* Install the pump so that the “filling port” is at the top.
81
A
“A3H” Series High Pressure Variable
Displacement Piston Pumps
36.5
53 53
61.9
10
6.4
79.4
129.5 117Position of
Drain Port
M12 Thd. x 29 Deep
8 Places
Suction Port "S"
76 Dia.
Flow Adj. Screw
19 Hex.Dec.
Discharge Port "P"
44 Dia.
309.5
24
152
.40
152
.35
50.8
05
0.7
5
56
.43
56.2
5
Dia
.
Dia
.
148
.5
160
13
8
80
12.581
Fully Extended 347.5 112
97.5
Drain Port
Rc 3 4 Thd.
Filling Port
27 Hex. Head
Plug Furnished
20
0
16
1.6
220
39
21.5
161.6Pres. Adj. Screw
13 Hex.INC.
12.7312.70
3
198
270
200 65
30
32
140
29
32
398
165
212 37 2
10
22 Dia. x Thru.
43 Dia. Spotface
4 Places
X
View Arrow X
Case Drain Port
5 Hex. Soc.
27.5
123 123
165
“A3H” Series Variable Displacement Piston Pumps
Sl.
No. Name of Parts
Part Numbers Qty.
A3H16 A3H37 A3H56
1 Gasket 2270-PK313655-3 2271-PK313518-3 2272-PK313433-5 1
2 Back Up Ring 1310E-PK412440-0 1
3 Oil Seal TCN254511 (FKM) TCN284811 (FKM) TCN355511 (FKM) 1
4 O-Ring S65 (NBR, Hs70) S85(NBR,Hs70) S95(NBR,Hs70) 1
5 O-Ring SO-NA-G60 SO-NA-G60 S71(NBR,Hs70) 1
6 O-Ring S0-NB-P14 S0-NB-P18 S0-NB-P21 1
7 O-Ring S0-NB-P14 1
8 O-Ring S0-NB-P9 4
9 O-Ring S0-NB-P6 S0-NB-P8 S0-NB-P9 1
10 O-Ring SO-NA-A018 1
11 O-Ring SO-NB-P26 1
■ Spare Parts List
List of Seals
Note: When ordering seals, please specify the seal kit number from the table below.
List of Seal Kit
Model Number Seal Kit Numbers
A3H16-※R01KK-10 KS-A3H16-01-10
A3H37-※R01KK-10 KS-A3H37-01-10
A3H56-※R01KK-10 KS-A3H56-01-10
Sl. No.
Name of Parts Part Numbers
Qty. A3H71 A3H100 A3H145 A3H180
1 Gasket 2273-PK212356-0 2274-PK212368-5 2275-PK212382-6 2276-PK212301-6 1
2 Back Up Ring 1310E-PK412440-0 1
3 Oil Seal TCN426512(FKM) TCN507212(FKM) TCN557812(FKM) 1
4 O-Ring S100 (NBR, Hs70) S110 (NRB, Hs70) S125 (NBR, Hs70) S130 (NBR, Hs70) 1
5 O-Ring SO-NA-G80 SO-NA-G95 SO-NA-G95 SO-NA-G105 1
6 O-Ring SO-NB-P24 SO-NB-P26 1
7 O-Ring SO-NB-P14 SO-NB-P18 SO-NB-P18 1
8 O-Ring SO-NB-P9 SO-NB-P10A 1
9 O-Ring SO-NB-P9 4
10 O-Ring SO-NA-A021 1
11 O-Ring SO-NB-P32 1
Note: When ordering seals, please specify the seal kit number from the table below.
List of Seal Kit
Model Number Seal Kit Numbers
A3H71-※R01KK-10 KS-A3H71-01-10
A3H100-※R01KK-10 KS-A3H100-01-10
A3H145-※R01KK-10 KS-A3H145-01-10
A3H180-※R01KK-10 KS-A3H180-01-10
PISTON PUMPS
82
Pipe flange kits are available. When ordering, specify kit number from the table below.
■ Pipe Flange Kits.
Pump Model Numbers
Port Name
Pipe Flange Kit Numbers. *1
Threaded Connection Socket Welding
A3H16-※R01 Suction F5-08-A-10 F5-08-B-10
Discharge F6-06-A-M-10 *2
F6-06-B-M-10
A3H37-※R01 Suction F5-10-A-10 F5-10-B-10
Discharge F6-08-A-M-10 *2
F6-08-B-M-10
A3H56-※R01 Suction F5-12-A-10 F5-12-B-10
Discharge F6-08-A-M-10 *2
F6-08-B-M-10
A3H71-※R01 Suction F5-16-A-10 F5-16-B-10
Discharge F6-10-A-M-10 *2
F6-10-B-M-10
A3H100-※R01
A3H145-※R01
Suction F5-20-A-10 F5-20-B-10
Discharge F6-10-A-M-10 *2
F6-10-B-M-10
A3H180-※R01 Suction F5-24-A-10 F5-24-B-10
Discharge F6-12-A-M-10 *2
F6-12-B-M-10
*1 Details of pipe flange kits are described in EIC-L-1001.
*2 These flanges are with tapered threaded port, maximum pressure is restricted at 310 Kgf/cm².