The systems were a big hit with auto body shops initially for pushing out dented fenders, then later were adapted to frame straightening machines for pulling a badly crunched vehicle back to original factory specs.
Three systems evolved - 4 ton, 10 ton and 20 ton-plus. The 4 ton was popular for simple dent pushing of light gauge metal while the 10 ton became the professional must-have system for general body shop work. The 20 ton-plus system was left for the big rig work and found a home in the construction field as well (with rams capable of pushing 20, 100, 500, 1000 tons and more - these 'bad boys' could lift bridges, buildings and more - See INDUSTRIAL HYDRAULIC SYSTEMS).
The ram sizes in the 10 ton systems usually consist of a 6 inch and a 10 inch model with effective strokes of approximately 5 and 9 inches.
Note: Over the past 20 years a new style of 'snap-on' extensions have come into popularity for quicker changing of extensions.
The 20 ton-plus systems range from about 8 inches up to as much as 2 feet and do not generally use threaded extensions.
In addition to standard rams most systems offer 'wedgie/spreader rams' which can start at a low height of as little as three eighths of an inch and open to more than 3 inches, but usually with less than 2 tons of pushing power. Also, a few 'low profile' rams are available that start at around 2 to 3 inches and have a lifting stroke of 1 1/2 to 2 1/2 inches with 4, 10, 20 and even more tons capacity, however these are generally left to the construction and special use fields and are not usually stocked by most dealers.
PORTO-POWER SPECS AND PRICE
INFORMATION
INDUSTRIAL HYDRAULIC SYSTEMS
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OTTO SERVICE CO., PO BOX 1805, Sun Valley, California 91353-1805
United States of America
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