Freightliner Cascadia DEF Pump Replacement | Step-by-Step Guide

Is your DEF system leaking or throwing fault codes on your Freightliner Cascadia? 🚛 In this video, Steve with LRM shows you step-by-step how to replace a DEF pump (and when you can get away with just replacing the filter instead). What you’ll learn in this video: ✔️ Signs of a bad DEF pump vs a bad filter ✔️ How to safely drain coolant before replacement ✔️ Removing and reinstalling coolant + DEF lines without breaking clips ✔️ Electrical connection tips (without damaging plugs) ✔️ How to test for leaks after installation ✔️ Cost breakdown: pump ($900–$1200), filter ($100–$200), DEF lines ($30–$70) 💡 Pro Tip: Don’t just replace the whole pump if it’s only the filter or a cracked DEF line—it could save you hundreds of dollars. Tools You’ll Need: 🔧 13mm socket + wrench 🔧 Crescent wrench 🔧 Flathead screwdriver 🪣 Three 5-gallon buckets (for coolant) 👍 If this video saves you money, hit LIKE, drop a comment if you have questions, and SUBSCRIBE for more DIY semi-truck repair content. #FreightlinerCascadia #TruckRepairDIY #DEFSystem #OwnerOperatorTips #SemiTruckRepair --- For more information on leasing a truck visit: http://www.lrmleasing.com (954) 791-1400   / lrmleasing   Amazon Associate links: Tire tread depth gauge qty 2- https://amzn.to/3supY5N Fifth wheel puller- https://amzn.to/3YXNhBa Truck air duster blow gun- https://amzn.to/3YXNhBa Tool Roll (bag only)- https://amzn.to/45EVooR Heavy Duty Diagnostic Scanner- https://amzn.to/3rt0Z2u Gear wrench set: https://amzn.to/44yXwNb Long nose needle pliers: https://amzn.to/41YC5FX Heavy duty circuit test light: https://amzn.to/3tW3wU4 For over 35 years, LRM Leasing has been offering a best in class NO CREDIT CHECK lease program. At LRM Leasing you can work for any carrier in the United States with no mileage limitations whatsoever. Many other companies will require you to work for specific carriers, at LRM Leasing, you choose who you want to work for. When you lease a truck from LRM Leasing you will have all the benefits of ownership. You can expect a simple no nonsense experience. Our friendly staff is ready to walk you through all your options and answer any questions you might have along the way.