With a tight movement of the pedals, the working surfaces of the pedals, bushings and axles are inspected. If shallow scratches or traces of oxidation are found on the surfaces of metal parts, they are polished with sandpaper with a grain size of 10 to M40. Non-metallic parts are replaced with new ones at each disassembly.
Check the elasticity of the springs along their length (in mm - right column) under a certain load (in kgf - left column), based on the following data: