Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: rectlons as regards the lubricating of his car. However, where these instructions are meagre, the following hints may be found useful. About every two or three months, open all petcocks on bottom of crank case, thus letting oil drain from each compartment. Flush the case with gasoline and refill with clean oil until it begins to run out of petcocks, after which they should be closed. Refill the transmission case whenever the supply gets below the gears. See that universal joints are lubricated every two weeks or oftener if necessary. About every two months replace oil in differential case. The steering gear is usually packed in grease and needs attention about every two months. CHAPTER X?RADIATORS The intense heat generated in the cylinder by the firing of the charge would make proper lubrication impossible unless some means were devised to keep the cylinder at a proper working temperature. There are two methods of cooling the cylinder?air, or direct cooling and water, or indirect cooling. Air-cooling is usually accomplished by means of flanges or gills cast on the cylinder or inserted pins or tubes, thus providing a large radiating surface. A forced draught of air is maintained by a fan driven by the engine for the purpose of increasing radiation with air currents at high speed. An air-cooled motor usually uses more oil than one which is water-cooled, the excess of oil aiding materially the cooling process. In an air-cooling system there is little to get out of order. Occasional attention as to the tension of the fan belt is all that is mecessary. In water-cooling there are two methods of effecting the water circulation; the forced circulation system by means of a pump driven by the engine and the gravity or natural circulation in which the natura…
