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Like all Janney couplers, the Tightlock is "semi-automatic". The couplers automatically lock when cars are pushed together, but workers must go between cars to hook up the air lines for the pneumatic brakes and connect cables for head-end power and other communications. To separate cars, a worker must use a lever to move the locking pin that ...
The semi-trailer increased the capacity of trucks, but it was the fifth wheel that brought the flexibility for drivers to keep moving while receivers unloaded the loads they just delivered. The Fruehauf Trailer Corporation helped to make the Martin Rocking 5th Wheel a success by installing them on their popular new semi-trailer design.
A tapered lock is a form of keyless shaft locking device [6] that does not require any material to be removed from the shaft. The basic idea is similar to a clamp coupling but the moment of rotation is closer to the center of the shaft. [ 7 ]
The Wedglock coupler is named for the pneumatic wedges that lock the moving parts of the coupler head in the engaged position. It is the standard automatic coupler used on London Underground trains. The coupler was introduced in 1936 [56] and is manufactured by William Cook Rail [57] and Voith. [58]
Stepping down on this pedal locks the rear differential. The left lever engages the front axle , and the right one enables selection between high and low speed gearing. Some utility vehicles such as tow trucks , forklifts , tractors , and heavy equipment use locking differentials to maintain traction, especially when driving on soft, muddy, or ...
McMahill said the truck was in front of the hotel for 15 to 20 seconds before it exploded. He said that it was rented in Colorado and license plate readers caught it arriving in Las Vegas ...
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