Pyongyang Trolleybus Factory

During its existence, it has also manufactured vans, refrigerated trucks and buses although its main product are the Chollima branded trolleybuses.

The first serially produced vehicle, the Chollima-9.11, was first built in 1961 although still bearing a strong resemblance to the Jinghua BK561.

[6] The visit of Kim Il Sung in fall 1961 is commemorated in a large mosaic located in the factory courtyard, which depicts when he visited the factory, after the construction of a line along Stalin avenue and People's Army avenue, before the commencement of passenger traffic.

[1] Andrei Lankov wrote that in the mid-1980s, the factory constructed trolleybuses in an extremely crude manner, with practically no mechanisation, such as the use of stamping or pressing equipment.

Workers had to shape the material by hand through the use of sledgehammers, resulting in dents on the bodywork.

[7] During the period of fuel shortages in the Arduous March, the trolleybus factory converted diesel Karosa and Ikarus buses to electrical operation due to the scarcity of fuel, although electricity in that period was not easily available either.

[6] From 2015 to 2017,[8] the trolleybus factory underwent its extensive refurbishment, introducing precision tools, such as CNC mills.

[11] Before the renovation, due to the lack of ability to produce electronic parts, they had to be sourced from China, leading to speculation that in the future, the trolleybus factory would only be responsible for making bodies and importing the other components.

[12] Previously, articulation joints used in the Chollima-091 were copies of the Ikarus 280 mechanism, which was liable to jamming and creaked loudly in service.

In 2019, the factory provided assistance to the Pyongsong Transport Company in constructing three newer trolleybuses, two in the style of Chollima-321.

[14] The trolleybus factory has also designed other forms of transport, including infrastructure, trams and buses.

[18] The trolleybus was built to be a present to the 4th Congress of the Workers' Party of Korea[19] Number 903 has been preserved as an honorary vehicle of Ryonmot depot, as Kim Il Sung rode it on 15 May 1964 and Kim Jong Il rode it on 14 May 1964.

[21] A special service trolleybus was developed on the basis of Chollima 9.25, using just the front section it.

[27] The letters '천 리 마' are located above the grille, while the number '72' is placed on it.

[1] The vehicle is also known as Sogiryon, named after So Gi-ryon, the vice chairman of the Education Association of Chongryon who donated the funds for the construction of these trolleybuses.

It involved installing batteries under seats arranged along the sides of the trolleybus,[8] which would allows it to travel without having the trolley pole contact the overhead network.