some notes on the lubrication of AGRICULTURAL TRACTORS: PART ONE THE TRANSMISSION Available to Purchase

From the point of view of lubrication the agricultural tractor compels attention if only because of its very large and rapidly increasing numbers. At the outbreak of war the United Kingdom was already one of the most advanced countries in respect of farm mechanisation, with an agricultural tractor population of about 55,000. During the past fifteen years, however, the number of tractors in service in the United Kingdom, excluding the small machines classed with cultivators, has increased to about 400,000 and new tractors are entering the home market at the present day at a rate of about 35,000 a year. In many other countries a similarly spectacular increase has taken place in the tractor population. At the same time the tractor has become a particularly important field of application of the diesel engine : in the United Kingdom the number of diesel tractors was insignificant before the war, but now accounts for about one tractor in six, and a large majority of tractors in current production in this country are diesel driven.