The Wacker Neuson Mechanical Seal is a genuine OEM mechanical seal designed for the PS4-7503HH, PS4-7503HF, PS4-11003HH, and PS4-11003HF series submersible pumps. As a factory-sourced component, it is manufactured to the exact material and dimensional specifications Wacker Neuson requires for proper pump operation. This seal is confirmed to fit across multiple voltage and frequency configurations within the PS4 submersible pump family, covering both high-head and high-output variants. If your pump is showing signs of fluid leakage around the motor housing, the is the correct OEM replacement to restore the integrity of the seal assembly.
Key Features
- OEM-Grade Seal Material — Manufactured to Wacker Neuson's specified compression and material standards, ensuring the seal faces mate correctly and resist the abrasive, water-laden conditions typical in submersible pump applications.
- Direct Drop-In Replacement — Engineered to seat into the existing seal cavity without reworking the housing, maintaining the correct shaft clearance and face contact pressure on installation.
- Broad PS4 Series Compatibility — Fits PS4-7503HH, PS4-7503HF, PS4-11003HH, and PS4-11003HF submersible pumps across 220V/60Hz, 440V/60Hz, and 400V/50Hz configurations.
- Stops Shaft Leakage at the Source — A functioning mechanical seal prevents water from migrating along the pump shaft into the motor cavity. A worn or damaged seal leads to motor flooding and premature failure.
- Genuine Wacker Neuson Part — Sourced directly through the Wacker Neuson OEM supply chain, so you can be confident the part number 5100028520 matches the assembly it replaces.
A mechanical seal is the primary barrier between the pump's wet end and the motor housing in a submersible pump. It works by pressing two precision-lapped faces — one rotating with the shaft, one stationary — together to create a near-zero-leakage interface. When this seal degrades through wear, corrosion, or running dry, water enters the motor housing, leading to winding damage and full pump failure. Replacing the mechanical seal at the first sign of leakage is one of the most cost-effective ways to extend the working life of a submersible pump.
Part Details
| Part Number | 5100028520 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Mechanical Seal |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PS4-7503HH | PS47503HH | 5000008856, 5000008857, 5000009147, 5000009148 |
| PS4-7503HF | PS47503HF | 5000008862, 5000008863, 5000009206 |
| PS4-11003HH | PS411003HH | 5000008868, 5000008876, 5000009153, 5000009154, 5000009208 |
| PS4-1003HF | PS411003HF | 5000008872, 5000008878, 5000009210 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
