Learning the care and service of drum brakes.
In this issue of Motor Age, our contributors have shared information on the intricacies of wheel speed sensors and the proper care and servicing of rear differentials and axles. My contribution this month is a discussion on the care and feeding of conventional drum brakes.
While not strictly meeting the criteria for our underhood segment, I felt it appropriate since much of what has already been shared is common to the rear half of the vehicle. Read more
We’ll start our tour of the alternator where it all starts in the alternator itself – at the alternator rotor. The rotor consists of a coil of wire wrapped around an iron core. Current through the wire coil – called “field” current – produces a magnetic field around the core. The strength of the field current determines the strength of the magnetic field. The field current is D/C, or direct current. In other words, the current flows in one direction only, and is supplied to the wire coil by a set of brushes and slip rings. The magnetic field produced has, as any magnet, a north and a south pole. The rotor is driven by the alternator pulley, rotating as the engine runs, hence the name “rotor.” Read more