It then occurred to me that I had overlooked one of the simplest procedures and by doing so had confused at least one of the students.

The Sweep Test dynamically tests the harness and the peripheral components of an engine or brake control system.

Up until almost the middle of this century grease-soaked horsehair in a box oozed oil to lubricate those bearings, seeping gradually over the loaded surface and providing a sacrificial layer of lubricant to preserve the axle and the bearing race.