The Wacker Neuson is a genuine OEM Mechanical Seal designed for PT3A, PT4A, PT3A(I), and PT4A(I) series self-priming centrifugal trash pumps. Sourced directly from Wacker Neuson, this part meets the exact material and dimensional standards of the original component installed at the factory. Fitment covers both standard and indirect-drive variants across the PT3A and PT4A families, making it the correct replacement for all listed configurations. Keep a spare on hand and you're never more than one part away from getting your pump back in service.
Key Features
- OEM-Grade Seal Face Materials — Manufactured to the original specification, ensuring correct face hardness, surface finish, and compression characteristics for a leak-free pump shaft interface.
- Drop-In Replacement for the Pump Shaft Housing — Engineered to the same bore and shaft diameter tolerances as the original, so the seal seats correctly in the pump housing without reworking or shimming.
- Confirmed Fitment Across PT3A and PT4A Families — Verified for PT3A, PT4A, PT3A(I), and PT4A(I) trash pumps, covering both standard and indirect-drive configurations within these series.
- Stops Shaft Leakage Before It Damages the Pump — A worn or failed mechanical seal allows water and abrasive slurry to migrate along the shaft, accelerating bearing wear and leading to costly pump failure if left unaddressed.
- Fluid Containment Integrity — On pumps handling dirty water, slurry, or chemically active fluids, a correctly seated mechanical seal is critical to preventing contamination ingress into the bearing cavity and maintaining safe operation.
The mechanical seal sits between the pump's wet end and its bearing housing, forming a dynamic, rotating seal around the impeller shaft. Its job is to prevent the pumped fluid from leaking out along the shaft while allowing the shaft to spin freely — a balance that depends on precise face contact and correct spring tension. When the seal wears, scoring, pitting, or swelling of the seal faces allows fluid to bypass the barrier, resulting in visible shaft leakage, bearing contamination, and ultimately a pump that can no longer maintain prime or flow.
Part Details
| Part Number | 5100044463 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Mechanical Seal |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PT3A | PT3A | 5100042216 |
| PT4A | PT4A | 5100042217, 5100042604 |
| PT3A(I) | PT3A(I) | 5100042614 |
| PT4A(I) | PT4A(I) | 5100042615 |
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.
