The Wacker Neuson Injection Pump is a genuine OEM component designed for the G25 and G20 portable generator series and the LTW20Z family of Isuzu-powered light towers. Sourced directly from Wacker Neuson, this injection pump meets the exact specifications of the original part installed at the factory. It is confirmed to fit a wide range of G25 configurations — including Standard, Cold Weather, Custom, Extended Run, and 600V switchable T4i variants — as well as G20 mobile generators and LTW20Z1 and LTW20Z3 light towers in standard, cold weather, custom, and vertical mast configurations. When your machine's fuel delivery system needs attention, part number is the correct replacement to restore proper operation.
Key Features
- Genuine OEM Fuel Delivery Accuracy — Manufactured to Wacker Neuson's exact injection timing and flow-rate specifications, ensuring the Isuzu engine receives precisely metered fuel for consistent power output.
- Direct-Mount Replacement — Matches the original pump's bolt pattern, inlet/outlet ports, and drive interface, allowing straightforward installation without modification to fuel lines or mounting hardware.
- Broad G25, G20, and LTW20Z Fitment — Covers an extensive range of G25 generator builds (Standard, Cold Weather, Custom, Extended Run, 600V T4i) plus G20 mobile generators and the full LTW20Z1 and LTW20Z3 light tower lineup including vertical-mast and skidded variants.
- Sustained Engine Performance — A correctly functioning injection pump maintains proper fuel pressure and atomization, supporting smooth engine starts, stable load response, and full rated generator output under continuous operation.
- Fuel System Integrity — As a genuine OEM part, the 5200002104 meets the sealing and pressure tolerances required by the fuel system, reducing the risk of leaks or pressure loss that can compromise engine operation and site safety.
The injection pump is the heart of a diesel engine's fuel delivery system. It draws fuel from the tank, pressurizes it, and delivers precisely timed, metered charges to each injector so the engine can combust fuel efficiently and produce consistent power. On generator and light tower applications like the G25 and LTW20Z series, a healthy injection pump is essential for reliable engine starts, stable voltage output, and sustained runtime under load. When the pump wears or fails, symptoms typically include hard starting, rough idle, loss of power, and excessive smoke — all of which can halt a job site operation until the pump is replaced.
Part Details
| Part Number | 5200002104 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Injection Pump |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Mobile Generator, Custom | G25 | 5000620346, 5000620642, 5000620640, 5000620709, 5000620641, 5200005557, 5200003991, 5000620931, 5200001316, 5200014461, 5200014460, 5200014462, 5000621005, 5000620706, 5100022834, 5100042507, 5100042510, 5100042512, 5100042509, 5100025836, 5100042508 |
| LTW20Z-1, LIGHT TOWER 60Hz, ISUZU, CUSTOM, T4i | LTW20Z1 | 5000620842, 5000620375, 5200004205, 5200004096, 5200023191, 5200024872 |
| LTW20Z-3, LIGHT TOWER 60HZ, ISUZU TIER 4i | LTW20Z3 | 5000620376, 5000620843, 5200003583, 5200004097, 5200023192 |
| LTW20Z3-V S LIGHT TOWER, COLD WEATHER, T4i | LTW20Z3-V S | 5200018566, 5200018558, 5200018562, 5200023196, 5100015094, 5100022126 |
| LTW20Z1-V S LIGHT TOWER, COLD WEATHER, T4i | LTW20Z1-V S | 5200018565, 5200018557, 5200018561, 5200024875, 5200023195, 5100015093, 5100022125 |
| Light Tower | LTW20Z3-V | 5200012881, 5200012885, 5200012867, 5200022694 |
| Light Tower | LTW20Z1-V | 5200012880, 5200012884, 5200012866 |
| Mobile Generator | G20 | 5200016628, 5200022625 |
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.
