The Wacker Neuson Lock Nut is a genuine OEM fastener designed for the HI 770 XHD indirect air heater series and the LTN6K-V, LTN6L-V, and LTN8K-V light tower series. As a direct OEM part, the is manufactured to the same specifications as the original hardware installed at the factory, ensuring a true drop-in fit with no guesswork. This lock nut serves as a critical fastening component across multiple Wacker Neuson climate and lighting products, making it a practical stocking item for fleet operators and service technicians who maintain these units in the field.
Key Features
- Genuine OEM Thread Integrity — Manufactured to exact thread-profile and torque-retention specifications, this lock nut holds secure under the vibration and thermal cycling common to both diesel heaters and generator-powered light towers.
- Direct Hardware Match — Replaces the original 5000178720 lock nut with no need for sizing adjustments or substitute hardware; the correct fastener for approved service procedures.
- Broad Fitment Across Two Product Families — Compatible with HI 770 XHD indirect air heaters (diesel, multiple configurations) and LTN6K-V, LTN6L-V, and LTN8K-V light towers, including standard, S-series, cold-weather, and Tier 4 Final variants.
- Locking Design Prevents Loosening — The lock nut's locking feature resists self-loosening caused by vibration, protecting the integrity of the assembly and preventing fastener-related service failures during extended operation.
- Essential Fastener for Preventive Maintenance Kits — A low-cost consumable that is often needed during scheduled service; keeping 5000178720 on hand avoids unnecessary equipment downtime waiting on a single hardware piece.
A lock nut is a fastener engineered to resist loosening under vibration, shock loads, and thermal expansion and contraction cycles. Unlike a standard nut, it incorporates a locking mechanism — such as a nylon insert, distorted thread, or prevailing-torque design — that maintains clamping force even when the assembly is subject to sustained movement or repeated temperature changes. In equipment like diesel indirect air heaters and generator-driven light towers, where engines and mechanical systems produce constant vibration, a failed or missing lock nut can allow connected components to shift, loosen, or separate, leading to misalignment or more serious mechanical faults. Using the correct OEM lock nut ensures the fastener performs as intended throughout the service life of the assembly.
Part Details
| Part Number | 5000178720 |
|---|---|
| Old Part Number | 0178720 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Nut |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 770 XHD Indirect Air Heater, Diesel, 2x12 | Arctic Bear XHD | 5000620676 |
| HI 770 XHD Indirect Air Heater, Diesel, 1x16 | HI770XHD | 5000620183, 5200003814, 5200004934, 5100049894 |
| HI770XHD Indirect Heater | Arctic Bear XHD NS | 5000620690 |
| LTN6K-V S, KUBOTA, 120/240V | LTN6K-V S | 5200018537, 5200018550, 5200018553, 5200023197 |
| LTN8K-V LIGHT TOWER,60HZ | LTN8K-V | 5200002727, 5200002728 |
| LTN6L-V LIGHT TOWER,50HZ | LTN6L-V | 5200002720, 5200002721 |
| LTN6K-V LIGHT TOWER,60HZ | LTN6K-V | 5200002722, 5200002726 |
| LTN6L-V S, KOHLER (LOMBARDINI) | LTN6L-V S | 5200018536, 5200018539, 5200018573, 5200018552, 5200023687, 5200023688, 5200023689, 5200018576 |
| LTN8K-V S, KUBOTA, 120/240V | LTN8K-V S | 5200018538, 5200018551, 5200018554, 5200023198 |
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.
