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350 Series
Mobile Pump
Introduction
Single Assembly*
The 350 Series mobile pump
is an advanced, closed circuit,
servo controlled, axial piston
design offered as either a sin-
gle or dual pump (two pumps
in one housing) for medium
duty hydrostatic circuits.
These pumps can be com-
bined with an Eaton motor to
transfer and control hydraulic
power in many different ways.
An efficient, reliable and
durable rotating piston group
allows the 350 series pump to
maintain continuous pres-
sures to 280 bar (4000 psi)
and 380 bar (5500 psi) rated
levels. This pressure capabili-
ty, coupled with high allow-
able input speed (3600 RPM),
along with a compact package
means superior power density
in the market place.
*Not yet released
Table of Contents
Introduction ........................................................................................................................................................................................2
Features, Controls, Applications and Specifications ..........................................................................................................................3
Model Code......................................................................................................................................................................................4-5
Manual Servo Displacement Control..........................................................................................................................................6-7
Solenoid Displacement Control ..................................................................................................................................................8-9
Hydraulic Remote Control............................................................................................................................................................10
Magnetic Speed Sensor ..............................................................................................................................................................11
2
EATON Dual Path Mobile Pump E-PUPI-TM005-E July 2006
High load, taper roller bear-
ings and a stiff drive shaft help
provide long bearing life at
rated mobile conditions,
reducing operating costs and
extending operating life.
350 Series pumps feature a
needle bearing under the
swash plate. This feature pro-
vides for better temperature
and contamination resistance.
The swash plate bearing
offers low control hysteresis
when matched with Eaton
control technologies.
The 350 series pump offers
the latest design in Eaton tech-
nologies for closed circuit pis-
ton pumps along with a wide
variety of responsive controls.
These controls include
mechanically or electrically-
actuated feedback controls,
hydraulic or electronic propor-
tional controls and a three
position (Forward-Neutral-
Reverse) electric control.
Dual Path Assembly
A large input shaft diameter
allows more through put power,
even with an integral charge
pump. When the 350 series
pump is fully loaded as much as
56 kW (75 hp) of through put
power is available for auxiliary
hydraulic power needs from the
SAE B auxiliary mounting pad.
350 Series pumps operate at
a level of quietness that
exceeds the requirements of
today's demanding work con-
ditions. Another pump feature
- a serviceable, bimetal valve
plate - improves pump filling
characteristics which, in turn,
reduces fluid-borne noise and
extends pump life. A highly
engineered pump housing and
swash plate also minimizes
noise and vibration.
Mounting flanges are offered
in SAE B and C configurations
and ports are offered in SAE,
ISO tube and flange and STC
direct port versions. Opposite
or same side port versions are
available to facilitate plumbing
and help the pump fit your
machine space needs. An inte-
gral gerotor charge pump can
be provided with up to four dif-
ferent displacement sizes allow-
ing for either remote or inlet
charge filter options.
The 350 series pump offers a
full range of product features
and has the ability to match
the needs of many different
customer platforms. It sup-
ports increased power
requirements in Agricultural,
Construction and Utility mar-
kets and allows for a wide vari-
ety of installation opportunities
for global machine design.
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