The Wacker Neuson Square Key is a genuine OEM component designed for the PT6LT, PT6LS, and PT6Y series 6-inch centrifugal trash pumps. Sourced directly from Wacker Neuson, this Square Key ensures an exact match to the original specification used on the pump drive assembly. It fits a broad range of PT6 configurations including trailer-mounted, skid-mounted, and EPA Tier 4 variants. If you're servicing any machine in the PT6 family, verifying part number against your serial number and model is the best way to confirm compatibility before ordering.
Key Features
- Genuine OEM Drive Engagement: — Manufactured to the same torque-transfer tolerances as the original, ensuring the impeller shaft seats and locks correctly without slipping under load.
- Drop-In Shaft Fit: — Sized to slot directly into the keyway on the PT6 pump shaft and mating component, requiring only standard hand tools for installation.
- Broad PT6 Family Coverage: — Confirmed fitment across PT6LT, PT6LS, PT6Y, PT6YT, and their Tier 4 / international variants, covering both trailer-mounted and skid-mounted configurations.
- Prevents Shaft Slip Under High-Volume Load: — A worn or missing square key allows the impeller to spin independently of the drive shaft, causing an immediate loss of pump output; replacing it restores full flow capacity.
- Small Part, Critical Function: — At this price point, keeping a spare 5000064017 on hand during pump service eliminates the risk of an extended outage over a single low-cost component.
A square key is a small, precisely dimensioned block of metal that locks a rotating shaft to a hub or impeller, transmitting torque between the two components by sitting in matching keyways cut into each surface. In a centrifugal trash pump like the PT6 series, the square key couples the engine-driven shaft to the pump impeller so that rotational power is transferred efficiently and without slippage. When the key shears, deforms, or goes missing, the impeller freewheels on the shaft and the pump loses its ability to move fluid — even though the engine continues to run normally — making it one of the first components to inspect whenever output pressure drops unexpectedly.
Part Details
| Part Number | 5000064017 |
|---|---|
| Old Part Number | 0064017 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Square Key |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PT6LT Pump w/Trailer | PT6LT | 5000007175, 5200014740 |
| 150mm/6in Centrifugal Trash Pu mp Skid Mounted | PT6LS | 5000007174, 5200014741 |
| PT6Y | PT6Y-SA | 5100070835 |
| PT6YT | PT6YT | 5100070966 |
| PUMP PT6Y-AU | PT6Y-AU | 5100076956 |
| PT6YT | PT6YT-IN | 5100077923 |
| PT 6LS | PT6LS(I) | 5200017427, 5200012427 |
| Trash Pump | PT6LT(I) | 5100014076 |
| PT6Y | PT6Y | 5100064168, 5100069617 |
| PT6Y | PT6Y EPA T4 | 5100073464 |
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.
