The Wacker Neuson Rear Seal is a genuine OEM rear seal designed for the LTW8K, LTW20Z1, and LTW20Z3 series light towers. As a direct OEM replacement, part is manufactured to the same specifications as the original component, ensuring a correct, trouble-free installation. This seal is compatible across a broad range of LTW20Z1 and LTW20Z3 configurations, including Cold Weather T4, Custom T4, LED, MH, and Hertz variants, as well as the LTW8K light tower. Keeping the rear seal in good condition is essential to protecting the internal workings of the mast or drive assembly from contamination and fluid loss.
Key Features
- OEM-Grade Sealing Material — Manufactured to original material and compression specifications, ensuring a proper seal under the operating pressures and temperature cycles found on light tower mast systems.
- Drop-In Installation — Matches the original part geometry exactly, fitting into the same seat and bore as the factory seal for a straightforward swap with no machining or adaptation.
- Broad LTW Series Coverage — Fits LTW8K, LTW20Z1, and LTW20Z3 light towers across multiple configurations, including T4 Cold Weather, T4 Custom, LED, MH, and Hertz variants.
- Protects Internal Components — A functioning rear seal prevents dirt, moisture, and debris from entering the assembly, which directly extends the service life of surrounding bearings and mechanical components.
- Fluid Loss Prevention — Maintains proper fluid retention within the assembly; a worn or failed seal allows fluid to escape, leading to accelerated wear and potential component damage if left unaddressed.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, carrying the part number 394112642 for straightforward verification against your machine's parts manual.
The rear seal serves as a critical barrier within the mast or drive assembly of the light tower, preventing lubricant from escaping and blocking contaminants such as dust and moisture from entering the sealed cavity. When this seal is intact and properly seated, it preserves the lubrication film that protects moving internal components from metal-to-metal contact and premature wear. When the rear seal fails — typically showing as visible leaking, unusual noise from the assembly, or dry internal components — it should be replaced promptly to avoid secondary damage to bearings and adjacent parts.
Part Details
| Part Number | 394112642 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Rear Seal |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Light Towers | LTW20Z3 | 5200003583, 5200014327, 5200023604, 5200014329 |
| Light Tower | LTW20Z1 | 5200004205, 5100051572, 5100051571, 5200014326, 5200018239, 5200014328 |
| LTW8K-LIGHT TOWER,RFR | LTW8K | 5200004204 |
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.
