For Cummins 6C8.3 QSL9 L9 ISC8.3 diesel engine Hydraulic Pump Adapter 3939963. Product Name:diesel engine Hydraulic Pump Adapter. For Cummins 6C8.3 QSL9 L9 ISC8.3. Product Number: 3939963 3936224 3923321 3910655 3903106. If you find any dissatisfaction or questions during the shopping process, please contact our merchants at the first time. Please rest assured that we will handle your feedback with a positive attitude and professionalism! (excluding weekends and holidays). Please confirm your valid address before placing an order. The global standard arrives in about 7-15 days. When you receive our products, we value your feedback on your experience. If you find any dissatisfaction in the process of using the product, please contact our merchant at the first time. Please be assured that we will handle your feedback with a positive attitude and professional action. It is vital that you communicate with us before you feel dissatisfied.