Mechanical repairs to machines, gearboxes, and hydraulic systems; dismantling of equipment using specialized tools; and the fabrication of replacement parts that are no longer available, using metals and plastics. Therefore, when removing parts, don't just discard them; try to obtain original replacement parts. If you can't find any, you've come to the right place. Bring the defective parts and/or the entire device or machine with you, or I can come to your location for inspection and measurements. Photos will help in assessing the situation.