4 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E4 November 2014
Model Codes
420 Mobile Piston Pump
1 2 3
Pump Series
ADU – 420 Series Open
Circuit Piston Pump
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]
7
Input Shaft Rotation
R – Right Hand
L – Left Hand
8 9
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
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
10 11
Main Ports Size
& Location
AA –
Rear Ports
Suction - 2” (Code 61);
Pressure - 1” (Code 61)
AB –
Side 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
& ADU049 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)
12
Case Drain Ports
1 – #12 SAE O-Ring - Top
2 – #12 SAE O-Ring - Bottom
3 – M27 x 2 O-Ring - Top
4 – M27 O-Ring - Bottom
5 –
#12 SAE O-Ring - Left Side
(Swash Sensor Boss)
6 – G 3/4 (BSPP) - Top
13
Diagnostic Pressure Ports
Not available on thru-drive
units
0 – No Diagnostic Pressure
Ports
1 – #6 SAE O-Ring - Plugged
(Rear Ports Only)
2 – M14 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)
14
Controller Type
A – Pressure Flow
Compensator With
#4 SAE O-Ring
Load Sense Port
B – Pressure Flow
Compensator With
M12 Metric O-Ring
Load Sense Port
C – Pressure Compensator
Only
E – Pressure Flow
Compensator With
G 1/4 (BSPP) Load Sense
Port
H – Pressure Flow
Compensator With
Torque Control #4 SAE
O-Ring Load Sense Port
J – Pressure Flow
Compensator With Torque
Control M12 Metric O-Ring
Load Sense Port
K – Pressure Compensator
With Torque Control
V – EH Inverse Proportional
Pressure Control
W – Remote Pressure Control
with .4375-20 SAE O-Ring
Port, Left Side
#
15 16
Pressure Compensator
Setting (Tolerance on
Setting)*
28 – 207-214 bar
[3000-3100 lbf/in2]
35 – 241-248 bar
[3500-3600 lbf/in2]
43 – 276-283 bar
[4000-4100 lbf/in2]
ADU 062 R 08 AB 1 0 A 43 14 00 0A 1 AB 1 00 CD 0 B
1
7 12 13 14 21 22 23 26
2 3 4 5 6
8 9
10 11 15 16 17 18 323129 3027 2824 2519 20
* Additional Settings Available by
Request
# - Recommend RPC pressure settings
10-21 bar (140-350 psi)
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