BRACKET 2336144 - Caterpillar

The 1693 Diesel Truck Engine is an 893 cu. in. (14,6 ltr.) displacement, 4 stroke cycle, 6 cylinder turbocharged engine and is available either aftercooled or non-aftercooled. This overhead cam engine with a 4 valve per cylinder design is made especially for highway trucks hauling big payloads. Serviceability is featured by spin-on throw away fuel filters, easy valve adjustment replacement cylinder liners and valve seats and piston and rod removal from the top.Individual injection pumps, one for each cylinder, meter and pump fuel under high pressure to an injection valve and a precombustion chamber for each cylinder. An automatic variable timing device advances or retards fuel injection and is regulated by engine speed. The faster the engine turns the earlier the injection must take place before piston top center on the compression stroke.A hydro-mechanical governor controls the fuel injection pump output to maintain the engine RPM selected by the operator. A speed limiting device, built into the governor, limits engine speed until engine oil pressure builds up.The air-fuel ratio control located on the governor is a device which restricts the movement of the fuel rack, allowing only a certain amount of fuel to be injected into the cylinders during acceleration, to minimize exhaust smoke.Inlet air, filtered by an air cleaner, is compressed by a turbocharger before entering the engine cylinders. The turbocharger is driven by the engine exhaust.There are four in-head valves (two inlet and two exhaust) for each cylinder. Two overhead camshafts are located in a housing on top of the cylinder head. Camshaft followers transmit movement of the camshaft lobes directly to the valve stems. The timing gears are located at the rear of the engine.The engine coolant is used to cool the engine lubricating oil. Two full-flow temperature regulators in the regulator housing at the front of the engine, provide for quick engine warm-up, and allow free circulation of coolant after operating temperature has been reached.Lubrication for the engine is supplied by a gear-type pump. The pump provides full pressure lubrication to the engine internal and external parts.The lubricating oil is both cooled and filtered. By-pass valves provide unrestricted flow of lubrication oil to the engine parts when oil viscosity is high or, if either the oil cooler or the oil filter elements should become clogged.The starting system is direct electric and uses a 24 volt starting motor.Efficiency of emission controls and engine performance depends on adherence to proper operation and maintenance recommendations, and use of recommended fuels and lubrication oils. Major adjustments and repair should be entrusted to your authorized dealer. Follow the recommended maintenance schedule with special emphasis on fuel injection nozzles, air cleaner, air-fuel ratio control and high and low idle adjustment. Air-fuel ratio control and the high and low idle adjustments should be made by an authorized dealer.