Introduction
420 Series Mobile Piston Pump
Eaton’s 420 Series mobile pumps are open circuit,
axial piston designs with displacements of 41cc, 49cc,
62cc, and 80cc for operating speeds up to 2,650 rpm.
They are available with a variety of control options to
match their performance to a broad range of mobile
applications.
The highly efficient pump controls reduce cooling
system requirements, allowing a smaller and less
expensive design to be used. Or, cooling capacity can
be kept the same and the flow capability of the system
increased to improve performance.
A strong, field-proven rotating group allows the
pumps to handle pressures to 280 bar (4000 psi)
continuous and 320 bar (4600 psi) intermittent – with
less maintenance cost. 420 Series pumps use a saddletype swashplate with steel-backed polymer bearings
and a pressure lubrication passage to reduce wear and
support internal loads.
The swashplate is very stiff, which reduces deflection
and allows even loading of the bearings to extend
the unit’s service life. The combination of high load
capacity bearings and a stiff drive shaft help provide
a pump B10 bearing life of 3320 hours at rated mobile
conditions, reducing operating costs and extending
operating life.
A single control piston is used to vary pump output.
This design reduces the forces acting on the
swashplate, resulting in reduced package size, which
allows pump installation into tighter locations.
In response to customer expectations and regulatory
requirements, Eaton has designed the 420 Series
pumps to operate at very low noise levels. A
bimetal timing plate is used to improve pump filling
characteristics which further reduces fluid-borne noise
and extends pump life.
Both SAE and ISO mounting flange configurations are
available as well as SAE and ISO tube- and flangetype ports. Side- or end-ported models are available to
facilitate plumbing and help fit the pump to machine
space needs, as are multiple drain ports to allow many
mounting orientations.
Typical Applications
Features and Benefits
•Loader backhoes
•Long pump life
•Vibratory cable plows
•Quiet pump operation
•Mining machinery
•Low installed and
•Dump truck lifts
•Agriculture tractors
•Chemical applicator trucks
•Railroad equipment
•Container handling, all-terrain,
and truck cranes
•Vibratory cable plows
•Mining machinery and tunnel
boring equipment
•Utility boom, off-road dump,
and refuse trucks
•Material handling trucks and
rough terrain fork lifts
•Concrete and asphalt pavers
•Feller/bunchers, forwarders,
and log loaders
•Crawler dozers
•Articulate haulers
•Mini-excavators
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EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
operating costs
•Reduced maintenance
•Flexibility in machine design
•Compact size saves space
•Design promotes leak-free
system
Table of Contents
Model Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications and Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Control Options
Load Sense and Pressure Compensator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pressure Compensator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Torque Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
EH Inverse Proportional Pressure Control (IPPC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Remote Pressure Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Cold Start Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Performance
ADU041 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
ADU049 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ADU062 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ADU080 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Pump Installation
B-mount – Rear-ported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
B-mount – Side-ported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
C-mount – Rear-ported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
C-mount – Side-ported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Thru-Drive SAE A Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Thru-Drive SAE B Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Dual Shaft Seal Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Control Installation
Load Sense and Pressure Compensator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Pressure Compensator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Torque Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
EH Inverse Proportional Pressure Control (IPPC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Cold Start Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
External Manual Stroke Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Input Shaft Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Center of Gravity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Installation and Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
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EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Model Codes
420 Mobile Piston Pump
A D U 0 6 2 R 0 8 A B 1 0 A 43 14 00 0A 1 AB 1 00 CD 0 B
1 2 3
4 5 6
7
Pump Series
ADU – 4
20 Series Open
Circuit Piston Pump
1 2 3
4 5 6 Pump Displacement
041 – 41.0 cm3/r [2.50 in3/r]
049 – 49.2 cm3/r [3.00 in3/r]
062 – 62.3 cm3/r [3.80 in3/r]
080 – 80.0 cm3/r [4.88 in3/r]
Input Shaft Rotation
R – Right Hand
L – Left Hand
7
Front Mount and Shaft
01 – 2
Bolt B, 22.2 mm
(0.875in.) Dia. Keyed Shaft
02 – 2
Bolt B, 25.4 mm
(1.00in.) Dia. Keyed Shaft
03 – 2 Bolt B, 22.22 mm
(.875in.) Dia. Tapered
Keyed Shaft
05 – 2 Bolt B, 13 Tooth 16/32
Spline
08 – 2 Bolt B,15 Tooth 16/32
8 9
Spline
32 – 2/4 Bolt C, 14 Tooth 12/24
Spline
33 – 2/4 Bolt C, 31.8 mm
(1.25in) Dia. Keyed Shaft
34 – 2 Bolt B, 15 Tooth 16/32
Sled Runner Spline
35 – 2 Bolt B, 14 Tooth 12/24
Spline
38 – 2/4 Bolt C, 31.75 mm
(1.25) Dia. Tapered Keyed
Shaft
8 9
10 11
12
13
14
15 16
Main Ports Size
& Location
AA – R
ear Ports
Suction - 2” (Code 61);
Pressure - 1” (Code 61)
AB – S
ide Ports
Suction - 2” (Code 61);
Pressure - 1” (Code 61)
AC – Rear Ports
Suction - 2” (Code 61)
with M12 Threads;
Pressure - 1” (Code 61)
with M10 Threads.
AD – Side Ports
Suction - 2” (Code 61)
with M12 Threads;
Pressure - 1” (Code 61)
with M10 Threads.
AE – Rear Ports
Suction - SAE O-Ring
Port; Pressure - UN-2B
SAE O-Ring Port (ADU041
10 11
& ADU049 only)
17 18 19 20 21 22
24 25
12 Case Drain Ports
1 – #12 SAE O-Ring - Top
2 – #12
SAE O-Ring - Bottom
3–M
27 x 2 O-Ring - Top
4–M
27 O-Ring - Bottom
5 – #12
SAE O-Ring - Left Side
(Swash Sensor Boss)
6–G
3/4 (BSPP) - Top
iagnostic Pressure Ports
D
Not available on thru-drive
units
0–N
o Diagnostic Pressure
Ports
1–#
6 SAE O-Ring - Plugged
13
(Rear Ports Only)
2–M
14 Metric O-Ring Plugged (Rear Ports Only)
3–#
4 SAE O-Ring - Plugged
(Side Ports Only)
4 – M12
Metric O-Ring Plugged (Side Ports Only)
AF – Side Ports
Suction - #24 SAE O-Ring;
Pressure - #16 SAE
O-Ring (ADU041 and
ADU049 Only)
AG – Rear Ports
Suction - M48
Metric O-Ring;
Pressure - M33
Metric O-Ring
(ADU041 & ADU049 Only)
AH – Side Ports
Suction - M48
Metric O-Ring;
Pressure - M33
Metric O-Ring
(ADU041 & ADU049 Only)
AK – Rear Ports
Suction - 2” (Code 61);
Pressure - #16 SAE
O-Ring (ADU062 Only)
4
23
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
26
27 28
29 30
31
32
Controller Type
A–P
ressure Flow
Compensator With
#4 SAE O-Ring
Load Sense Port
B–P
ressure Flow
Compensator With
M12 Metric O-Ring
Load Sense Port
C–P
ressure Compensator
Only
E–P
ressure Flow
Compensator With
G 1/4 (BSPP) Load Sense
Port
H–P
ressure Flow
Compensator With
Torque Control #4 SAE
O-Ring Load Sense Port
J–P
ressure Flow
Compensator With Torque
Control M12 Metric O-Ring
Load Sense Port
K–P
ressure Compensator
With Torque Control
V – EH Inverse Proportional
Pressure Control
W – Remote Pressure Control
with .4375-20 SAE O-Ring
Port, Left Side#
14
Pressure Compensator
Setting (Tolerance on
Setting)*
28 – 2
07-214 bar
[3000-3100 lbf/in2]
35 – 2
41-248 bar
[3500-3600 lbf/in2]
43 – 276-283 bar
[4000-4100 lbf/in2]
15 16
* Additional Settings Available by
Request
# - Recommend RPC pressure settings
10-21 bar (140-350 psi)
Model Codes
420 Mobile Piston Pump
A D U 0 6 2 R 0 8 A B 1 0 A 43 14 00 0A 1 AB 1 00 CD 0 B
1 2 3
4 5 6
Flow Compensator /
Remote Pressure
Control Setting*
00 – N
o Flow Compensator
Setting
14 – 1
2-15 bar
[180-220 lbf/in2]
24 – 2
3-26 bar
[330-370 lbf/in2]
17 18
Torque Control
Setting
00 – N
o Torque Control
AA – 4
0 Nm [350 in-lbs]
(41,49)
AB – 5
1 Nm [450 in-lbs]
(41,49)
AC – 6
2 Nm [550 in-lbs]
(41,49,62)
AD – 7
3 Nm [650 in-lbs]
(41,49,62,80)
AE – 8
5 Nm [750 in-lbs]
(41,49,62,80)
AF – 96 Nm [850 in-lbs]
(41,49,62,80)
AG – 107 Nm [950 in-lbs]
(41,49,62,80)
AH – 1
19 Nm [1050 in-lbs]
(49,62,80)
AJ – 1
30 Nm [1150 in-lbs]
(49,62,80)
AK – 1
41 Nm [1250 in-lbs]
(49,62,80)
AL – 153 Nm [1350 in-lbs]
(62,80)
AM – 1
64 Nm [1450 in-lbs]
(62,80)
AN – 175 Nm [1550 in-lbs]
(62,80)
AP – 186 Nm [1650 in-lbs]
(62,80)
AR – 198 Nm [1750 in-lbs]
(62,80)
AT – 209 Nm [1850 in-lbs]
(62,80)
AU – 220 Nm [1950 in-lbs]
(80)
19 20
5
7
8 9
10 11
12
13
14
15 16
17 18 19 20 21 22
23
24 25
26
Control Special
Features
00 – Control Special Features
0A – B
leed Down Orifice
0D – 12V Cold Start Valve
0S – 12V DC Solenoid AMP Jr
Connector
0T – 24V DC Solenoid AMP Jr
Connector
0U – 12V DC Solenoid
Deutsch Connector
0V – 24V DC Solenoid
Deutsch Connector
Auxiliary (Rear) Mount
& Output Shaft
00 – N
o Auxiliary Mounting
Features
AB – S
AE A 2 Bolt,
11T 16/32 Spline
AC – S
AE B 2 Bolt,
13T 16/32 Spline
AD – S
AE B 2 Bolt,
15T 16/32 Spline
AE – SAE A 2 Bolt,
9T 16/32 Spline
aximum Displacement
M
Option*
1–S
tandard Displacement
(As Given In Code Title)
2–E
xternal Manual
Stroke Adjustment
0 – No Shaft Seal
1–S
tandard Polyacrylate
Shaft Seal
2–V
iton
Shaft Seal
3†– Double, Two-Way Shaft
Seal, Viton With VHO Filter
4 – Nitrile Shaft Seal
5–S
ingle Viton Shaft Seal in
2/4 Bolt C Mount Pump
Housing
21 22
23
24 25
26
Shaft Seal
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
27 28
29 30
31
32
27 28 Pump Special Features
00 – No Special Features
AA – A
uxiliary Mounting
Cover Plate
AB – Swash Position Sensor
AC – Shaft Speed Sensor
AD – M
odified End Cover,
Corner Removed
AE – S
upport Studs (1/2-13
UNC-2B x 117.8 (4.64)
Long in Top Two End
Cover/Housing Bolt
Locations
AG – S
wash Position Sensor
and Shaft Speed Sensor
29 30 Paint
00 – No Paint
CD – Blue Primer
31
Identification/Packaging
0–S
tandard Eaton
Identification Box
Packaging
32 Design Level
B – Second Design
* Additional Settings Available by
Request
† Not available on SAE B mount
Specifications and
Performance
General Performance Specifications
Units
ADU041 ADU049 ADU062ADU080
Displacement
cc/r (in3/r)
41.0 (2.50)
49.2 (3.00)
62.3 (3.80)
80.0 (4.88)
Weight
Single Seal1
kg (lbm)
22.9 (50.4)
22.9 (50.4)
23.8 (52.4)
24.2 (53.4)
Dual Seal1
24.1 (53.1)
24.1 (53.1)
25.0 (55.1)
25.4 (56.1)
PressureContinuous
bar (psi)
280 (4060)
280 (4060)
280 (4060)
210 (3050)
Intermittent2
320 (4600)
320 (4600)
320 (4600)
230 (3335)
Peak3
350 (5000)
350 (5000)
350 (5000)
250 (3625)
Speed4
At 1 bar abs (0 psig)
rpm
2650 2650 26002200
At .85 bar abs (5 in.Hg)
2450
2450
2400
1800
At 2 bar abs (15 psig)
2950
2950
2800
N/A
Max (standby)
3600
3600
3600
3600
Min
600 600 600600
Power
Max (theoretical)
kW (hp)
50.7 (68.0)
60.8 (81.5)
75.6 (101.3)
61.7 (82.7)
Standby
.98 (1.3)
.98 (1.3)
1.1 (1.5)
1.4 (1.9)
Torque
Max (theoretical)
Nm (lb-ft)
183 (135)
219 (162)
278 (205)
268 (198)
Bearing Life5
At 140 bar (2030 psi)
B10 Hours103,650 55,580 33,500 17,150
At 210 bar (3045 psi)
26,830
14,380
8,670
4,440
At 280 bar (4060 psi)
10,280
5,510
3,320
N/A
Mass Moment of Inertia
Nm-sec2
.0033 .0033
.0046
.0058
(lb-in-sec2)(.0288) (.0288) (.0403) (.0517)
1 Standard SAE B non-through drive.
2 Less than 10% of duty cycle.
3 Momentary system pressure spikes only.
4 Ratings based on Flange ports. Note: Tube ports are not available on the 62cc and 80cc displacements.
5 Bearing life ratings at rated speed - 1 bar abs (0 psig) inlet.
Inlet Pressure, Case Pressure, and Operating Temperature Requirements
Inlet Pressure Case Pressure Operating Temperature
Maximum Maximum Minimum Maximum
RatedMinimum
Maximum
Continuous
Intermittent
Peak RatedTemperature
Intermittent
bar abs (psig) bar abs (in. Hg) bar abs (psig) bar abs (psig) bar abs (psig) bar abs (psig) °C (°F)
°C (°F)
°C (°F)
1.0 (0)
0.85 (5)
4.4 (50)
1.3 (5)
3.1 (30)
6.2 (75)
93 (200)
-37 (-35)
104 (220)
Hydraulic Fluids
Fluid
Recommended
Operating Maximum Viscosity Range
Continuous
cSt (SUS)
cSt (SUS)
Use antiwear hydraulic oil,
16 to 40 (80 to 188)
or automotive type crankcase
oil (designations SC, SD, SE
or SF) per SAE J183 FEB80
430 (1192)
Maximum Viscosity
at Startup
cSt (SUS)
Minimum Viscosity @ Max.
Intermittent Temperature of
93°C (200°F)
cSt (SUS)
Minimum
Intermittent
cSt (SUS)
2100 (9720)
10 (59)
6 (46)
For more information, see Eaton publication 579. For operation on other alternative or environmentally friendly fluids, please contact your Eaton Representative.
6
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Control Options
Load Sense and Pressure
Compensator
7
Pressure Limit Settings
Optional bleed-down orifice in
Code A or B with control special feaure "A".
ø 0,4 mm (.015 in.). Orifice is plugged for
no bleed down in control Code A or B.
The pressure compensator
uses two springs to cover
the full pressure range of
the ADU pumps. The high
“F” case
pressure spring covers the
drain
range from 140 bar (2050
psi) to 280 bar (4060 psi).
The low pressure spring
“K” inlet �
is adjustable from minimum gage port
pressure through 140 bar
(optional)
(2050 psi).
Flow Compensator
(Load Sense) Settings
“B” inlet
“J” load
sense
signal
port
“K”outlet
gage port
(optional) �
“C” outlet
There are three springs
used to cover the load
sense adjustment range
of this control.
To load
Code A & B - Page 7
Code C - Page 8
Typical Operating Curve
Q
Q
Outlet Flow
Outlet Flow
Load Sense and Pressure
Compensator Control
The pump will provide power
matching of pump output to
system load demand, maximizing efficiency and improving load metering characteristics of any directional control
valve installed between the
pump and the load.
Load sensing ensures that
the pump always provides
only the amount of flow
needed by the load. At the
same time, the pump operating pressure adjusts to the
actual load pressure plus a
pressure differential required
for the control action. When
the system is not demanding
power, the load sense control
will operate in an energysaving stand-by mode.
Typically, the differential
pressure is that between the
pressure inlet and service
port of a proportionally
controlled directional valve,
or a load sensing directional
control valve. See the model
code on page 4 for differential pressure settings for load
sensing.
If the load pressure exceeds
the system pressure setting,
the pressure compensator
de-strokes the pump. The
load sensing line must be
as short as possible and can
also be used for remote control or unloading of the pump
pressure. For remote control
purposes, it is recommended
that you contact your Eaton
Representative for the correct configuration of the
control.
Warning: The pressure com­
pensator may be adjusted
beyond the rated pressure of
the pump. When adjusting
the pressure limiter, install a
0-350 bar (0-5000 psi) gage
in the outlet gage port and
limit the pressure setting to
the continuous rated pressure for the pump displacement shown on page 6.
Outlet Pressure
P
Outlet Pressure
Dynamic Response per SAE J745 (Using Swash Plate Position)
Response
RecoveryLoad Sense
(off stroke)
(on stroke) Recovery
msec
msec
msec
ADU041
20
75
ADU049
20
75
90
ADU062
25
90
115
ADU080
26
75
115
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
90
Control Options
Pressure Compensator
Pressure Compensator
Control
See Model Code on Page 4 for
Spring (Pressure) Adjustment Ranges.
The pump will provide a con­
tinuously modulated flow to
meet changing load demands
at a pre-adjusted compensator pressure. At pressures
below the compensator setting, the pump will operate
at maximum displacement.
See model code on page 4
for compensator pressure
ranges.
“B” Inlet
“F” Case Drain
+
“K” Inlet
Gage Port
Warning: The pressure compensator may be adjusted
beyond the rated pressure
of the pump. When adjusting
the pressure limiter, install a
0-350 bar (0-5000 psi) gage
in the outlet gage port and
limit the pressure setting to
the continuous rated pressure for the pump displacement shown on page 6.
+
“K” Outlet
Gage Port
“C” Outlet
To Load
Code A & B - Page 7
Code C - Page 8
Pressure Limit Settings
Outlet Pressure
P
Outlet Pressure
P
Q
Outlet Flow
Outlet Flow
Outlet Flow
Q
The pressure compensator
uses two springs to cover
Pressure Cut-off
Characteristics of
the full pressure
of
Change range
in
Pressure Compensathe ADU pumps.
The
high
Pressure A
tor Control
Q covers the
pressure spring
range from 140 bar (2050 psi) at 49°C (120°F),
static conditions.
to 280 bar (4060 psi). The low
Change
pressure spring is adjustablein Flow B
from minimum pressure
through 140 bar (2050 psi).
Outlet Pressure
P
Dynamic Response per SAE J745 (Using Swash Plate Position)
Response
Recovery
(off stroke)
(on stroke)
msec
msec
8
ADU041
20
75
ADU049
20
75
ADU062
25
90
ADU080
26
75
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Control Options
Torque Control
Torque Control
The 420 Torque Control limits the power input to the pump
preventing the engine from stalling while also optimizing the
use of the engine power.
“B” Inlet
“F” Case
Drain
See Page 7 for Pressure Compensator
Control and Load Sense
When combined with Pressure Compensator Control and/or
Load Sense (refer to page 7) it will allow the 420 to remain
inside the power envelope of the Pressure Flow curve.
When the combination of pump flow and outlet pressure
moves outside the envelope, the pump displacement will
automatically be reduced.
“J” Load
Sense
Signal Port
This maximum setting is easily calculated using the
following steps:
1.Select the 420 pump displacement you intend to use
“C” Outlet
To Load
2.Identify the available engine horsepower (HP) and speed (rpm)
3.Calculate the torque limit required by the system using the
equations shown
4.Select the MAX torque setting from the table shown
Torque =
Horsepower (HP) x 63025
(in-lbs) Engine RPM
Code Torque Setting Torque = Horsepower (KW) x 9550
(Nm)
41cc 49cc 62cc 80cc
Engine RPM
AA 40 Nm (350 in-lbs)


—
—
AB 51 Nm (450 in-lbs)


—
—
AC 62 Nm (550 in-lbs)



—
AD 73 Nm (650 in-lbs)




AE 85 Nm (750 in-lbs) 



AF 96 Nm (850 in-lbs) 



AG* 107 Nm (950 in-lbs) 



AH 119 Nm (1050 in-lbs) —



AJ 130 Nm (1150 in-lbs) — 


AK 141 Nm (1250 in-lbs) — 


AL 153 Nm (1350 in-lbs) — —  
3000
AM 164 Nm (1450 in-lbs) —
— 

2500
AN 175 Nm (1550 in-lbs) — —  
AP 186 Nm (1650 in-lbs) — —  
AR 198 Nm (1750 in-lbs) — —  
AT* 209 Nm (1850 in-lbs) —

AU 220 Nm (1950 in-lbs)
* reference 62cc
—
—



50
Flow (GPM)
40
Pressure
Limit
Setting
30
20
35%
75%
10
0
0
1000
2000
4000
Torque Curve*
35%
75%
without Torque Control
2000
with Torque Control
62cc AT
1500
with Torque Control
1000
62cc AG
500
0
0
1000
2000
Pressure (PSI)
9
3000
Pressure (PSI)
Torque (lbf-in)
—
Full Flow Pressure for
Torque Limit Setting
Power Curve*
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
3000
4000
Control Options
EH Inverse Proportional
Pressure Control (IPPC)
EH Inverse Proportional
Pressure Control (IPPC)
The EH Inverse Proportional
Pressure control allows for
stepless variation of the max
pump output pressure, as per
the current signal provided to
the control valve solenoid.
The integrated pump control
makes use of an external
current signal to vary the
pump output pressure.
This control has an inverse
proportional characteristic
i.e. with increasing current signal, the max output
pressure is proportionately
reduced.
Typ. Current vs Pressure
Characteristics of IPPC at
1800 rpm at various max
pressure settings at 49
deg C (120deg F), static
conditions.
300
250
200
Pressure (bar)
Warning: The pressure setting may be adjusted beyond
the rated pressure of the
pump. When adjusting the
pressure, install a 0-350
bar (0-5000 psi) gage in the
outlet gage port and limit
the pressure setting to the
continuous rated pressure
for the pump displacement
shown on page 6.
Pressure Limit Settings
The EH IPPC covers
pressure range of the ADU
pumps. The max pressure
can be set from 140 bar
(2050 psi) to 280 bar (4060
psi).
10
150
100
50
0
0
100
200
300
400
Current (mA)
500
600
700
800
ELECTRICAL DATA
Voltage
12 V
Max Current
1500 mA
R20, Resistance(ohm)
5.3 +/- 5%
Type of Control
Current
Current
Recommended
PWM Control
Frequency
100 Hz
100 Hz
Duty Cycle
100%
100%
Insulation material Class H, 180 deg C
Protection Class
IP6K6/IPX9K
Connector
AMP Junior Power Timer/ Deutsch Connector DT04-2P
AMP Junior Power
Timer/ Deutsch
Connector DT04-2P
Operating Temperature
-30 deg C; 105 deg C
-30 deg C; 105 deg C
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
24 V
750 mA
21.2 +/- 5%
Class H, 180 deg C
IP6K6/IPX9K
Control Options
Remote Pressure Control
Remote Pressure Control
Remote relief valve is to be
connected to pilot port “J”
through necessary external
piping. Standard differential
pressure of 20 bar is set
at RPC spool. The required
outlet pressure (below 280
bar) can be set by adjusting
remote relief valve setting.
Once pressure reaches preset value, flow across remote
relief valve starts, this results
in RPC spool movement due
to pressure imbalance. This
will de-stroke the pump to
maintain the set pressure.
Secondary pressure compensator is provided to limit the
max pressure setting as a fail
safe measure. The delta pressure is factory set which can
not be changed.
* Flow Compensator is not
available with RPC.
* Flow Compensator/
Remote Pressure Control
setting should be selected
within range of 10-24 bar
(140-350 psi).
* Remote relief valve is not
included in supply scope of
the pump.
11
Delta Pressure setting at control valve - bar (psi)
Control fluid consumption - lpm (gpm)
14 - 24 (200 - 350)
4.5 (1.2) max.
Recommended flow rating of remote relief valve- lpm (gpm)
3 – 5 (0.8 – 1.32)
Recommended Eaton Relief Valve part number
RV5-10-S-0-50
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Control Options
Cold Start Valve
Cold Start Valve
The 420 Cold Start Valve
reduces pump start-up
torque by directing control
pressure to the outlet.
It is primarily used in cold
weather applications and
includes a 12 or 24 VDC
directional control valve
mounted between the pump
housing and compensator.
“F” Case
Drain
“B” Inlet
Optional Bleed-down Orifice in
Code A or B with Control Special Feature "A".
Ø 0,4 mm (.015 In.). Orifice is Plugged for No
Bleed Down in Control Code A or B.
“K” Inlet
Gage Port
(Optional)
“J” Load Sense
Signal Port
“K” Inlet
Gage Port
(Optional)
“C” Outlet
To Load
12
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Performance
ADU041
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
90
88
150 bar (2200 psi)
200 bar (2900 psi)
Efficiency (%)
86
250 bar (3600 psi)
84
280 bar (4000 psi)
82
80
78
76
74
500
1000
1500
2000
2500
3000
Input Speed, rpm
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
90
88
103 bar (1500 psi)
86
Efficiency (%)
84
68 bar (1000 psi)
82
50 bar (700 psi)
80
78
76
34 bar (500 psi)
74
72
70
500
1000
1500
2000
Input Speed, rpm
13
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
2500
3000
Performance
ADU041
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
70
52 (70)
280 bar (4000 psi)
Input Power , Kw (hp)
60
45 (60)
250 bar
(3600 psi)
50
37.5 (50)
200 bar
(2900 psi)
40
30 (40)
30
22.5 (30)
150 bar (2200 psi)
20
15 (20)
103 bar (1500 psi)
10
7.5 (10)
0
Input Torque Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
50 bar (700 psi)
500
1000
1500
2000
Input Speed, rpm
2500
3000
226 (2000)
280 bar (4000 psi)
250 bar (3600 psi)
Input Torque, Nm (in-lb)
181 (1600)
280 bar (2900 psi)
136 (1200)
150 bar (2200 psi)
90 (800)
103 bar (1500 psi)
50 bar (700 psi)
68 bar (1000 psi)
45 (400)
34 bar (500 psi)
0
500
14
1000
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
1500
2000
Input Speed, rpm
2500
3000
Performance
ADU041
134 (35)
35
3.5
Main Flow, lpm (gpm)
115 (30)
30
95 (25)
25
2.5
76 (20)
20
280 bar (4000 psi)
1.5
280 bar (4000 psi)
28 (10)
10
0
500
1000
1 (1.0)
4.0
3.0 (.75)
1.13 (10)
2.0
0.5 (.50)
.56 (5)
1.0
0.25(.25)
1500
2000
2500
Input Speed, rpm
3000
Input Torque, Nm (in-lb)
1.25
45.0 (400)
Case Flow, lpm (gpm)
Input Torque, Nm (in-lb)
15
1.5
11 bar (160 psi)
1000
50.5 (450)
1.75
20 bar (290 psi)
1.69 (15)
500
1500
2000
Input Speed, rpm
0
3000
2500
4.5
280 bar (4060 psi) Torque
4
39.4 (350)
3.5
33.8 (300)
3
28.0 (250)
2.5
22.5 (200)
16.9 (150)
11.3 (100)
5.6 (50)
0
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
0
500
28.0 (2.0)
150 bar (2175 psi) Torque
280 bar (4060 psi)
Case Flow
150 bar (2175 psi) Case Flow
1000
1500
2000
Input Speed, rpm
6.0 (1.50)
14.0 (1.0)
2.0 (.50)
0.5
2500
3000
Case Flow, lpm (gpm)
2
2.25 (20)
1.9
0.5(0.5)
Input Torque and Case Flow
Cut-off @ 49º C (120º F)
4.50 (40)
2.81 (25)
3.8
1 (1.0)
25 bar (365 psi)
Input Torque and Case Flow
Stand-by @ 49º C (120º F)
3.38 (30)
2
57 (15)
15
19 (5)5
3.94 (35)
3
25 bar (365 psi)
Case Flow, lpm (gpm)
Delivery and Case Flow
Versus Speed @ 49º C
(120º F)
0
Performance
ADU049
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
90
88
150 bar (2200 psi)
200 bar (2900 psi)
86
250 bar (3600 psi)
Efficiency (%)
84
280 bar (4000 psi)
82
80
78
76
74
500
1000
1500
2000
2500
3000
Input Speed, rpm
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
90
88
103 bar (1500 psi)
86
Efficiency (%)
84
68 bar (1000 psi)
82
50 bar (700 psi)
80
78
76
34 bar (500 psi)
74
72
70
500
16
1000
1500
2000
Input Speed, rpm
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
2500
3000
Performance
ADU049
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
Input Torque Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
271 (2400)
Input Torque, Nm (in-lb)
280 bar (4000 psi)
226 (2000)
250 bar (3600 psi)
181 (1600)
280 bar (2900 psi)
150 bar (2200 psi)
136 (1200)
103 bar (1500 psi)
90 (800)
50 bar (700 psi)
68 bar (1000 psi)
45 (400)
34 bar (500 psi)
0
500
17
1000
1500
2000
Input Speed, rpm
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
2500
3000
Performance
ADU049
Delivery and Case Flow
Versus Speed @ 49º C
(120º F)
Input Torque and Case Flow
Cut-off @ 49º C (120º F)
2.25
5.06 (45)
3.38 (30)
1.75
11 bar (160 psi)
2.81 (25)
1.5
1.25
2.25 (20)
4.0 (1.0)
1.69 (15)
3.0 (.75)
1.13 (10)
2.0 (.50)
.56 (5)
1.0 (.25)
500
1000
1500
2000
2500
Input Speed, rpm
3000
Input Torque, Nm (in-lb)
3.94 (35)
0
18
2
20 bar (290 psi)
Case Flow, lpm (gpm)
Input Torque, Nm (in-lb)
4.50 (40)
67.5 (600)
280 bar (4060 psi) Torque
56.3 (500)
45.0 (400)
33.8 (300)
280 bar
(4060 psi) Case Flow
150 bar (2175 psi) Case Flow
22.5 (200)
11.3 (100)
0
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
0
500
150 bar (2175 psi) Torque
1000
1500
2000
Input Speed, rpm
2500
3000
3
2.75
2.5
2.25
2
1.75
1.5
6.0 (1.50)
1.25
5.0 (1.25)
14.0 (1.0)
3.0 (.75)
0.75
2.0 (.50)
0.5
1.0 (.25)
0.25
0
Case Flow, lpm (gpm)
Input Torque and Case Flow
Stand-by @ 49º C (120º F)
Efficien
Performance
75
73
71
17 bar (250 psi)
69
ADU062
67
65
63
61
500
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
1000
1500
2000
Input Speed, rpm
2500
3000
90
200 bar (2900 psi)
150 bar (2200 psi)
88
250 bar (3600 psi)
Efficiency (%)
86
280 bar (4000 psi)
84
82
80
78
76
500
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
1000
1500
2000
Input Speed, rpm
2500
3000
91
89
103 bar (1500 psi)
87
68bar (1000 psi)
85
83
50 bar (700 psi)
Efficiency (%)
81
79
77
75
73
71
17 bar (250 psi)
69
67
65
63
61
500
19
1000
1500
2000
Input Speed, rpm
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
90
2500
3000
Performance
ADU062
ADU062 - Input Power Versus Speed 49º C (120º F),
Full Flow, and 1.0 bar (0 psi) Inlet
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
82 (110)
280 bar (4000 psi)
74.5 (100)
Input Power, kW (hp)
67 (90)
250 bar
(3600 psi)
60 (80)
52 (70)
200 bar
(2900 psi)
45 (60)
150 bar
(2200 psi)
37.5 (50)
30 (40)
103 bar
(1500 psi)
22.5 (30)
15 (20)
25 bar
(365 psi)
7.5 (10)
0
500
1000
1500
2000
2500
3000
Input Speed, rpm
ADU062 - Input Torque Versus Speed
@ 49 Deg C (120 Deg F), Full Flow, and 1.0 bar (0 psi) Inlet
Input Torque Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
317 (2800)
280 bar (4000 psi)
250 bar (3600 psi)
Input Torque, Nm (in-lb)
271 (2400)
200 bar (2900 psi)
226 (2000)
181 (1600)
150 bar (2200 psi)
136 (1200)
103 bar (1500 psi)
90 (800)
69 bar (1000 psi)
34 bar (500 psi)
45 (400)
0
20
500
1000
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
1500
2000
Input Speed, rpm
2500
3000
Performance
ADU062
ADU062 - Delivery & Case Flow Versus Speed 49º C (120º F)
Delivery and Case Flow
Versus Speed @ 49º C
(120º F)
191 (50)
172 (45)
25 bar (365 psi)
280 bar
(4000 psi)
134 (35)
Case Flow, lpm (gpm)
Main Flow, lpm (gpm)
153 (40)
115 (30)
95 (25)
76 (20)
57 (15)
28 (10)
1.9 (0.5)
19 (5)
0
3.8 (1.0)
280 bar (4000 psi)
25 bar (365 psi)
0
500
1000
1500
2000
2500
0
3000
Input Speed, rpm
Input Torque, Nm (in-lb)
4.50 (40)
3.38 (30)
11 bar (160 psi)
2.81 (25)
2.25 (20)
14.0 (1.0)
1.69 (15)
0.75
3.0 (.75)
1.13 (10)
0.5
2.0 (.50)
.56 (5)
0.25
1.0 (.25)
0
21
20 bar (290 psi)
3.94 (35)
500
1000
1500
2000
Input Speed, rpm
2500
67.5 (600)
56.3 (500)
Input Torque, Nm (in-lb)
Case Flow, lpm (gpm)
5.06 (45)
Case Flow, lpm (gpm)
ADU062
- Input Torque and Case Flow
Input Torque and Case
Flow
Cut-off @ 49º C (120ºCut-off
F) - 49 Deg C (120 Deg F)
Input Torque andADU062
Case Flow
- Input Torque and Case Flow
Stand-by @ 49º C (120º
F) - 49 Deg C (120 Deg F)
Stand-by
280 bar (4060 psi) Torque
45.0 (400)
33.8 (300)
22.5 (200)
280 bar (4060 psi) Case Flow
150 bar (2175 psi) Case Flow
150 bar (2175 psi) Torque
11.3 (100)
0
3000
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
0
500
1000
1500
2000
2500
Input Speed, rpm
3000
6.0 (1.50)
5.0 (1.25)
4.0 (1.00)
3.0 (.75)
2.0 (.50)
1.0 (.25)
0
Performance
ADU080
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
90
88
172 bar (2500 psi)
138 bar (2000 psi)
Efficiency (%)
86
207 bar (3000 psi)
84
82
80
78
76
74
500
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
700
900
1100
1300
1500
Input Speed, rpm
1700
1900
2100
2300
90
88
69 bar (1000 psi)
103 bar (1500 psi)
86
Efficiency (%)
84
34 bar (500 psi)
82
80
78
76
74
72
70
500
22
700
900
1100
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
1300
1500
Input Speed, rpm
1700
1900
2100
2300
Performance
ADU080
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
70 (93.9)
207 bar (3000 psi)
Input Power, kW (hp)
60 (80.5)
50 (67.1)
172 bar (2500 psi)
40 (53.6)
138 bar (2000 psi)
30 (40.2)
103 bar (1500 psi)
20 (26.8)
67 bar (1000 psi)
10 (13.4)
35 bar (500 psi)
0
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
Input Speed, rpm
Input Torque Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
350 (3098)
300 (2655)
Input Torque, Nm (lb-in)
207 bar (3000 psi)
250 (2213)
172 bar (2500 psi)
200 (1770)
138 bar (2000 psi)
150 (1328)
103 bar (1500 psi)
100 (885)
67 bar (1000 psi)
50 (443)
0
23
35 bar (500 psi)
400
600
800
1000
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
1200 1400 1600
Input Speed, rpm
1800
2000
2200
2400
Performance
ADU080
Delivery and Case Flow
Versus Speed @ 49º C
(120º F)
180 (47.6)
35 bar (500 psi)
160 (42.3)
Case Flow, lpm (gpm)
140 (37.0)
Main Flow, lpm (gpm)
207 bar (3000 psi)
120 (31.7)
100 (26.4)
80 (21.1)
207 bar (3000 psi)
60 (15.9)
1.5 (0.4)
1.0 (0.3)
40 (10.6)
35 bar (500 psi)
20 (5.3)
0
700
500
900
1100
1300
1500
1700
1900
2100
0.5 (0.1)
2300
0
Input Speed, rpm
Input Torque and Case Flow
Cut-off @ 49º C (120º F)
Input Torque and Case Flow
Stand-by @ 49º C (120º F)
8 (71)
60 (531)
4 (35)
3 (27)
20 bar (300 psi)
2 (18)
1 (9)
0
3 (0.8)
2 (0.5)
1 (0.3)
500 700
900 1100 1300 1500 1700 1900 2100 2300
40 (354)
30 (266)
20 (177)
6 (1.6)
207 bar (3000 psi)
10 (89)
0
Input Speed, rpm
24
207 bar (3000 psi)
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
0
4 (1.1)
2 (0.5)
500 700 900 1100 1300 1500 1700 1900 2100 2300
Input Speed, rpm
0
Case Flow, lpm (gpm)
5 (44)
Input Torque, Nm (lb-in)
50 (443)
20 bar (300 psi)
6 (53)
Case Flow, lpm (gpm)
Input Torque, Nm (lb-in)
7 (62)
Pump Installation
B-mount / Rear-ported
Top Case Drain
110.2
(4.34)
72.6
(2.86 )
(Diagnostic
Port)
69.1
(2.72 )
(Diagnostic
Port)
RH Rotation
46
(1.81)
72.1
(2.84 )
(Case Drain)
2X 13.6
(.54)
For Compensator Configuration See Separate Compensator
Installation Drawing
Optional Case Drain
Suction Port
For Shaft Configuration
See Separate Shaft
Installation Drawing
A
122.2
79.2 (4.81)
(3.12 )
Pressure Port
Optional
Diagnostic
Port
A
38.1 41.1
(1.50) (1.62)
4X .500-13 UNC-2B .77 Min.
-4X .375-16 UNC-2B .57 Min.
5.1
(.20)
Ø101.6
(4.00)
191
(7.52 )
2X 218
(8.58 )
87.9
(3.46)
9.4
(.37)
2X Ø14.2
(.56)
(Case Drain)
72.1 76.1
(2.84) (3.00)
(Case Drain)
146.1
(5.75 )
97.3
(3.83)
74.7
(2.94)
77.5
(3.05)
Bottom Case Drain
View A – A
LH Rotation
p. 22
P. 24
Pressure Port
5.1
).20 (
Ø101.6
)4.00(
.81 [20.6]
9.4
).37 (
25
Optional
Suction
PortDiagnostic Port
Optional Diagnostic Port
.81 [20.6]
87.9
)3.46(
191
)7.52 (
2X 218
192.6 [7.58]
)8.58 (
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
205.3 [8.08]
Pump Installation
B-mount / Side-ported
Case Drain Top
Case Drain Top
110.1
(4.34)
110.1
(4.34)
46
(1.81)
RH Rotation
73.8
(2.91)
74.7
(2.94)
72.1
(2.84)
(Case Drain)
73.8
(2.91)
74.7
(2.94)
For Compensator Configuration
See Separate Compensator
For Compensator Configuration
Installation Drawing
See Separate Compensator
Installation Drawing
A
2x 13.6
(.54)
46
(1.81)
72.1
(2.84)
(Case Drain)
2x 13.6
(.54)
Optional Case Drain
Optional Case Drain
A
122.2
(4.81)
79.2
(3.12)
(Case Drain)
Pressure Port
Pressure Port
(Ca
21.3
(.84)
5.1
(.20)
21.3
(.84)
72.1 76.1
5.1
(2.84) (3.00)
Optional
2x Ø14.2 (.20)
(Case Drain)
Diagnostic
Optional
(.56)
2x Ø14.2
(Ca
For Shaft
A
Port
Diagnostic
(.56
)
87.9
53.1 44.5
146.1
Configuration For Shaft
211.7
A
(2.09) (1.75 ) 53.1 44.5
Port
87.9
(3.46)
(8.34)
146.1
Configuration (5.75)
211.7 See Separate Shaft
.375-16
UNC-2B .57 Min.
(2.09-4X
) (1.75
)
Installation
(3.46) Drawing
(5.75)
See Separate Shaft
(
8.34
)
Optional Suction Port
-4X .375-16 UNC-2B .57 Min.
Installation Drawing
Optional Suction Port
240.9
(9.49)
240.9
238.5 (Diagnostic Port) (9.49)
97.3 (Diagnostic Port)
(9.39)
238.5
9.4
(3.83)
97.3
(9.39
)
(.37
)
9.4
(3.83) Bottom
Case
Drain
(.37
)
Bottom Case Drain
71.4
(2.81)
71.4
(2.81)
101.6
(4.00)
101.6
71.4
(4.00)
(2.81)
71.4
(2.81)
251.4 (Diagnostic Port)
(9.90)
(Diagnostic Port)
256.2 251.4
(10.09) (9.90) 256.2
(10.09)
View A – A
LH Rotation
Suction Port
Suction Port
4X .500-13 UNC-2B .77 Min.
4X .500-13 UNC-2B .77 Min.
218.1
(8.59)
26
218.1
(8.59)
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Pump Installation
C-mount / Rear-ported
Top Case Drain
122.9
(4.84 )
RH Rotation
46
(1.81)
74.7
(2.94)
For Compensator Configuration
See Separate Compensator
Installation Drawing
2x 15.4
(.61)
Optional Case Drain
Suction Port
For Shaft Configuration
See Separate Shaft
Installation Drawing
Pressure
Port
A
122.2
(4.81)
79.2
(3.12)
(Case Drain)
5.08
(.20)
114.3
(4.50)
Optional
Diagnostic
Port
A
41.1
38.1 (1.62)
(1.50)
4X .500-13 UNC-2B .77 Min.
-4X .375-16 UNC-2B .57 Min.
Bottom Case Drain
103.1
203.7 (4.06)
(8.02)
2x 230.7
(9.08)
12.4 2x Ø17.5
(.49)
(.69 )
110
(4.33)
72.1 76.1
(2.84) (3.00)
(Case Drain)
114.5
(4.508 )
178.3
(7.02 )
4x Ø14.33
(.564)
69.1
(2.72)
(Diagnostic
Port)
Ø127.0
(5.00)
72.6
(2.86)
(Diagnostic
Port)
View A – A P. 24
LH Rotation
Pressure Port
5.08
(.200)
Optional Diagnostic Port
.81 [20.6]
12.4
(.49)
27
Suction Port
103.1
(4.06)
203.7
(8.02)
2x 230.7
(9.08)
205.3 [8.08]
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
]
Pump Installation
C-mount / Side-ported
Case Drain Top
Case Drain Top
73.3
(2.89)
71.4
(2.81)
71.4
(2.81)
74.7
(2.94)
RH Rotation
Optional
Diagnostic
Port
A
Optional
Suction
Port
21.3
(.84)
A
Optional
Suction
Port
122.9
(4.84)
122.9
(4.84)
73.3
(2.89)
71.4
(2.81)
71.4
(2.81)
74.7
(2.94)
46
(1.81)
72.14
(2.84)
Case Drain Left
Case Drain Left
Pressure Port
5.1
(.20)
Pressure Port
114.3
(4.50)
12.4
103.1
A
53.1
44.5
224.4 (4.06)
(.49
)
103.1
(2.09) (1.75 ) 53.1 44.5
(8.84)
224.4 (4.06)
(2.09) (1.75
)
-4X .375-16
UNC-2B
.57 Min.
(8.84)
(9.99)
-4X .375-16 UNC-2B 253.6
.57 Min.
251.2 (Diagnostic253.6
Port)(9.99)
(9.89)
110 (Diagnostic Port)
251.2
Case Drain Bottom
4.33))
((9.89
110
Case Drain Bottom
(4.33)
264.1(Diagnostic Port)
(10.40)
268.9 264.1(Diagnostic Port)
(10.59 )(10.40) 268.9
(10.59 )
LH Rotation
Suction Port
Suction Port
4X .500-13 UNC-2B .77 Min.
4X .500-13 UNC-2B .77 Min.
230.8
(9.09)
28
230.8
(9.09)
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
5.1
(.20)
114.3
(4.50)
2x Ø17.5
(.69)
2x Ø17.5114.5
)
12.4
(.69(4.508
)
(.49)
178.3 (7.02)
4x Ø14.33
(.564)
4x Ø14.33
(.564)
Ø127.0
(5.00)
View A – A
72.14
(2.84)
2x 15.4
(.61)
For Compensator
2x 15.4
For Shaft
(.61) Configuration
Configuration See Separate
For
Compensator
Optional
See
Separate Shaft
Compensator Installation
Drawing
For Shaft Configuration
Configuration
See
Separate
Diagnostic
Installation Drawing
See Separate Shaft
Compensator Installation Drawing
Port
Installation Drawing
21.3
(.84)
A
46
(1.81)
Ø127.0
(5.00)
122.2
(4.81)
79.2
(3.12)
(Case
Drain)
72.1 76.1
(2.84)(3.00)
(Case Drain)
114.5
(4.508)
178.3 (7.02)
122
(4.8
79.2
(3.12)
(Case
Drain)
72.1 76.
(2.84)(3.
(Case Dr
Pump Installation
Thru-Drive SAE A
Ø82.63 ± 0.02
(3.253±.001)
7.9
(.31)
Groove to Accept an
Cap as 568A Size 042
(1/16 X 3 1/4 ID) O-ring
.375-16 UNC-2B
19
(.75) Min
3x .375-16
UNC-2A Thru
106.38 172.7
(4.188) (6.80)
86.4
(3.40)
106.38
(4.188)
For Output Shaft Configuration
See Separate Output Shaft
Installation Drawing
A Thru-Drive Cover Plate Installation
2X 15.5
(.61)
106.38
(4.188)
106.38
(4.188)
Optional
Mounting Position
9.5
(.38)
287.3
(11.31)
300.0
(11.81)
With Double
Shaft Seal
Output Shaft
Installation 9T Spline
Output Shaft
Installation 11T Spline
Maximum Torque
Maximum Torque
75 Nm (660 in-lbf)
119 Nm (1056 in-lbf)
Ø19.33 (.761) 11 Tooth 30˚ Flat
Root Side Fit 16/32 Class 1
Internal Spine per SAE J498B
Accepts 11 Tooth 30˚ Flat Root
Side Fit 16/32 External Splines
per SAE J498B Class 1 or ANSI
B92.1 Class 5 with 31.8 (1.25)
Extension From Mounting Flange
Additional Units Driven by
This Spline Must Not
Require More Than 118.6 N–m
(88 Lbf–ft) of Torque
29
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
31.8
(1.25)
287.3 (11.31)
300.0 (11.31)
With Double Shaft Seal
and C-mount
Pump Installation
Thru-Drive SAE B
Ø101.68±0.02
(4.003 ±.001)
10.4
(.41)
Groove to Accept an
as 568A Size 045
(1/16 X 4 ID) O-ring
4x .500-13 UNC-2B Thru
146.1 172.7
[5.75] [6.80]
86.4
[3.40]
146.1
[5.75]
For Output Shaft Configuration
See Separate Output Shaft
Installation Drawing
B Thru-Drive Cover Plate Installation*
2X 20.6 (0.81)
146.1 (5.75)
146.1 (5.75)
* Contact your Eaton Representative for this option.
30
9.7 (0.38)
287.3 (11.31)
300.0 (11.81)
With Double Shaft Seal
and C-mount
Output Shaft
Installation 13T Spline
Output Shaft
Installation 15T Spline
Maximum Torque
Maximum Torque
209 Nm (1850 in-lbf)
337 Nm (2987 in-lbf)
Ø22.5 (.886) 13 Tooth 30˚ Flat
Root Side Fit 16/32 Class 1
Internal Spline Per SAE J498B
Accepts 13 Tooth 30˚ Flat Root
Side Fit 16/32 External Splines
Per SAE J498B Class 1 or ANSI
B92.1 Class 5 with 41.2 (1.62)
Extension From Mounting Flange
Ø25.5 (1.006) 15 Tooth 30° Flat
Root Side Fit 16/32 Internal
Spline per ASA B5.15-1960
Accepts 15 Tooth 30° Flat Root
Side Fit 16/32 External Splines
per SAE J498B Class 1 or ANSI
B92.1 Class 5 with 46 (1.81)
Extension From Mounting Flange
41.2
[1.62 ]
287.3 (11.31)
300.0 (11.81)
With Double Shaft Seal
and C-mount
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
46
( 1.81)
287.3 (11.31)
300.0 (11.81)
With Double Shaft Seal
and C-mount
Pump Installation
Dual Shaft Seal
B-Mount Dual Shaft Seal*
5.7 (.22)
C-Mount Dual Shaft Seal*
Cross Section of Dual
Shaft Seal Assembly
Seal Leakage Drain
(VHO Filter Optional)
* Refer to C-Mount Pump installation drawings for port locations.
31
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Control Installation
Load Sense and Pressure Compensator
Load Sense and Pressure
Compensator
92.3
[ 3.63 ]
74.3
[ 2.93 ]
69.9
[ 2.75 ]
Load Sense Port
146.1
[ 5.75 ]
131.9
[ 5.19 ]
108.5
[ 4.27 ]
172.5
[ 6.79 ]
176.6
[6.95]
With Double
Shaft Seal
32
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Control Installation
Pressure Compensator
Pressure Compensator
158.1
[ 6.22 ]
106.2
[4.18]
With Double
Shaft Seal
93.5
[ 3.68 ]
117.9
[ 4.64 ]
103.7
[ 4.08 ]
33
71.4
[ 2.81 ]
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Control Installation
Torque Control
74.67
(2.94)
Compensator/Control
Not Shown For Clarity
148.59
(5.85)
262.12
(10.32)
34
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Control Installation
EH Inverse Proportional Pressure Control
(IPPC)
97.8
[3.85]
161.9
[6.37]
208.1
[8.19]
97.9
[3.85]
81.3
[3.20]
166
[6.54]
107.4
[4.23]
107.4
[4.23]
AMP CONNECTOR OPTION
35
DEUTSCH CONNECTOR OPTION
AMP CONNECTOR
DEUTSCH CONNECTOR
AMP CONNECTOR
DEUTSCH CONNECTOR
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
164
[6.4
Control Installation
Cold Start Valve
Load Sense Port
92.20
(3.63)
165.1
(6.50)
141.73
(5.58)
179.32
(7.06)
119.38
(4.70)
157.98
(6.22)
136.90
(5.39)
78.23
(3.08)
69.85
(2.75)
124.46
(4.90)
74.16
(2.92)
172.46
(6.79)
172.46
(6.79)
With Double
Shaft Seal Housing
93.47
(3.68)
With Double
Shaft Seal Housing
93.47
(3.68)
45.46
(1.79)
78.23
(3.08)
12 VDC
Flying Lead Coil
Shown
See Below
For Options
71.37
(2.81)
151.13
(5.95)
119.63
(4.71)
Optional Connectors
Deutsch Option
36
Metri-pack 280 Option Metri-pack 150 Option
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
External Manual
Stroke Adjustment
Maximum Stroke Limiter
18
[ .71 ]
Max Displacement
Torque 20±5 Lbf·ft
After Adjusting
Max Displacement
3.5
[ .14 ]
25% of Max
Displacement
Max Displacement is Reduced
By Approximately 5 to 6%
Per Clockwise Turn
20°
Compensator/Control
Not Shown For Clarity
105.1
[ 4.14 ]
177.9
[ 7.0 ]
190.6
[ 7.5 ]
With Double Seal Housing
and C-mount
37
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Input Shaft Options
01 Code
02 Code
Maximum Torque
209 Nm
(1850 in-lbf)
Maximum Torque
337 Nm
(2987 in-lbf)
6.31±.04 Key Width
(.248 +.001)
-.002
41.3
(1.62)
46
(1.81)
24.6
(.97)
28.6
(1.12)
3
[ .12]
3
[ .12]
+.12
24.9 -.11
28.16 +.11
-.12
(1.108 +.005 )
-.004
(.980 +.005)
-.004
Ø 22.21±.01
(.874 +.001)
-.000
03 Code
6.31±.04 Key Width
(.248 +.001)
-.002
0.1256
+.007
Ø25.393-.006
(.9998 +.0002 )
-.0003
05 Code
0.2480
Maximum Torque
209 Nm
(1850 in-lbf)
Maximum Torque
307 Nm
(2717 in-lbf)
41.3
[ 1.62 ]
Section A-A
0.9690
A
0.9060
.625-18 UNF-2A
Fits 13 tooth 30º Flat Root
Side Fit 16/32 Internal
Splines per SAE J498b
Class 1 or ANSI B92.1 Class 5
0.8750
0.1570
A
1.6 [63]
1.1250
0.3100
125:1000
[1.500:12]
1.6880
2.3410
38
Ø21.737 (.8558) 13 Tooth 30º
Flat Root Side Fit
16/32 Class 5 Spline
per ANSI B92.1 (Modified)
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Input Shaft Options
08 Code
32 Code
Maximum Torque
397 Nm
(3514 in-lbf)
Maximum Torque
640 Nm
(5660 in-lbf)
46
[ 1.81 ]
2.1850
Ø 24.912 (.9808) 15 Tooth 30º
Flat Root Side Fit
16/32 Class 5 Spline per
ANSI B92.1 (Modified)
Fits 15 tooth 30º Flat Root
Side Fit 16/32 Internal
Splines per SAE J498B
Class 1 or ANSI B92.1 Class 5
Ø 31.224 (1.2293) 14 Tooth 30°
Flat Root Side Fit 12/24 Class 5
Spline per ANSI B92.1 (Modified)
Fits 14 Tooth Flat Root Side Fit
12/24 Internal Splines per SAE
J498B Class 1 or ANSI B92.1
Class 5
33 Code
34 Code
Maximum Torque
450 Nm
(3980 in-lbf)
Maximum Torque
397 Nm
(3514 in-lbf)
0.3110
1.8120
2.1850
1.3120
Ø 24.912 [.9808] 15 Tooth 30° Flat Root Side Fit
16/32 Class 5 Spline per ANSI B92.1 (Modified)
0.1940
1/4-20 UNC-2B
1.3800
1.1600
1.2450
39
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
R0.6302
16
(.63)
Input Shaft Options
35 Code
38 Code
Maximum Torque
640 Nm
(5660 in-lbf)
Maximum Torque
450 Nm
0.3125
(3980 in-lbf)
0.1609
2.1850
Section A-A
Ø 31.224 (1.2293) 14 Tooth 30°
Flat Root Side Fit 12/24 Class 5
Spline per ANSI B92.1 (Modified)
Fits 14 Tooth Flat Root Side Fit
12/24 Internal Splines per SAE
J498B Class 1 or ANSI B92.1
Class 5
A
1.2190
1.000-12 UNF-2a
1.2492
A
Ø3.99 Thru
[.157]
1.6 [63]
0.3100
1.3750
1.9380
2.9040
40
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
125:1000
[1.500:12]
Center of Gravity
L3
L1
Lt
L2
L4
Rear Port
LcgL3
L4 LcgL3L4 LcgL3L4
Lt Lds
ADU041
ADU049
ADU062
ADU080 109.6 (4.31)
109.6 (4.31)
109.9 (4.32)
109.9 (4.32)
9.6 (0.38)
9.6 (0.38)
9.4 (0.37)
9.4 (0.37)
2.9 (0.11)
2.9 (0.11)
2.9 (0.11)
2.9 (0.11)
Side Port
114.7 (4.51)
114.7 (4.51)
114.9 (4.52)
114.9 (4.52)
9.2 (0.36)
9.2 (0.36)
9.0 (0.35)
9.0 (0.35)
2.4 (0.10)
2.4 (0.10) 2.4 (0.10)
2.4 (0.10)
Dimensions in mm (in)
Examples: Calculation L1 and L2
Tandem ADU062 Thru-drive with ADU041 Rear Ported
L1 = Lcg
131.3mm (5.17 inches)
L2 = Lt + Lcg
287.3mm + 109.6mm = 396.9mm (15.6 inches)
Tandem Dual Seal ADU049 Thru-drive with ADU049 Side Ported
L1 = Lcg + Lds
131.5mm + 13mm = 144.5mm (5.69 inches)
L2 = Lt + Lds + Lcg287.3mm + 13mm + 114.7mm =
415mm (16.34 inches)
Tandem Pump Applications
Eaton recommends that tandem pump applications be provided
with additional support to limit overhung loading of the mounting
flange. The thru-drive alternate attachment points on the rear flange
may be used with a customer designed support.
41
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Thru-Drive
131.5 (5.18)
131.5 (5.18)
131.3 (5.17)
131.3 (5.17)
8.2 (0.32)
8.2 (0.32)
8.0 (0.31)
8.0 (0.31)
2.1 (0.08)
2.1 (0.08)
2.1 (0.08)
2.1 (0.08)
Length
287.3 (11.31)
287.3 (11.31) 287.3 (11.31) 287.3 (11.31) Dual Seal
13.0 (0.50)
13.0 (0.50)
13.0 (0.50)
13.0 (0.50)
Installation
and Start-up
Warning: Care should be
taken that mechanical and
hydraulic resonances are
avoided in the application of
the pump. Such resonances
can seriously compromise
the life and/or safe operation
of the pump.
Drive Data
Mounting attitude should be
horizontal using the appropriate case drain ports to
ensure that the case remains
full of fluid at all times.
Consult your local Eaton
Representative if a different
arrangement is required.
Fluid Cleanliness
The 420 Series pumps are
rated in anti-wear petroleum
fluids with a contamination
level of 21/18/13 per ISO
4066. Operation in fluids with
levels more contaminated
than this is not recommended. Fluids other than petroleum, severe service cycles,
or temperature extremes
are cause for adjustment of
these codes. Please contact
your Eaton Representative
for specific duty cycle recom­
mendation.
42
In those cases where geometric tolerances of mounting are critical, or where
specific tolerance ranges are
required and not specified,
consult Eaton Engineering for
specific limits.
Direction of shaft rotation,
viewed from the prime mover end, must be as indicated
in the model designation on
the pump – either right hand
(clockwise) or left hand
(counterclockwise).
Direct coaxial drive through
a flexible coupling is recommended. If drives imposing
radial shaft loads are considered, please consult your
Eaton Representative.
Eaton 420 Series pumps, as
with any variable displacement piston pumps, will operate with apparent satisfaction in fluids up to the rating
specified here. Experience
has shown however, that
pump and hydraulic system
life is not optimized with high
fluid contamination levels
(high ISO cleanliness codes).
Proper fluid condition is
essential for long and
satisfac­tory life of hydraulic
Start-up Procedure
Make sure the reservoir and
circuit are clean and free of
dirt/debris prior to filling with
hydraulic fluid.
Fill the reservoir with filtered
oil and fill to a level sufficient
enough to prevent vortexing
at the suction connection to
pump inlet. It is good practice
to clean the system by flushing and filtering, using an
external slave pump.
Once the pump is started,
it should prime within a few
seconds. If the pump does
not prime, check to make
sure that there are no restrictions between the reservoir
and the inlet to the pump,
and that the pump is being
rotated in the proper direction, and that there are no air
leaks in the inlet line and connections. Also check to make
sure that trapped air can
escape at the pump outlet.
Caution: Before the pump is
started, fill the case through
the uppermost drain port
with hydraulic fluid of the
type to be used. The case
drain line must be connected
directly to the reservoir
and must terminate below
the oil level.
After the pump is primed,
tighten the loose outlet con­
nections, then operate for
five to ten minutes (unloaded) to remove all trapped air
from the circuit.
components and systems.
Hydraulic fluid must have the
correct balance of cleanliness, materials, and additives
for protection against wear
of components, elevated
viscosity and inclusion of air.
Eaton distributor. In this publication, filtration and cleanliness levels for extending the
life of axial piston pumps and
other system components
are listed. Included is an
excellent discussion of the
selection of products needed
to control fluid condition.
Essential information on the
correct methods for treating
hydraulic fluid is included
in Eaton publication 561 –
“Eaton Guide to Systemic
Contamination Control”
– available from your local
EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
If the reservoir has a sight
gage, make sure the fluid is
clear – not milky.
Eaton
Hydraulics Group USA
14615 Lone Oak Road
Eden Prairie, MN 55344
USA
Tel: 952-937-9800
Fax: 952-294-7722
www.eaton.com/hydraulics
© 2014 Eaton
All Rights Reserved
Printed in USA
Document No. E-PUPI-TM002-E4
Supersedes E-PUPI-TM002-E3
November 2014
Eaton
Hydraulics Group Europe
Route de la Longeraie 7
1110 Morges
Switzerland
Tel: +41 (0) 21 811 4600
Fax: +41 (0) 21 811 4601
Eaton
Hydraulics Group Asia Pacific
Eaton Building
4th Floor, No.3 Lane280 Linhong Rd.
Changning District
Shanghai 200335
China
Tel: (+86 21) 5200 0099
Fax: (+86 21) 5200 0400
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