The Wacker Neuson Lock Nut is a genuine OEM component designed for PT6LT series trash pumps and the HIF 600 Flameless Air Heater. As a direct OEM replacement, this lock nut is sourced from Wacker Neuson and matches the exact thread specification, dimensions, and material grade of the original part. Fitment covers the PT6LT Pump with Trailer, PT6LT Pump with Trailer T4, PT6LT(I) Trash Pump, and the HIF 600 Flameless Air Heater. Using the correct OEM lock nut ensures secure fastening without the risk of backing out, stripping, or loosening under vibration and load.
Key Features
- OEM-Grade Locking Integrity — Manufactured to the original thread class and hardness specification, this lock nut maintains clamping force under the sustained vibration typical of high-capacity trash pump and heating equipment operation.
- Drop-In Replacement — Threaded to match the original fastener position exactly, allowing straightforward installation without re-tapping or chasing threads.
- Broad Series Fitment — Confirmed for the PT6LT Pump with Trailer, PT6LT Pump with Trailer T4, PT6LT(I) Trash Pump, and HIF 600 Flameless Air Heater — one part number covering multiple platforms.
- Vibration-Resistant Fastening — A failed or missing lock nut on a trash pump or air heater can allow critical assemblies to work loose during operation; the 5000077917 restores the designed resistance to self-loosening.
- Genuine Wacker Neuson OEM Part — Supplied directly through the Wacker Neuson parts chain, ensuring the part number, thread form, and material are verified against the original equipment specification.
A lock nut is a fastener engineered to resist loosening when subjected to vibration, torque, and cyclical loading — conditions that are constant on self-priming trash pumps and indirect-fired or flameless air heaters running for extended periods. Unlike a standard nut, a lock nut incorporates a locking feature — such as a deformed thread, nylon insert, or prevailing-torque design — that maintains clamping load even as the assembly flexes or vibrates. When a lock nut fails or goes missing, the fastened joint can progressively loosen, leading to misalignment, leaks, or component separation that takes equipment out of service.
Part Details
| Part Number | 5000077917 |
|---|---|
| Old Part Number | 0077917 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Nut |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PT6LT Pump w/Trailer | PT6LT | 5000007175, 5200014740 |
| HIF 600 Flameless Air Heater | HIF600 | 5200017593 |
| 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.
