Heavy-Duty Hydraulic Pump Couplings & Flywheel Drive Plates

If your machine is experiencing unusual vibrations or a total loss of hydraulic drive, a worn replacement pump coupling is often the cause. As the critical link between your engine’s flywheel and the hydraulic main pump, a high-durability flexible coupling absorbs shock loads and corrects minor misalignments to prevent catastrophic damage to your pump shaft. BeeSpareParts stocks a wide range of nylon, rubber, and steel couplings designed for high-torque industrial applications.

Coupling failure is frequently a sign of engine or pump mounting issues. To ensure a long-lasting repair, we recommend checking your for sagging, or browsing our if your pump has suffered shaft damage from a broken coupling. Our coupling assemblies feature heat-resistant elements and precision-splined hubs, offering a cost-effective alternative to expensive original equipment manufacturer (OEM) parts.

Whether you need a CF-H or AS series coupling for an excavator, a generator drive plate, or a nylon sleeve coupling, our parts are factory-tested for balance and fit, and are ready for fast international shipping. Protect your drivetrain and restore smooth power—order your heavy-duty coupling solution today.

Fits for:

• Engine & Model Series: 4BT, 6BT, 4D95, 6D102, S6K, S4K, 3TNV88, 4TNV94, 4TNV98.

• Equipment Models: ZX, PC, SK, EC, EX series excavators, mini-diggers, and stationary power units.