The Wacker Neuson Diaphragm Complete is a genuine OEM component designed for the LTN4Y and LTN5Y series light towers, including LTN4Y, LTN4Y RH, LTN5Y, LTN5Yp, LTN5Yp HD, LTN5Ypk, LTN5Ypa, and regional variants. Sourced directly from Wacker Neuson, this part meets the original engineering specifications for the fuel system it serves. Confirmed fitment spans the full LTN4Y and LTN5Y family — including 60Hz, 120V/60Hz, SA, ME, CH, and UK configurations — so you can order with confidence that is the right part for your machine.
Key Features
- OEM-Grade Diaphragm Material — Manufactured to the original flex and fuel-resistance specification, ensuring proper sealing and stroke performance under continuous fuel system cycling.
- Drop-In Assembly Fit — Supplied as a complete diaphragm assembly, matching the original mounting geometry so installation aligns without rework or modification.
- Broad LTN Series Coverage — Fits the full LTN4Y and LTN5Y light tower family, including 60Hz, 120V/60Hz, SA, ME, RH, CH, UK, HD, and pk variants.
- Restores Fuel Delivery Consistency — A worn or cracked diaphragm causes erratic fuel flow, hard starts, and rough running; replacing it with 5100075775 brings fuel pulse delivery back to spec.
- Fuel System Integrity — A correctly seated diaphragm prevents fuel weeping and vapor loss, keeping the fuel circuit sealed and the machine running safely during extended tower operation.
The diaphragm complete is a critical flexible membrane within the fuel pump assembly of the light tower's engine. It flexes in a rhythmic pulse to draw fuel from the tank and push it toward the carburetor or injection circuit, maintaining a steady and consistent fuel supply at the correct pressure. When the diaphragm cracks, hardens, or loses its flexibility — common results of heat cycling and fuel exposure over time — fuel delivery becomes inconsistent, leading to rough idling, power loss, or a machine that won't start and hold under load.
Part Details
| Part Number | 5100075775 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Diaphragm 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.
