The Multiquip 50355400 Injection Pump 2G40 Hatz is a genuine OEM fuel injection pump designed for RAMMAX walk-behind rollers including the RW1404, RW1404MR, and RW1504HF. As a direct OEM replacement, part 50355400 is manufactured to the same specifications as the original component, ensuring correct fit and function without adaptation. This part is compatible with RW1404MR units at serial number 326075 and up, and RW1504HF units up to serial number. Source your replacement from DHS Equipment with confidence — fitment accuracy and part number verification are verified against Multiquip's OEM parts catalog.
Key Features
- OEM Fuel Delivery Precision — Manufactured to exact OEM injection timing and output specifications for the Hatz 2G40 diesel engine, ensuring consistent fuel atomization and combustion efficiency.
- Direct-Mount Replacement — Installs directly onto the Hatz 2G40 engine block using the original mounting configuration, with no re-machining or adapter hardware required.
- Confirmed Fitment for RAMMAX Rollers — Verified for RW1404, RW1404MR (S/N 326075 and up), and RW1504HF (up to S/N 1534188) walk-behind roller models.
- Restores Full Compaction Performance — A worn or failing injection pump causes hard starting, rough running, and loss of compaction force; this OEM replacement brings the roller back to rated operating output.
- Fuel System Integrity — Proper injection pump function is critical to preventing unburned fuel from entering the engine oil and causing accelerated internal wear — making this a priority service item when symptoms appear.
The injection pump is the heart of the diesel fuel system on the Hatz 2G40 engine. It pressurizes and meters diesel fuel, delivering precisely timed injections into the combustion chamber to generate the power that drives the roller's vibratory drum and compaction mechanism. When the injection pump wears or fails, symptoms typically include difficulty starting, excessive smoke, loss of power, and irregular engine running — all of which directly affect compaction quality and output. Replacing a degraded pump with a correct OEM unit restores the engine's ability to run at its designed fuel-air ratio, protecting downstream engine components and maintaining consistent roller performance on the job.
Part Details
| Part Number | 50355400 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Injection Pump 2G40 Hatz |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rollers | RW1404MR S/N 326075 and up |
| Rollers | RW1504HF up to S/N 1534188 |
| Rollers | RW1404 |
| Rollers | RW1404MR |
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.
