The Wacker Neuson Oil Filler Cap Complete (Yellow) is a genuine OEM component designed for ML440 Light Towers and MG5 series Portable Generators. As a direct OEM replacement sourced through Wacker Neuson, this cap is manufactured to the same standards as the part originally installed at the factory — no guesswork on fit or material grade. The distinctive yellow color makes it easy to locate the oil filler point quickly during routine maintenance, reducing the chance of servicing errors in the field. Compatible across a wide range of ML440 and MG5 configurations, this is the correct part to specify when replacing a damaged, cracked, or missing oil filler cap on your machine.
Key Features
- OEM Sealing Integrity — Engineered to the original thread pitch and sealing surface spec, ensuring a secure, leak-free closure on the oil filler port.
- High-Visibility Yellow Finish — The yellow color identifies the oil filler point at a glance, supporting fast and accurate servicing during routine oil checks and changes.
- Direct OEM Replacement — Part number 5000404142 installs exactly as the original, with no modifications to the filler neck or surrounding components.
- Broad ML440 and MG5 Coverage — Fits multiple build variants of the ML440 Light Tower and MG5 Portable Generator series, making it a practical stock item for fleets running these machines.
- Protects Engine Oil from Contamination — A properly seated oil filler cap keeps dust, debris, and moisture out of the crankcase; a cracked or missing cap risks oil contamination and accelerated engine wear.
The oil filler cap seals the opening used to add engine oil to the crankcase. Its primary job is to prevent oil from splashing out during operation and to stop contaminants — dirt, water, and debris — from entering the engine oil system. When the cap is cracked, stripped, or missing entirely, the engine is left exposed to contamination that can degrade oil quality and damage internal components over time. Replacing a worn or damaged cap promptly with the correct OEM part is one of the simplest ways to protect engine longevity on your light tower or generator.
Part Details
| Part Number | 5000404142 |
|---|---|
| Old Part Number | 0404142 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Oil Filler Cap Complete (Yellow) |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Light Towers | ML440 | 5000630117, 5000630204, 5000630323, 5000630324, 5000630325, 5000630327 |
| Portable Generators | MG5 | 5000630137, 5000630143, 5000630233, 5000630254, 5000630224, 5000630229, 5000630237, 5000630239, 5000630252, 5000630308, 5000630310 |
| Portable Generators | MG5sd | 5000630202, 5000630214, 5000630236 |
| MG5 Generator | MG5d | 5000630211 |
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.
