Material is presented containing information on the meaning and functions of secondary springing systems, in particular, springing systems for cabins of wheeled and tracked vehicles. Characteristics of operational vibration effects on the cabin from the side of the running system, engine and transmission of the machine are considered. Technical solutions and calculations of cabin vibration isolators made of flexible materials, rubber-metal, metal and pneumatic vibration isolators are given. Technical solutions of bench equipment for vibration isolators tests are given, results of rubber-metal vibration isolators tests are given.