The Wacker Neuson Piston Pin Clip is a genuine OEM component designed for the ML440 Light Tower and MG5 series Portable Generators. Sourced directly from Wacker Neuson, this clip meets the same specifications as the part originally installed at the factory, ensuring a correct, trouble-free fit every time. It is confirmed compatible across a wide range of ML440 and MG5 configurations, including MG5, MG5d, and MG5sd variants. When your current clip is worn, damaged, or lost during service, replacing it with the genuine keeps your engine assembly operating as intended.
Key Features
- Genuine OEM Retention Integrity — Manufactured to Wacker Neuson's exact dimensional tolerances, ensuring the piston pin is held securely without play or drift under engine load.
- Drop-In Engine Installation — Designed to seat directly into the piston pin bore groove with no reworking of surrounding components required during reassembly.
- Broad ML440 and MG5 Series Coverage — Fits multiple ML440 Light Tower configurations and the full MG5, MG5d, and MG5sd Portable Generator lineup across numerous build variants.
- Protects Piston and Cylinder Wall — A correctly seated piston pin clip prevents lateral pin migration that would otherwise score the cylinder bore and damage the piston, leading to costly internal engine repairs.
- Critical Engine Safety Component — Piston pin retention is a load-bearing engine function; using the correct OEM clip rated for this application prevents catastrophic internal failure during operation.
The piston pin clip — sometimes called a circlip or snap ring — is a small but essential retaining fastener that locks the piston pin (wrist pin) in position within the piston. The piston pin connects the piston to the connecting rod, and the clip prevents the pin from walking sideways into the cylinder wall during the rapid reciprocating motion of the engine. If this clip is missing, incorrectly seated, or fatigued, the piston pin can shift laterally and cause severe scoring of the cylinder bore, piston damage, or complete engine seizure. Replacing a worn or damaged clip at service intervals is one of the most cost-effective ways to protect the long-term health of the engine.
Part Details
| Part Number | 5000404856 |
|---|---|
| Old Part Number | 0404856 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston Pin Clip |
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, 5000630334 |
| 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.
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