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| Standard Bodies and In Stock Equipment |
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| About Jomac Lift Trucks and Cranes |
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Hydraulic Systems Explained
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| We talk about the benefits
of our American made hydraulic systems using a 2,500 psi system,
but what does it all mean? |
Less downtime means
more profit for you. Once again, Jomac looks toward protecting
your bottom line. Here is more proof. |
| First of all, we think being
American made is something to be proud of. All Jomac articulating
cranes and telescopic cranes are made in America using
high quality, dependable American SAE valves, fittings
and components. So as the years go by and you need a replacement
part for your crane, you can count on the fact that you'll
be able to find that part easily and inexpensively. This
also saves you in regard to downtime. Less downtime means
more production, leading to higher profits for you. |
| The benefits of an American 2,500
PSI system as opposed to a high pressure imported system. |
Many imported units
operate at over 4,500 psi. All Jomac systems are 2,500
psi. systems. To understand the benefits we have to offer,
you need to consider how a hydraulic system operates.
Most hydraulic systems consist of a pump, hoses
and lines, cylinders and motors, valves, a cooling
unit, a reservoir, filters and hydraulic fluid (oil).
At the heart of the system is the pump. It uses
energy from either a PTO drive from the vehicle
or an electric motor to pump the fluid and create
hydraulic flow. All Jomac cranes use the PTO method,
which allows for a 100% duty cycle. Jomac never
uses electric pumps. This also eliminates the possibility
of downtime due to electric motor failure, which
can be common.
The components of hydraulic systems work together intimately.
As a result, damage to one component may cause further
damage to others. For instance, overheated oil caused
by a leaky cylinder seals or extreme pressures can break
down and cause damage to other cylinders or the pump.
All of these components we just mentioned
are susceptible to damage by high pressure. The
higher the pressure, the more wear and tear on seals
and rings. |
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| All of these critical hydraulic components
and controllers are the highest quality, extremely durable
and readily replaceable if needed |
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A simple mathematical formula explains why bigger is better.
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Compounding the problem of higher
wear and tear due to increased pressure, high
pressure systems allow foreign manufacturers to use smaller,
cheaper cylinders. Consider the mathematical
formula for calculating cylinder pressure: Force = Cylinder
Area X Line Pressure.
A system that operates on 4,500 PSI pushing on a 2 inch
piston generates 9,000 ft. lbs. of force. To generate
this same amount of force a 2,500 PSI system like Jomac
uses requires a 3.6 inch piston. The result; Jomac
uses heavier duty components, subjects them to less stress
and therefore makes a longer lasting, more dependable
and cost efficient product for you, our valued customer. |
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Hydraulic
Systems Explained
Service Truck Bodies and Crane Trucks