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A pair of gladhand connectors between railroad cars A gladhand connector on a trailer. A gladhand connector or gladhand coupler is an interlocking hose coupling fitted to hoses supplying pressurized air from a tractor unit to air brakes on a semi-trailer, [1] or from a locomotive to railway air brakes on railroad cars. [2]
If you have a trailer with a lot of lights the diode and relay wiring is preferred, but if you have a trailer with a simple light arrangement it is usually sufficient to wire to 58L. In market there are many special converters [ 1 ] [ 2 ] [ 3 ] that solves the problem of connecting a car with European wiring to a trailer with North American wiring.
A box was designed with a yellow strobe light, and equipment for monitoring air pressure through the brake line was designed to be installed in the unused coupler of the last car. Later, as cabooses were phased out, railroads moved to their current use of an end-of-train device to mark the end of the train.
The parking brake is the air operated spring brake type where the brake is applied by spring force in the spring brake cylinder (12) and released by compressed air via a hand-control valve (7). The trailer brake consists of a direct two-line system: the supply line and the separate control or service line.
7-pin ISO 1724 trailer connector type 12N (Towing vehicle side). This connector uses a mix of pin and socket terminals. Physical design according to standard ISO 1724. [4] [8] The 7-pin connector uses all 7 pins on newer trailers according to the ISO standard. [9] [10] On older trailers there's sometimes a 5-wire setup using a 7-pin connector.
A Standard Stock control trailer dating from 1923 had been fitted with a streamlined end. A Tomlinson coupler, which as well as connecting cars together mechanically, also connected the electric and hydraulic systems together automatically, was tried out on two cars, and another had an experimental air-conditioning system fitted.