The Multiquip 521604 is a genuine OEM Hatz 74.5 HP T4F Engine designed for MQ600H, MQ600HTB, and MQ600HTP trash pumps. As a direct OEM replacement sourced from Multiquip, this engine meets the same specifications as the unit installed at the factory, ensuring your pump operates exactly as intended. Fitment is confirmed for the MQ600H series, making this the correct choice when a full engine replacement is required. DHS Equipment supplies this part as an authorized Multiquip dealer, so you can order with confidence knowing you are receiving an authentic component.
Key Features
- Tier 4 Final Emissions Compliance: — The Hatz T4F engine meets EPA Tier 4 Final emissions requirements, keeping your equipment legally compliant on regulated jobsites and government contracts.
- 74.5 HP Hatz Diesel Power: — Delivers the rated output your MQ600H pump was engineered around, maintaining full pumping capacity and flow performance under demanding load conditions.
- Genuine OEM Component: — Part 521604 is a factory-authentic Multiquip replacement, built to the same tolerances and configuration as the original engine — no guesswork on fitment or compatibility.
- Confirmed MQ600H Series Fitment: — Verified for MQ600H, MQ600HTB, and MQ600HTP trash pumps, so you can proceed with replacement without cross-referencing alternate part numbers.
- Complete Engine Assembly: — Supplied as a complete engine unit, simplifying the replacement process and reducing the risk of incomplete repairs from sourcing individual sub-components separately.
The engine is the core power source of a diesel-driven trash pump, converting fuel into the rotational force needed to drive the pump impeller and move high-volume, debris-laden water. On a unit like the MQ600H, the engine must sustain consistent output under continuous heavy-duty pumping cycles — any loss of power, oil pressure, or compression directly reduces pumping performance and can halt operations entirely. When an engine reaches the end of its service life or suffers a catastrophic failure, replacing it with the correct OEM unit like the Multiquip 521604 restores the pump to full rated capacity and ensures the engine and pump end remain properly matched.
Part Details
| Part Number | 521604 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hatz 74.5 HP T4F Engine |
Compatibility & Fitment
| Name | Model |
|---|---|
| Trash Pumps | MQ600H |
| Trash Pumps | MQ600HTB |
| Trash Pumps | MQ600HTP |
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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