BLOCK 1467118 - Caterpillar

General Information
3208 ENGINE WITH EXHAUST GAS RECIRCULATION (EGR)
1. EGR switch. 2. Fumes disposal tube. 3. Breather. 4. Air inlet manifold. 5. Cover for EGR actuator. 6. EGR valve. 7. EGR tube.The Low Emission 3208 Engine with Exhaust Gas Recirculation (EGR) is a 3208 Engine with modifications to meet low emissions standards. It will supply 200 BHP at 2800 rpm.When an engine is first started and until it reaches the normal temperature for operation, there is an incomplete (not complete) burning of the fuel. This results in a large amount of smoke. In Exhaust Gas Recirculation (EGR), some of the exhaust gas is sent back to the inlet manifold to be burned again. At low load there is maximum EGR. As the engine load is increased, the amount of EGR becomes less. At full load, there is no EGR.The fuel injection pump of the 3208 Engine with EGR has a different load stop pin with an EGR switch and cover assembly installed on it. The load stop pin will open or close an electrical circuit in the switch and cover assembly. This switch controls the operation of two solenoids. The solenoids control the flow of pressure oil through two lines from the oil cooler to the EGR actuator. There is a drain line from the actuator to the oil pan. The pressure oil to the actuator works against pistons in the actuator to control the position of a rod in the actuator.
EXHAUST GAS RECIRCULATION (EGR) ACTUATOR AND VALVE
6. EGR valve. 7. EGR tube. 8. Shaft. 9. Pressure oil lines (two). 10. Lever. 11. Rod. 12. EGR actuator. 13. Solenoids (two). 14. Oil drain line.The EGR valve is installed on the exhaust manifold. The rod from the actuator works through a link and lever on the shaft of the EGR valve. The shaft works a baffle type mechanism which controls how much exhaust gas goes out through the exhaust and how much goes to the air inlet manifold. When EGR takes place, some of the air in the inlet manifold is replaced by exhaust gas.The 3208 Engine with EGR does not use a PCV valve. It has a breather on the valve cover. The 3208 Engine with EGR also has a a 3° automatic timing advance instead of the normal 5° automatic timing advance.The design of the EGR system is made so that if there are any problems with it, full EGR will be in effect. With full EGR in effect, the engine will not make full power. There will be more smoke. If it is necessary, the engine can be run with full EGR in effect. If the engine is run when there is a problem (malfunction) with the EGR system, be sure to drain the oil from the engine after the problem (malfunction) has been corrected. Install new oil filters and put new oil in the engine.EGR Systems
EGR Switch And Cover Assembly
EGR SWITCH AND COVER ASSEMBLY
1. EGR switch cover. 2. Fuel setting screw. 3. Wire. 4. Bullet