WATERLOO, Iowa – Tracks have long been seen as an advantage for better traction with less compaction. John Deere’s release of the 8R series tractors in track form might provide a new option for producers looking for a seed drill capable unit.
The 8R series is a new line of tractors aimed at the row crop producer. On tires they start at 225 horsepower and on tracks 295 h.p. They top out at 345 h.p. for both options.
However, with the machine’s wide stance, user adjustable footprint and wide track option, the largest of the line, the 345 horsepower 8345RT has the capability to operate all but the largest precision seed drill.
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Many of those seeding units on 10, 12 or 14 inch spacings are planting at less than 13/4 inches deep, with most seeding below an inch deep.
For producers whose big tractors see nearly all of their duty in spring, the largest of the new tracked Deeres have a prairie market, said Chad Hogan, at the Waterloo Tractor Works where the machines are built.
“We believe that these will be the most fuel efficient tractors on the market today. So for a producer who doesn’t need the bigger machines, and wants to keep his soil compaction to a minimum and can right-size his tractor to minimize his fuel use, these new machines may be the right choice,” he said.
Tracks and radial tires have the ability to reduce compaction, but tracks are generally better when it comes to limiting impact on and under the surface.
However, where long highway moves are concerned, track wear becomes an issue.
On most tractors, the best agricultural radial tires inflated at five to eight pounds per sq. inch will exert a force on the soil of one to two pounds more than their inflation pressure, resulting in a force of six to 10 p.s.i.
Tracks deliver about five p.s.i, according to the University of Minnesota. Tracked machines will also out-pull a similarly sized, tire-equipped tractor and eliminate wheel hop problems.
Track widths between 16 and 30 inches are available, with 25 or 30 being the most likely selection for non-row crop application.
The new 8R and RT machines have the hydraulic capacity to meet the needs of the largest precision drill systems, fan motors and shank pressure systems.
According to the University of Nebraska tractor test data, the units have a 44 gallon per minute flow as standard, with 60 gpm optional.
The infinitely variable transmission and field operation controls allow operators to set a fixed speed, while the tractor looks after gearing to ensure the engine is at its most fuel efficient.
The new command view cabs offer good visibility and the 18,300 pound three-point hitch and 275 h.p. power take-off.
“And they are a great row crop tractor too,” he said.
