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The bearing connecting the Pitman arm to the crankshaft is known as the Pitman bearing. Early Pitman arms (up until around 1905) were made of wood, whereas later Pitman arms were made of steel. Wooden Pitman arms usually employed a simple wooden bushing around a steel shaft at both ends.
The recirculating ball steering mechanism contains a worm gear inside a block with a threaded hole in it; this block has gear teeth cut into the outside to engage the sector shaft (also called a sector gear) which moves the Pitman arm. The steering wheel connects to a shaft, which rotates the worm gear inside of the block.
1976: Radiator (AMC Matador), engine (Chevy 350 V8 2-barrel carb, cylinders were over-bored, requiring larger pistons and rings), transmission (TH 400: Turbo Hydra-Matic), differential (Spicer 44), front lower A-frame (Ford 56 Thunderbird), front upper A-frame (63 Lincoln Continental), steering was rear drag link until 1980, pitman arm bushing ...
A parallelogram steering linkage is called such because like its namesake, the two sides of the linkage run parallel to each other and are equal in distance. This type of steering linkage uses four tie rods, one inner and one outer on each side (left and right) that are connected by an adjustment sleeve, a center link (which runs between the tie rods), an idler arm on the passenger side, and a ...
Steering system showing drag link. A drag link converts rotary motion from a crank arm, to a second bellcrank, usually in an automotive steering system.. While the origin of the term is not clear, it pre-dates the automobile, and is described as in use in 1849 as a means of rotating a Ducie cultivator being operated by cable by stationary steam engine (or between engines).
The steering column turns a large screw, which meshes with the nut by recirculating balls. The nut moves a sector of a gear, causing it to rotate about its axis as the screw is turned; an arm attached to the axis of the sector moves the pitman arm, which is connected to the steering linkage and thus steers the wheels. The recirculating ball ...
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Bump steer can be adjusted by moving any of the front suspension components pickup points Up, down, in or out. For example: Say the inner tie rod mounting point is moved up either by moving the rack or modifying the pitman arm mounting point or arm drop. The result is the tie rod's arc will change.