Care and Operation of the "Caterpillar" 75 Tractor

Care and Operation of the "Caterpillar" 75 Tractor

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...of one thirtysecond of an inch over the valve stem. This distance must not be varied. Fig. 18 shows a diagram of the cam, valve rod and rocker arm giving a clear-ance of one thirty-second of an inch over the valve stem when the cam is pointing downwards. Carbureter adjustment can be interfered with very readily and the engine can lose power if the clearance is greater or less than one thirty-second of an inch. 155--The magneto must fire the compressed charge at the proper point. See para-graph 180. page 51, for the proper timing of the magneto. When to Commence Carbur-eter Adjustment 156--In general, it may properly be said that the adjustment of the carbureter commences by being sure the butterfly shaft and bearing, intake mani-fold, intake manifold gaskets, valves, valve stem guides, piston and piston rings exclude the en-trance of air from the combustion chamber, thus causing all the air to enter through the carbureter. Mechanical details to be looked after are to make sure that the rocker arm has a clearance of one thirty-second inch from the valve stem and that the mixture is fired at the correct point by the magneto. Adjusting Carbureter J57, After all connections are properly made, see that the air valve "A" seats lightly but firmly. This is regulated by adjusting screw "M." Turning adjusting screw "M" to the right increases, and turning to the left decreases the tension of the air valve spring "O." Care should be taken not to screw needle valve "E" into spray nozzle tightly. It has a tendency to increase the size of the opening and will give a richer mixture. The needle valve "E" should be closed lightly and then opened about one complete turn. 158--ln making more

Product details

  • Paperback | 34 pages
  • 189 x 246 x 2mm | 82g
  • United States
  • English
  • black & white illustrations
  • 1236915186
  • 9781236915184