The Multiquip 6004216640 Thermostat SA6D140A DCA400SPK UP is a genuine OEM component designed for the DCA400SPK ultra-silent diesel generator series. As a direct OEM replacement, this thermostat is sourced to the exact specification required by the SA6D140A engine platform, ensuring it seats and functions correctly within the factory cooling circuit. DHS Equipment supplies this part as an authorized Multiquip replacement, giving you confidence in fitment accuracy for DCA400SPK applications.
Key Features
- OEM-Spec Temperature Regulation: — Engineered to open and close at the precise coolant temperature threshold required by the SA6D140A engine, preventing overcooling or overheating during load cycles.
- Direct Drop-In Fitment: — Matches the original housing dimensions and sealing surfaces of the DCA400SPK cooling system, allowing straightforward installation without modification to plumbing or mounting points.
- DCA400SPK Series Compatibility: — Confirmed fitment for DCA400SPK ultra-silent diesel generators equipped with the SA6D140A engine block.
- Protects Engine Longevity: — A properly functioning thermostat keeps the engine operating within its optimal thermal range, reducing wear on cylinder walls, seals, and bearings that occurs when coolant temperature runs too low or too high.
- Critical Cooling System Compliance: — In generator applications running under sustained load, thermostat failure can trigger thermal shutdowns or cause undetected overheating; replacing with a genuine OEM unit maintains the integrity of the engine protection system.
The thermostat is the gatekeeper of the engine cooling circuit. It remains closed when the engine is cold, allowing coolant to recirculate internally so the engine reaches operating temperature quickly and efficiently. Once the coolant hits the correct threshold, the thermostat opens and allows flow through the radiator to shed excess heat. A failed or stuck thermostat — whether stuck open or closed — disrupts this balance, either keeping the engine chronically under-temperature and causing fuel wash and bore glazing, or blocking coolant flow entirely and leading to rapid overheating. On a high-output diesel generator like the DCA400SPK, where sustained full-load operation is common, a correctly functioning thermostat is essential to protecting the SA6D140A engine.
For questions about fitment or to confirm this is the correct part for your DCA400SPK, contact the DHS Equipment parts team before ordering.
Part Details
| Part Number | 6004216640 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Thermostat SA6D140A DCA400SPK UP |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diesel Powered Generators | DCA400SPK |
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.
