SENSOR GP-TEMPERATURE 1520649 - Caterpillar

3114 And 3116 Engines Equipped With A TurbochargerDuring cold weather conditions, an Ether starting aid provides improved startability. However, some customers prefer not to use Ether until temperatures become extremely cold.
As an alternative on-board starting aid, Caterpillar has released an Air Inlet Heater (AIH) that is adaptable to most 3114T and 3116T applications (except 446 Backhoe Loaders, due to the high-mounted turbocharger).
The AIH System parts for 3114 and 3116 Engines with aftercoolers are not available at this time. The parts listed in this article apply only to turbocharged engines without aftercoolers.The AIH Sytem has a battery-powered heating element (Heater Assembly) mounted in the air inlet system between the turbocharger and the inlet manifold. The heater is powered by the same batteries used for the electric starting motor. A relay (switch) is used to turn on the power to the heater. The heater is grounded to the engine which is grounded to the frame and battery by the starter. The operator controls operation of the AIH System manually using a push-button switch to activate the power relay. An indicator lamp is recommended to visually alert the operator when the AIH System is activated. The AIH heater must be preheated up to 30 seconds before engine cranking. When the engine is cranked, air flowing past the heater element is warmed. The warm air entering the combustion chamber helps the engine start more quickly with less cranking time, and run more smoothly when it starts. In addition to preheating the element, the AIH can be used during cranking, and after starting for up to 3 minutes to help the engine run more smoothly and reduce white smoke. Normally, the battery power used for preheating is less than the additional battery power that would be needed for longer cranking time if the AIH were not used in cold weather.
Never exceed 30 seconds preheat. The heater uses 90 to 100 amperes of DC current. Preheating longer than 30 seconds with no air flow may overheat the power connections or the heater element.Parts required depend upon the engine configuration and system voltage (either 12V or 24V). There are four basic engine configurations, depending upon the turbocharger orientation. The configuration must be determined before ordering parts. The exhaust direction listed means the direction of exhaust exiting the turbocharger, either rearward toward the flywheel housing, or forward toward the front of the engine:
*3114T with Exhaust-to-Rear (910E, IT12B, IT14B, E110B, E120B)*3114T with Exhaust-to-Front (918F, IT18F, 205F, 206B, 211B, 212B, CB434, RT80, RT100)*3116T with Exhaust-to-Rear [120H, 135H, E200B, E240B, 320 (with 3116), 613C Series II]*3116T with Exhaust-to-Front (928F, ITF28F, 950F, 953B Series II, 213B, 214B, 224B, AP1050, CS/CP563) Connect ground strap to heater and to threaded hole in cylinder head, near top row of exhaust manifold bolts.A general schematic diagram is provided for guidance in wiring the AIH System. However, due to differences in wiring of various applications, it is impossible to provide specific instructions for individual engine applications and machine models. It is the dealer's