Engines/Gearboxes/Compressors Complete overhaul and reconditioning of engines, gearboxes and air compressors is available. As Lock 3 is a machine shop I have the ability carryout machining as required in house and have 39 years experience in all types of overhaul. Aerzen Blower timing gear failure Aerzen Blower timing gear failure Aerzen Blower timing gear failure