12
Hydraulic Systems
Accurate diagrams of hydraulic circuits are essential
to the technician who must diagnose and repair
possible problems. The diagram shows how the
components will interact. It shows the technician how
it works, what each component should be doing and
where the oil should be going, so that he can
diagnose and repair the system.
There are two types of circuit diagrams.
Cutaway Circuit Diagrams show the internal
construction of the components as well as the oil flow
paths. By using colors, shades or various patterns in
the lines and passages, they are able to show many
different conditions of pressure and flow.
The other type of diagram is the Schematic Circuit
Diagram.
Schematic Circuit Diagrams are usually preferred
for troubleshooting because of their ability to show
current and potential system functions. A schematic
diagram is made up of consistent geometric symbols
for the components and their controls and
connections.
Schematic symbol systems:
I.S.O. = International Standards Organization.
A.N.S.I. = American National Standards Institute
A.S.A = American Standards Association
J.I.C. = Joint Industry Conference
A combination of these symbols are shown in this
manual. There are difference between the systems
but there is enough similarity so that if you
understand the symbols in this manual you will be
able to interpret other symbols as well.
Hydraulic Reservoirs
Reservoirs are pictured as either an open square
meaning it is a vented reservoir, or a closed reservoir
meaning that it is a pressurized reservoir. Every
system reservoir has at least two lines connected to
it, and some have many more. Often the components
that are connected to it are spread all over the
schematic. Rather than having a lot of confusing
lines all over the schematic, it is customary to draw
individual reservoir symbols close to the component.
Similar to the ground symbol in some wiring
schematics. The reservoir is usually the only
component to be pictured more than once
Toro University Technical Training
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Wikipedia's Page | Toro Company |
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