TRACTOR RUNNING

Rotorua Morning Post, Volume 2, Issue 314, 30 August 1932, Page 2

TRACTOR RUNNING

DANGER OF LOW GRADE FUEL MUST BE WATCHED. EFFICIENT COMBUSTION. To ohtain the best possible operation froin a tractor it is desirable that the owner should carefully study everything connected with it, so that the troubles that have heset many a tractor may, as far as possible he avoided. One decision a tractor owner must make is in choosing a suitable fuel, which must always have a very important bearing on the operation v/hich may be expected from the machine. An essential requirement in a power kerosene for use in tractors is high volatility which means "readiness to vapourise. ICerosenes that will not vapourise readily are liable to have several effects, as enumerated below: The Right Mixture. Efficient combustion cannot he obtained with an unsatisfactory air-fuel mixture, and kerosenes of low volatility will not give a proper mixture. If the fuel is too heavy to readily mix with' the air, liquid particles will he carried into the cylinder as part of each charge. These liquid particles are practically incombustible in the normal kerosene engine and this means that the whole of each charge will not be burned. Maximum power output, therefore, cannot be obtained and mnch fuel is waster. Apart from being wasted the vapourised and unhurned fuel will do actual harm in its effect on the lubricating oil. Its washing effect on the lubricating film on the cylinder walls, and its final disposition in crankcase oil are dangerous. Crankcase oil dilution has ever been the bughear of the kerosene engine operator, as it. is the root cause of many hills for repairs and replacement of parts. It may seem stretching a point to directly connect the invoice for a new bearing with an invoice for a supply of low grade kerosene, but it has been proved time and again that the fuel used has been directly responsible for repairs needed. The wise tractor owner, therefore, uses a highly volatile kerosene, from which he can expect — and does get a complete combustion, which means delivery of full power from _ every and an absolute minimum of oil dilution. Its capacity for smooth idling for quick take-up of increased load, as well as its ability to permit switch over quickly and without trouhle, are governed by the volatility of a kerosme. Highly volatile kerosenes will do these things easily, whilst fuels of low votality will sinolce, splnttsr and stall because they do not readily iiespond to the varying needs of the engine. Anti-knock Propierties Volatility needs to be comhined with other attributes in the kerosene that wfill give ideal operation of a tractor engine. It is not worth having a, fuel of good volatility unless there is also high resistance to knocking in that fuel. High anti-detonating property in a kerosene means that you can work at full load, hour after hour, negotiate the tough hits of ground without faltering, all without that lcnock that tells you power is being lost and engine parts strained. Voco Power kerosene is well-known for its excellent knock-resisting properties. Further, what is the use of having a fuel with high volatility and good lcnock resisting properties if that fuel happens to h'e imperfectly refir.ed, or carelessly handled in transit or in packing. Foreign matter, such as water or traces of ehemicals I that have been used in refinind pro"cesses, are often in inferior kerosene. In the interests of efficient tractor operation it will pay the tractor owner to use quality fuel like Voco Power Kerosene. _______