Cooled Exhaust Gas Recirculation System Components
EGR Cooler – Mixes fresh air with exhaust gas to lower the combustion temperature to ensure NOx is in compliance with emissions regulations
Exhaust Filter – The diesel particulate filter traps particulate matter to prevent it from being released into the atmosphere in order to comply with emissions regulations
Exhaust – N2 and CO2 are emitted from the exhaust. Both are harmless gases
Diesel Particulate Filter Tips
At full throttle the engine burns cleaner, and the DPF is most efficient
The DPF should be changed every 3,000-3,500 hours, or based upon manufacturer recommendations
The DPF is usually placed in a convenient location that affords easy access when service is required
The regeneration process cleans the DPF while it is still on the machine
Most DPF machines require low ash CJ-4 engine oil
Only low sulfur oil should be used with a DPF
SCR
Selective Catalytic Reduction System Components
Engine exhaust – Particulates are burned off at a combustion temperature of 392° to remain compliant with emissions regulations
Injection – Before the exhaust enters the SCR Catalyst, DEF solution is injected
NOx and DEF react – The chemicals in the DEF combines with the NOx in the SCR catalyst
Harmless emissions – N2 and H20, both harmless gases, are released from the exhaust
Diesel Exhaust Fluid Tips
Check DEF levels when you refuel or service your machine
On most equipment that uses DEF, a level indicator gauge will tell you when it’s time to refill
If the DEF tank contains less than 5% of its capacity, the engine power will de-rate
Ensure your DEF is of high quality, and all containers used to handle it are clean
DEF tanks will hold between 15 and 50 gallons, depending on the equipment size and horsepower
Protect your DEF from any contaminants including fuel, oil, grease, water, dust, dirt, metal or detergent
