The Wacker Neuson Lock Nut is a genuine OEM component designed for the PT6LT and PT6LT(I) series self-priming centrifugal trash pumps. Sourced directly from Wacker Neuson, this lock nut meets the exact specifications required for correct assembly and secure fastening within these high-capacity pump platforms. Confirmed fitment includes the PT6LT Pump with Trailer, PT6LT Pump with Trailer T4, and PT6LT(I) Trash Pump configurations. Keeping critical fasteners to OEM specification ensures the integrity of the pump assembly under demanding worksite conditions.
Key Features
- Genuine OEM Fastener Integrity — Manufactured to Wacker Neuson's exact thread pitch and hardness spec, ensuring the lock nut seats and holds correctly within the pump assembly.
- Drop-In Replacement — Matches the original hardware profile exactly, threading directly into the existing fastener position without modification or rework.
- Confirmed Fitment — Compatible with PT6LT Pump with Trailer, PT6LT Pump with Trailer T4, and PT6LT(I) Trash Pump models.
- Vibration-Resistant Locking — Engineered to resist loosening under the continuous vibration generated during high-volume pump operation, maintaining secure clamping force over time.
- Critical Torque Retention — A failed or worn lock nut can allow fastened components to shift or separate; replacing with a genuine part restores the correct clamping load and prevents assembly movement.
A lock nut is a self-locking fastener engineered to resist loosening caused by vibration, torque, or dynamic loads — conditions that are constant during trash pump operation. Unlike a standard nut, a lock nut uses a deformed thread, nylon insert, or prevailing-torque feature to maintain clamping force even as the machine cycles through heavy use. When a lock nut wears, strips, or loses its locking action, the components it secures can shift, creating misalignment, leaks, or mechanical failure at the affected joint. Replacing it promptly with a correctly rated OEM part restores the fastener's holding strength and keeps the pump assembly properly secured.
Part Details
| Part Number | 5000077898 |
|---|---|
| Old Part Number | 0077898 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Nut |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PT6LT Pump w/Trailer | PT6LT | 5000007175, 5200014740 |
| Trash Pump | PT6LT(I) | 5100014076 |
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.
