The Multiquip D5311500203 Upper Radiator Hose is a genuine OEM component designed for the DLW400ES series diesel light welder/generators. As a factory-sourced part, D5311500203 is manufactured to the same specifications as the original, ensuring a proper connection between the engine and radiator without fitment issues. This hose is confirmed for use on DLW400ES, DLW400ESA, and DLW400ESA1 models, making it the correct choice when servicing cooling system components on these units. Sourcing the right OEM hose the first time keeps your cooling system operating within spec and your equipment back on the job quickly.
Key Features
- Genuine OEM Construction — Manufactured to the exact material grade and wall thickness of the original hose, ensuring proper coolant flow and pressure retention specific to the DLW400ES cooling circuit.
- Direct-Fit Installation — Molded to match the original routing path and end dimensions, connecting to the engine and radiator ports without trimming or adapting.
- Confirmed DLW400ES Series Fitment — Verified for DLW400ES, DLW400ESA, and DLW400ESA1 diesel light welder/generator models.
- Maintains Cooling System Integrity — A correctly fitted upper radiator hose sustains proper coolant circulation, preventing overheating that can cause engine damage and unplanned shutdowns during welding operations.
- Fuel System and Heat Resistance — Built to withstand the sustained operating temperatures of a diesel-powered welder/generator, resisting softening, cracking, and premature wear under continuous load.
The upper radiator hose carries heated coolant from the engine's outlet port to the top of the radiator, where the heat is dissipated before the cooled fluid returns to the engine. On a diesel welder/generator like the DLW400ES, this hose operates under consistent thermal and pressure cycling, making its material integrity critical to stable engine temperatures. When the hose cracks, softens, or loses its seal at either end, coolant loss occurs rapidly, leading to overheating and potential engine damage if the unit is not shut down immediately.
Part Details
| Part Number | D5311500203 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Upper Radiator Hose |
Compatibility & Fitment
| Name | Model |
|---|---|
| Welders | DLW400ES |
| Welders | DLW400ESA |
| Welders | DLW400ESA1 |
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.
