8
Eaton
Electro-hydraulic Fan Drive System E-SYFD-MROO1-E3 October 2008
Fan Drive System
Pump and Motor
Guide
powEr (Hp)
5
10
15
20
25
30
35
40
45
50+
Fixed Displacement Pumps
Eaton Gear 25500
Eaton Gear 26000
Eaton Gear GGP Aluminum
Vickers V10 Vane
Vickers V20 Vane
Variable Displacement Pumps
Vickers Piston PVE
Eaton Piston 420
Vickers Piston PVH
Fixed Displacement Motors
Eaton Gear 26000
Eaton Gear GGP Aluminum (unidirectional)
Eaton Piston 74111
Eaton Piston 74318
Eaton Piston 74624
Eaton Piston HD
Vickers Vane MU2
Vickers Vane 25 M
p
ump
S
m
o
t
or
S
21.3 - 55.2 cc
6.6 - 30.6 cc
5.3 - 33.4 cc
3.3 - 22.8 cc
19.5 - 42.4
25.2 • 41.0 • 45.1 cc
41.0 • 49.2 • 62.3 • 80 cc
57.4 • 73.7 • 98.3 • 131.1 cc
6.6 - 30.6 cc
5.3 - 33.4 cc
12.3 - 20.3 cc
32.9 - 49.2 cc
82.6 cc
54.4 - 105.5 cc
21.6 - 25.4 cc
43.6 - 68.7 cc
pumpS
motorS
Gear
• High efficiency design reduces flow-pressure ripple, noise, and vibration.
• Various shaft and porting options allow design flexibility.
• Tandem and multi-section pump options minimize circuit cost.
• Compact envelope design reduces space required for installation.
• Integrated relief priority flow valve options reduce fluid leak risks,
space requirements, and system costs.
Piston
• Versatile design includes single pumps, throughdrive arrangements, and
a variety of drive shaft and control options; adapts to many applications,
providing cost-effective variablepump installation.
• Proven components ensure longer life at the higher performance
levels of power-dense machinery.
• Compact housing and lightweight design allows better access for
installation and servicing.
• Heavy-duty bearing and shafts reduce internal deflections and wear,
providing longer life and operation time.
• Designed for maximum efficiency, directs more flow and input
energy to the work, not to heat and waste.
Vane
• Hydraulically balanced design increases the operating life of the
bushing/ bearing by eliminating side loads.
• Consistent efficiency over life is achieved by self-compensation of
vane wear.
• Quieter operation as compared to a gear pump.
• Integrated pressure compensated flow control ensures priority and
constant flow regulation.
• Compact common inlet with double pump configuration allows
versatility in application. One can be used for steering and the other
for fan drive.
• Flexible port orientation allows easy installation and prevents hose bends.
• Vane pumps are the most commonly adopted steering pump in
on-highway vehicles.
Gear
• High efficiency design reduces flow-pressure ripple, noise, and vibration.
• Various shaft and porting options allow design flexibility.
• Tandem and multi-section pump options minimize circuit cost.
• Compact envelope design reduces space required for installation.
• Integrated relief priority flow valve options reduce fluid leak risks,
space requirements, and system costs.
Piston
• Compact design reduces space required for installation.
• Lightweight durable housing minimizes system mass.
• Numerous shaft and porting options provide design versatility.
• Bi-directional rotation allows reversal of fan direction.
• Integral speed sensor available to provide optional closed-loop control
of fan speed.
• Fine tolerances reduce leakage and increase system efficiency.
• Low start-up torque requires less pressure build-up for operation.
Vane
• Lower starting torque as compared to gear and piston motors.
• Smoother operation with lesser jerks as compared to gear motors.
• Excellent capability to handle pressure shocks.
• Better efficiency at low RPM.
• No back pressure requirements as opposed to those in piston motors.
• Quieter operation with respect to gear and piston motors.
