The Wacker Neuson Injection Pump Complete is a genuine OEM component designed for the LTN4Y and LTN5Y series light towers, including variant models such as the LTN4Y SA, LTN4Y RH, LTN5Yp, LTN5Ypa, LTN5Ypk, and LTN5Yp HD. Sourced directly from Wacker Neuson, this assembly meets the exact specifications of the original unit it replaces, ensuring correct fuel delivery performance from installation. With coverage across more than a dozen LTN-series configurations — including 60Hz, 120V/60Hz, CH, UK, and SA variants — part number is the verified replacement for a wide range of these light tower builds. When your injection pump fails, getting the right assembly back into the machine fast is what gets your tower back into service.
Key Features
- OEM-Matched Fuel Delivery Calibration — Supplied as a complete assembly calibrated to Wacker Neuson's original injection specifications, so fuel metering and timing are correct right out of the box.
- Complete Drop-In Assembly — Ships as a fully assembled injection pump unit, connecting directly to the existing fuel and drive interfaces without partial rebuilding or sub-component sourcing.
- Broad LTN-Series Coverage — Fits LTN4Y and LTN5Y family models across standard, SA, RH, HD, CH, UK, 60Hz, and 120V/60Hz configurations — one part number covering a wide range of light tower variants.
- Sustained Engine Output Under Load — A correctly functioning injection pump delivers consistent fuel pressure and volume to the engine, maintaining steady generator output during extended night-shift or construction site operation.
- Fuel System Integrity — As a genuine OEM assembly, this pump is built to the tolerances required for proper injection pressure and seal integrity — critical for preventing unmetered fuel delivery or injection system contamination.
The injection pump is responsible for pressurizing diesel fuel and delivering precise, timed doses to each engine cylinder. In a light tower application, where the engine runs at a steady load for extended hours, a worn or failing injection pump causes hard starting, rough running, loss of power, or complete engine shutdown. Replacing the pump as a complete assembly — rather than attempting internal repairs on a worn unit — restores full injection pressure and timing accuracy, ensuring the engine drives the generator at the correct speed and output level.
Part Details
| Part Number | 5100075839 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Injection Pump Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| LTN5Yp | LTN5Yp | 5100069549 |
| LTN5Y SA | LTN5Y SA | 5100069548 |
| LTN4Y | LTN4Y ME | 5100069545 |
| LTN4Y 60 Hz | LTN4Y 60Hz | 5100069546 |
| LTN4Y SA | LTN4Y SA | 5100069547 |
| LTN4Y | LTN4Y | 5100073603 |
| LTN5Ypk | LTN5Ypk | 5100077880 |
| LTN4Y RH | LTN4Y RH | 5100077620 |
| LTN5Yp HD | LTN5Yp HD | 5100079429 |
| LTN5Y | LTN5Y | 5100069550 |
| LTN5Ypa | LTN5Ypa | 5100069551 |
| LTN5Y CH | LTN5Y CH | 5100069552 |
| LTN5Y UK | LTN5Y UK | 5100069553 |
| LTN4Y 120V/60Hz | LTN4Y 120V/60Hz | 5100075978 |
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.
