Understanding and Maintaining Your SCR System

Keep Your Rig Running Clean

That Selective Catalytic Reduction (SCR) is key to keeping your truck legal and cutting down on nasty exhaust fumes. Think of it as a vital part of the cleanup crew for your engine. But let's be honest, these SCR systems can be a pain in the neck when they act up.

This article outlines the top ways to keep your SCR system in good shape so your truck runs smoothly and you avoid headaches. The bottom line is that looking after your SCR saves you money down the road.

What's the Deal with SCRs?

Selective Catalytic Reduction is a system that tackles those nitrogen oxide (NOx) emissions coming from your diesel engine. It works by injecting diesel exhaust fluid (DEF) into the exhaust. This DEF reacts with the NOx, turning it into harmless nitrogen and water.

The SCR system uses a catalyst – made with pricey metals like platinum and palladium – to make this reaction happen. Over time, this catalyst can get gunked up or damaged. This "catalyst poisoning" messes with how well the SCR works, leading to more emissions. Regular checks and cleaning are your best bet to avoid this.

Proper upkeep also stops other problems like stress from extreme hot and cold, blockages, and leaks. Stick to our maintenance tips, and you'll help your SCR system do its job properly, keeping emissions down.

Common SCR Problems in Big Trucks

Even though SCRs are built to last, they can still run into issues. Here are some common ones you might see:

• Catalyst Poisoning: Like we said, this happens when stuff like oil, antifreeze, or the wrong DEF gets in there and messes with the catalyst.
• Heat Stress: Big temperature swings can damage the catalyst and make the system less effective.
• Blockages: Soot and other particles can build up and clog the system, reducing its efficiency and increasing emissions.
• Leaks: Over time, the system can develop leaks, which hurts performance and can lead to expensive fixes.

Following our maintenance advice and scheduling regular inspections will help you steer clear of these problems and keep your SCR running as it should.

How to Keep Your SCR System In Great Shape

Looking after your Selective Catalytic Reduction system properly is crucial for good performance and cleaner emissions. Here’s what you need to do:

• Use Good DEF: Don't cheap out on DEF. Make sure it meets the manufacturer's specs and isn't old or contaminated. Keep an eye on the DEF level and top it up when needed. Running empty can shut down the system and cost you big time.
• Regular Checkups and Cleaning: Get your SCR system inspected and cleaned regularly to prevent blockages and reduce the chance of costly repairs. Follow the manufacturer's guidelines for this. Also, keep an eye out for leaks and fix them ASAP to prevent further damage.
• Stick to the Schedule: Follow the maintenance schedule recommended by the manufacturer for your whole aftertreatment system, including the SCR. This helps prevent problems and saves you money in the long run. This also includes looking after your diesel particulate filter (DPF) and other parts of the system. By taking care of the whole aftertreatment system, you ensure your truck runs efficiently and meets those emissions rules. Adding this maintenance to your regular truck care routine will keep your SCR working its best and cutting down on pollution.