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  2. Two-wheel tractor - Wikipedia

    en.wikipedia.org/wiki/Two-wheel_tractor

    Two-wheel tractor or walking tractor (French: motoculteur, Russian: мотоблок (motoblok), German: Einachsschlepper) are generic terms understood in the US and in parts of Europe to represent a single-axle tractor, which is a tractor with one axle, self-powered and self-propelled, which can pull and power various farm implements such as a ...

  3. Two-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_engine

    Animation of a two-stroke engine. A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston (one up and one down movement) in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle.

  4. Two-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_power_valve_system

    A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...

  5. Oil field engine - Wikipedia

    en.wikipedia.org/wiki/Oil_field_engine

    Founded by Edwin Fithian and John Carruthers in 1898 as Carruthers-Fithian Clutch Company, merged with C&G Cooper in 1929 to form Cooper-Bessemer [2] Joseph Reid Gas Engine Company: Oil City, PA: 1894-1939: Unique two-stroke design, utilized a separate charging cylinder to pre-compress fuel/air mixture before ignition, similar to the modern ...

  6. Cultivator - Wikipedia

    en.wikipedia.org/wiki/Cultivator

    Similarly sized rotary tillers combine the functions of a harrow and cultivator into one multipurpose machine. Cultivators are usually either self-propelled or drawn as an attachment behind either a two-wheel tractor or four-wheel tractor. For two-wheel tractors, they are usually rigidly fixed and powered via couplings to the tractors ...

  7. Tractor - Wikipedia

    en.wikipedia.org/wiki/Tractor

    The Ford N-series tractor helped revolutionize modern mechanized agriculture with its Ferguson three point hitch. A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction.

  8. Harrow (tool) - Wikipedia

    en.wikipedia.org/wiki/Harrow_(tool)

    In addition, there are various types of power harrow, in which the cultivators are power-driven from the tractor rather than depending on its forward motion. Tine harrows are used to refine seed-bed conditions before planting, remove small weeds in growing crops, and loosen the inter-row soils to allow water to soak into the subsoil. The fourth ...

  9. Oil pump (internal combustion engine) - Wikipedia

    en.wikipedia.org/wiki/Oil_pump_(internal...

    The leading cause of low oil pressure in an engine is wear on the engine's vital parts. Over time, engine bearings and seals suffer from wear and tear. Wear can cause these parts to eventually lose their original dimensions, and this increased clearance allows for a greater volume of oil to flow over time which can greatly reduce oil pressure.