Works in the context of maintenance, in order to preserve the desired condition and operational readiness of industrial truck. The extent of the maintenance works and the method of execution are usually prescribed by the manufacturer as well as through the drive type and the type of the industrial truck. Industrial usage conditions and requirements determine the service intervals depending on the number of operating hours. The execution requires trained and qualified specialists. The manufacturer offers maintenance service as part of his customer service. Regular inspection and activities to be executed in relation to the maintenance service also contribute to preserving the value when original spare parts are used when exchanging wearing parts.