The Wacker Neuson is a genuine OEM Fuel Return Hose Assembly 3/8" Ml T4I designed for the G100 and G120 Custom T4i portable generators. As a direct factory replacement, part is manufactured to the exact material and dimensional specifications of the original, ensuring a correct, leak-free connection within the fuel return circuit. This assembly fits both the G100 and G120 Custom T4i generator series, making it the right call whether you're servicing one unit or maintaining a fleet.
Key Features
- Genuine OEM Construction — Hose material and end fittings are built to Wacker Neuson's original specifications, delivering the correct pressure rating and fuel-chemical resistance for T4i generator fuel systems.
- Direct Drop-In Replacement — Sized at 3/8" with OEM-matched end connections, this hose assembly routes and attaches exactly as the original, requiring no trimming or adapter fitting.
- Confirmed G100 and G120 T4i Fitment — Verified for the G100 Custom T4i and G120 Custom T4i generator models, so you can order with confidence before the technician ever opens the service panel.
- Fuel Return Circuit Integrity — A correctly functioning return hose keeps excess fuel flowing back to the tank at the right rate. A cracked or deteriorated hose can cause fuel seepage, rough running, or hard starts.
- Fuel System Safety — A compromised fuel return line presents a fire and vapor hazard on any generator. Replacing with a genuine OEM hose assembly restores the sealed integrity of the fuel circuit and keeps the machine operating safely.
The fuel return hose assembly carries unused fuel from the engine's injection system back to the fuel tank, completing the closed-loop fuel circuit that keeps injection pressure stable and prevents vapor lock. On T4i-compliant engines, maintaining a fully sealed and correctly routed return line is especially important, as the emissions-tuned fuel system is sensitive to pressure inconsistencies caused by leaks or restrictions. When this hose degrades — through heat cycling, fuel exposure, or age — it can crack at the fittings or along the body, leading to fuel odor, engine hesitation, or visible leaks that demand immediate attention.
Part Details
| Part Number | 5200008637 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Fuel Return Hose Assembly 3/8" Ml T4I |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G100 Generator, Custom T4i | G100 | 5200003859 |
| G120 Generator,Custom T4i | G120 | 5200003856 |
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.
Wacker Neuson
Wacker Neuson 5200008638 Fuel Feed Hose Assembly 3/8" Ml T4I
