The Multiquip EE54129 Radiator/CAC Assembly Cummins QSM11 Long Muffler is a genuine OEM cooling assembly designed for QSM11-powered Multiquip equipment. This assembly delivers direct, drop-in replacement performance, ensuring the cooling system operates exactly as the original equipment design specifies. Sourced directly through Multiquip's OEM supply chain, the part is the correct part for QSM11 applications requiring the long muffler configuration. Trust this assembly to restore full cooling system integrity and keep your machine running at its designed operating temperature.
Key Features
- Combined Cooling and Charge-Air Performance — Integrates both the radiator and charge-air cooler (CAC) in a single matched assembly, ensuring thermal and charge-air cooling are properly balanced for the Cummins QSM11 engine.
- Genuine OEM Construction — Built to Multiquip's original engineering specifications, with core materials and tank construction matched to the thermal load demands of the QSM11 platform.
- Long Muffler Configuration — Specifically engineered for the long muffler layout; installing the wrong configuration can cause clearance and mounting issues, making this designation critical for proper fitment.
- Direct Replacement for QSM11 Equipment — Confirmed fitment for Multiquip QSM11-powered machines, bolting into the existing mounting positions without rework or fabrication.
- Protects Engine From Thermal Overload — A compromised radiator or CAC on a high-output diesel like the QSM11 leads to elevated coolant temps, charge-air heat soak, derating, and accelerated engine wear; this assembly restores the full cooling margin the engine requires.
The radiator in this assembly dissipates heat from the engine coolant, keeping the Cummins QSM11 within its safe operating temperature range under load. The charge-air cooler (CAC) works in tandem by cooling the compressed intake air after the turbocharger, which increases air density, improves combustion efficiency, and reduces thermal stress on internal engine components. When either component degrades — through core damage, leaks, or fin blockage — the engine loses its ability to manage heat effectively, which on a high-output diesel like the QSM11 can rapidly lead to power derating, overheating shutdowns, and long-term damage to pistons, valves, and turbo seals.
Part Details
| Part Number | EE54129 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Radiator/CAC Assembly Cummins QSM11 Long Muffler |
Compatibility & Fitment
| Name | Model |
|---|---|
| QSM11 | QSM11 |
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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