PEDAL ASSEM. 3J0354 - Caterpillar

The 3406B engine and the 3406C engine are direct fuel injected, in-line six cylinder four stroke engines. Each cylinder head has two inlet valves and two exhaust valves. The rocker arms and the valves are actuated by the camshaft. The action is performed by mechanical lifters and push rods.A full-range hydramechanical governor controls the fuel injection pump output, maintaining the engine rpm selected by the operator. Individual injection pumps (one for each cylinder) meter and pump fuel under high pressure to fuel injection nozzles. Automatic timing advance provides the best fuel injection timing over the full range of engine speed.To satisfy emissions regulations, an electronic governor is provided as standard equipment. The electronic governor works with the hydramechanical governor to provide isochronous speed control.The fuel ratio control is located on the governor. The fuel ratio control restricts the fuel rack movement. Only the proper amount of fuel is allowed to be injected into the cylinders during acceleration. This minimizes exhaust smoke.Emissions regulated engines are equipped with a protection group that discourages tampering with the fuel ratio control setting. Standard bolts have been replaced by tamper resistant bolts. This is required by emissions regulations.Inlet air is filtered by an air cleaner. The air is compressed by a turbocharger before the air enters the engine cylinders. The turbocharger is driven by engine exhaust. The standard engine is turbocharged, with jacket water aftercooling.The cooling system consists of:* a gear driven centrifugal pump* one water temperature regulator (thermostat) which regulates the engine coolant temperature* an oil cooler, and* a radiator (incorporating a shunt system).The engine lubricating oil, which is both cooled and filtered, is supplied by a gear-type pump. Bypass valves provide unrestricted flow of lubrication oil to the engine parts if oil viscosity is high, or if the oil cooler or the oil filter elements become plugged.Engine efficiency, efficiency of emission controls, and engine performance depend on adherence to proper operation and maintenance recommendations. Use the recommended fuels, lubrication oils, and coolants. Follow the recommended Maintenance Schedule found in this publication, paying attention to air cleaner, fuel system, lubrication system, and cooling system maintenance.Engine Specifications