Fomatec Oy services cylinders that are used in forestry machines. A cylinder maintenance procedure costs about one-half of the price of a new cylinder. For instance, a new rod is made to substitute for the used rod, and all seals are replaced with new ones. A damaged cylinder barrel is replaced with a new barrel, and if necessary leaks are repaired by welding. Moreover, damaged cylinder heads are repaired or substituted for new ones. Every time a cylinder is serviced all seals are replaced with new seals. After maintenance all cylinders are carefully tested. Each serviced cylinder is granted a 12 months warranty for repairs.