This is how to replace a Wheel Hub, Wheel bearing, Hub assembly without banging on it with a sledge hammer and damaging your spindle or axle. The Torque settings for the Axle Nut is 155FT/LBS and the and the hub bolts are 85FT/LBS. You do not need to apply thread lock for this application.
https://www.gregsmithequipment.com/Shop/Air-Compressors – This instructional video shows a real person wiring a real magnetic starter attached to a real Atlas Air Compressor. There is nothing complicated about wiring your own air compressor.