The Wacker Neuson Woodruff Key is a genuine OEM component designed for a broad range of Wacker Neuson equipment, including PTS4V centrifugal trash pumps, GPS9700 and GPS8500 portable generators, and the RD11V hydrostatic double drum vibratory roller. As a direct factory replacement, the is manufactured to the same tolerances and material specifications as the original part. This Woodruff Key ensures proper shaft-to-hub alignment and torque transfer, keeping driven components locked firmly in position during operation. Confirm your model number against the fitment list before ordering to ensure a correct, direct match.
Key Features
- Genuine OEM Material Spec — Manufactured to Wacker Neuson's original hardness and dimensional tolerances, ensuring the key seats correctly in its keyway without play or deformation under load.
- Correct Keyway Profile — The semi-circular Woodruff profile drops directly into the milled shaft slot, aligning the hub or pulley to the shaft without machining or fitting work.
- Wide Cross-Family Fitment — Covers PTS4V trash pump variants, GPS8500 and GPS9700 portable generators, GS8.5V and GS9.7V generators, and the RD11V roller — one part number across multiple machine families.
- Torque Transfer Integrity — A correctly installed Woodruff Key prevents rotational slippage between shaft and driven component, protecting impellers, pulleys, and rotors from misalignment wear.
- Safety-Critical Retention — In pump and generator applications, key failure can cause sudden loss of drive to the impeller or rotor; replacing a worn or sheared key restores secure mechanical coupling and prevents uncontrolled component movement.
A Woodruff Key is a small, semi-circular metal key that fits into a curved slot milled into a rotating shaft, with the flat side engaging a matching keyway in the hub, pulley, or impeller mounted on that shaft. Its job is to lock the two components together rotationally so that torque is transmitted from the shaft to the driven part without slippage. When a Woodruff Key shears, deforms, or works loose — often due to shock loads, overtorque, or normal wear — the shaft spins freely inside the hub, causing the driven component to lose power or stop entirely. Replacing the key promptly restores the mechanical connection and protects surrounding components from secondary damage caused by a spinning shaft contacting a stationary hub.
Part Details
| Part Number | 5000118511 |
|---|---|
| Old Part Number | 0118511 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Woodruff Key |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 100mm/4in Centrifugal Trash Pu mp | PTS4V | 5000007691, 5000007683, 5000620971, 5100031221 |
| Portable Generator with Electr ic Start | GPS9700 | 5000008287, 5000620264, 5200005042, 5000620973, 5100036768 |
| Portable Generator with Electr ic Start | GPS8500 | 5000008286 |
| Hydrostatic Double Drum Vibrat ory Roller | RD11V | 5000007694 |
| Portable Generator with Electr ic Start | GS8.5V | 5000007661 |
| Portable Generator with Electr ic Start | GS9.7V | 5000007662 |
| PTS4V(I) Pump | PTS4V(I) | 5000620972 |
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.
