Custom Cargo Tank Upper Coupler Rebuilds & Replacements
Built Tough, Cut to Size, and Welded Right Here in Bismarck
The fifth-wheel box (upper coupler) takes the worst beating on the road. Between heavy loads, constant twisting, and North Dakota winters, they eventually rust out, crack, or thin down. When a trailer box is too far gone to patch, our shop cuts out the rotted metal and installs a brand-new assembly built specifically for your trailer setup.
Standardized Measurement Forms: We don’t guess when it comes to trailer frames. We send you a simple measurement sheet to fill out with your exact specs so our guys build it right the first time.
In-House Cutting & Welding: Our fab shop handles the entire process right here on our shop floor. We cleanly remove the old assembly and precision-weld the new one to match your trailer framework perfectly
Heavy-Duty Steel Plate: We use premium, thick plate steel that stands up to heavy loading and lasts way longer than factory shells.
No Out-of-State Shipping Fees: Skip the high freight costs and long factory wait times. We source the metal, form it, cut it, and weld it right here on Yegen Road.
Time to Rebuild Your Assembly? Call our Bismarck shop directly at 701.258.5427 to grab our measurement form, check current metal prices, or schedule a time to drop off your trailer.
