These are in service with SA-3 Pichora squadrons, these vehicles are part of SA-3 Pichora batteries. Kraz- 255 is used to pull launchers of SA-3 Pichora launchers weighing around 13200 kg, AD-100 generator set, guidence radar can split in 2 pieces. Antenna of radar is pulled by YB-600 trailers. Lower part of radar is itself a trailer with wheels , it YB-550 trailer. There are six Kraz-255 per battery, five for permanent use and one stand by. India every Pichora squadron has two batteries and every battery has three launchers. In Russia they used to have four launchers per battery but we purchased only three per battery. Zil-131 carry YNK radar cabin. Radar cabin has panels like GO panel, Battery commander panel etc. GO(guidence officer) panel is called 61 panel, battery commander panel is called 62 panel. Zil TLV vehicle (transport and loading vehicle) has different configurations, it carries missiles and is used as loading and reloading vehicle of missiles on launchers. Per battery two Ural vehicles are used for pulling RKY cabin ( power distribution cabin) and PRM cabin ( secret library consists of publications related to SA-3, technical, operating manual, instructions, diagram manual, combat drill manual, training notes hand written by crews). Kraz-255 carry all accessories of launchers in its trailer. AD-100 generator is pronounced as Ada 100 just like Russians pronounce it, YB-600 is pronounced as ube 600 just like Russians pronounce it, YNK radar cabin is pronounced as uenka cabin just like Russians pronounce it.