PREGLOW System

The pencil element glow plugs are comprised of a housing with screw-in threads. The pencil element glow plugs require 11.5 volts and operate as a parallel circuit.

The heating element consists of a heating and control winding connected in series. When glow system is on, a current of about 30 amps will flow to each glow plug.

The winding increases resistance with increasing temperature and limits current to approximately 8-15 amps. This protects glow plugs against overload. After a glow time of 9 seconds, a heater bar temperature of approximately 1500°F (900°C) will be attained.