Classic Machines: International's TD25 tractor скачать в хорошем качестве

Classic Machines: International's TD25 tractor

Thanks for checking out NZ Contractor magazine's TD25 YouTube clip. Following on from its very successful model TD24, International Harvester introduced its successor, the TD25 in 1959. Rather than being a scaled up version of the TD24, the TD25 was a completely new machine. The former TD24 had not been without its faults, which, over its production life, International had tried very hard to iron out. Basically these problems took the form of transmission failures and cylinder head cracking and were caused in part by rushing the machine into service without adequate testing in order to compete with Allis-Chalmers’ HD-19. While many improvements were made, International never completely cured the head-cracking problem despite several modifications to the design. International was determined not to make the same mistake again. Size-wise, the new TD25 competed head on with Caterpillar’s D8H and Allis- Chalmers’ new HD21 – both formidable tractors in their own right. Initial deliveries of the machine commenced in 1959 and it quickly became apparent that International had made a really good tractor. Both power shift and direct drive versions of the machine were available. An improved model TD25B was released in 1962 featuring more horsepower(up from 230 to 240hp) and some minor refinements to the shape of the sheet metal on the bonnet & radiator guard. The TD25B was a popular tractor and sold in quantity. Following on the success of the TD25B came the TD25C in 1974 with a further increase in horsepower, now up to 285hp, and a weight gain of almost two tons over the previous TD25B. Another feature was the completely revised hood assembly which was considerably more rounded than its predecessors. The last model that International Harvester had anything directly to do with was the TD25E introduced in 1979. Following this, International’s earthmoving division was sold to Dresser Industries and Dresser continued to build and market the TD25E and introducing a TD25G in 1984. By now, the machine produced 320 horsepower and was far removed from the original TD25. Following significant losses by Dresser in 1987, Komatsu entered the picture and picked up a 50 percent share in Dresser. Komatsu had no need for a track type tractor line as it already had a very successful one of its own so the Dresser track type tractors were sold to HSW Industries of Poland in 2005 where the TD25 continues to be produced today, now known as the Dressta TD25H’ The TD25 Described We will examine the TD25C model which, to date, is the most widely produced version of the TD25. Power was provided by an International DTI817B, 6-cylinder, turbocharged and aftercooled diesel rated at 285 flywheel horsepower. This was connected via torque converter to a 2-speed powershift transmission with a high and low range, effectively giving the machine 4 forward and reverse speeds. It is worth noting at this point that International also offered a manual transmission option for the TD25C featuring 8-speeds and an oil clutch. A very substantial tub with bolted on side frames formed the basis of the chassis. Track frames were massive and held seven bottom rollers and two carrier rollers per side. The frames were pivoted at the rear through the double reduction final drives and kept in alignment by a pinned equalizer bar which allowed track oscillation of some 17 inches. Recommended standard track shoe was 22 inches although, of course, other options were available depending on customer requirements. Steering was of the planetary type with both tracks powered at all times. Each track had high, low or neutral positions that allowed gradual or sharper turns. A very wide and clean deck area was provided for the operator who sat in a deeply cushioned seat. From the seat visibility was very good all round including to the rear over the contoured fuel tank. Controls consisted of the transmission control, set in a short pedestal to the operator’s left, steering levers which projected out from under the seat and the blade or other implement controls to the right, the configuration of which changed considerably over the years. The only pedals on the deck were the decelerator and master brake. From the ‘C’ model onwards a ROPS cab was available as an option along with the usual creature comforts of heating and air conditioning. These clips are made from images published in conjunction with classic machine reviews at http://www.contractormag.co.nz/catego... Captions and associated images have all been uploaded to Pinterest.