Professional rebuild service for your Ford 4000 tractor Stanadyne/Roosa Master injection pump, model DBGVCC429-7AJ. Stanadyne/Roosa Master rotary pumps were commonly used on Ford diesel tractors, including many Ford 4000 applications. Ultrasonic cleaning of components. Replacement of seals, O-rings, gaskets, and wear items as needed. Inspection of head & rotor assembly. Governor inspection and adjustment. Calibration and bench testing. Common Symptoms We Repair. No-start conditions caused by internal pump wear. Sticking metering valve or governor issues. Ford 4000 diesel tractors. Stanadyne / Roosa Master DBGVCC429-7AJ pumps. How the Service Works. We inspect and rebuild the pump. Pump is calibrated and tested on a certified test stand. This listing is for a rebuild service only. You are not purchasing an injection pump. Additional charges may apply if major hard parts are damaged, missing, seized, or require replacement. Turnaround time typically depends on pump condition and parts availability. Similar rebuild services commonly note that severe damage may increase repair costs. What We Need From You. Pump model number (DBGVCC429-7AJ). Tractor model and serial number. Description of operating issues. Restore the performance and reliability of your Ford 4000 diesel tractor with a professionally rebuilt Stanadyne DBGVCC429-7AJ injection pump.