Service Manual

We use several different hydraulic systems
across our product line. All
of these systems are
made from the basic components described
earlier and operate by using the fundamental
principles of hydraulics.
Eaton Model 7
This hydrostatic transmission has a variable
radial-ball piston pump and fixed displacement
radial-ball motor. Maximum pump output is
0.465 cu. in.(7.62cc) per revolution. The motor
output is 0.767 cu. in (12.57 cc) per revolution. It
does not use a charge pump. A fine screen at
the bottom of the reservoir provides for filtration
of incoming oil. This unit must be coupled to a
final drive to provide power to the drive wheels.
Eaton Model 11
The Eaton 11 is similar to the model 7 but is
considerably larger and uses an auxiliary charge
pump. The pump displaces a maximum of 1.1
5
cu.in.(18.85cc) per revolution and the motor
has a 2.09 cu. in. (34.25 cc) displacement per
revolution. The charge pump supplies a
maximum flow of 1.5 gpm
(5.7 l/min) [0.10cu.
in. per revolution (1.6cchev)] and can provide
power for a hydraulic attachment lift. This
system is used with a separate filter and
reservoir. Again, this unit must be coupled to a
final drive to power the drive wheels.
23
1.1311.2
1.1311
Productivity Series