The Wacker Neuson Mechanical Seal Shaft Sleeve is a genuine OEM component designed for APT6S and APT6T series pumps, including standard, cold weather, surge brake, and electric brake configurations. As a direct OEM replacement, this part is manufactured to the exact material and dimensional standards required to maintain a leak-free seal interface in these high-flow trailer-mounted pump units. Whether you're servicing an APT6S Pump with Skid or an APT6T Pump with Electric Brake, part number ensures a correct, verified fit straight from the source. Keep your pump running at full capacity with the right part the first time.
Key Features
- OEM Material Integrity — Manufactured to Wacker Neuson's exact surface finish and hardness tolerances, ensuring the mechanical seal seats and rides correctly against the sleeve without premature wear or leakage.
- Drop-In Shaft Fitment — Sized to match the pump shaft diameter precisely, allowing the sleeve to install without modification against the existing mechanical seal assembly.
- Broad APT6 Series Coverage — Compatible with APT6S and APT6T pump models, including standard, cold weather, surge brake, and electric brake variants.
- Leak Prevention at the Seal Interface — A worn or scored shaft sleeve is a leading cause of mechanical seal failure and fluid bypass; replacing it restores proper sealing contact and protects the pump internals.
- Fluid Containment Compliance — In pump applications, a compromised shaft sleeve can result in uncontrolled fluid leakage; using a genuine OEM sleeve maintains the sealing system's integrity and supports safe operation.
The shaft sleeve is a hardened protective cylinder that fits over the pump shaft at the point where the mechanical seal makes contact. Its purpose is to give the seal a clean, wear-resistant running surface — protecting the shaft itself from scoring and erosion caused by seal friction and fluid exposure. When the sleeve becomes worn, grooved, or corroded, the mechanical seal can no longer maintain consistent contact pressure, leading to fluid leaks, seal failure, and potential damage to the pump shaft. Replacing a worn sleeve with a genuine OEM part like the 5200021647 restores the sealing system to its original operating condition.
Part Details
| Part Number | 5200021647 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Mechanical Seal Shaft Sleeve |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT6S Pump w/Skid | APT6S | 5200018982 |
| APT6T Pump, Surge Brake | APT6T | 5200019646, 5200019647 |
| APT6T Pump, Surge Brake, Cold Weather | APT6T CW | 5200019794, 5200019795 |
| APT6S Pump w/Skid, Cold Weather | APT6S CW | 5200019799 |
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.
