Plow bottom gusset stand up pouches are ideal for sugar, salt, and other granular products, as they are manufactured from a single piece of barrier film so that there is no seal.
The plow's third wheel allowed the
plow bottom to be carried on the plow frame, rather than being dragged through the ground, and made square corners easy.
Other sessions focus on broad topics: 100 years of the full-line John Deere company, assessing a 2-cylinder tractor for restoration,
plow bottom options, sickle mowers, toys, 2-cylinder crawlers, and lawn and garden tractors.
Although the tractor ran and handled well, it was too light and couldn't pull a single
plow bottom four inches deep because of wheel slippage.
Also, as it was cast in one piece, the whole
plow bottom had to be replaced when the point wore down.
The land wheel is usually placed directly opposite the
plow bottom to help counteract side thrust as the share and moldboard slice through the soil.
The TD-5 weighed 7,155 pounds and was rated for four
plow bottoms. Production ran from 1959 through 1964.
In the beginning, large tractors had a lot less horsepower than their modern counterparts, but that just meant they traveled more slowly, pulling the same number of
plow bottoms. The weight of the biggest grew over time, beginning in the 1920s at about 20,000 pounds for an internal combustion tractor (double that for steam) to as much as 50,000 pounds in the 1970s, when weight and horsepower peaked.
The eight
plow bottoms were carried in a frame that was "suspended by chains passing over grooved pulleys in two beams, projecting from the seat to the engine.
The book also touches on
plow bottoms, standards and coulters; additional attachments and miscellaneous and adjustments, as well as tips for restoration, field use and storage.
"Old used tablespoons--I had six or eight of them as
plow bottoms." The swather was pretty complicated, he remembers, with a wheel to drive it, a belt turning the canvas around, nails in the wheel as cleats to make it turn, and two blades underneath that piled up dirt and made it look like a swath after the toy swather had passed.
A year or two later, Ledbetter improved the heat jackets on the
plow bottoms and the exhaust pipe connections to provide more flexibility between tractor and plow.