The Wacker Neuson Piston Complete is a genuine OEM component designed for the LTN4Y and LTN5Y series light towers, including variants such as the LTN4Y 60 Hz, LTN4Y SA, LTN4Y RH, LTN5Y, LTN5Yp, LTN5Yp HD, LTN5Ypa, and LTN5Ypk. Sourced directly from Wacker Neuson, this is the same factory-spec piston assembly used in original production, so you get the correct bore dimensions, ring configuration, and pin fit without any guesswork. Broad compatibility across the LTN4Y and LTN5Y model families makes the a go-to engine rebuild component for fleet owners and service technicians working across multiple configurations. When the engine needs it, trust the part built for it.
Key Features
- OEM Bore and Ring Spec — Manufactured to the exact displacement and compression tolerances Wacker Neuson specifies for LTN series engines, so combustion efficiency is restored to as-built levels.
- Drop-In Engine Fit — Matches the original piston pin diameter, skirt profile, and ring groove spacing, allowing direct installation without machining or adapting the cylinder bore.
- Wide LTN Series Coverage — Compatible with LTN4Y (standard, 60 Hz, SA, RH, and 120V/60Hz variants) and LTN5Y (standard, Yp, Ypa, Ypk, CH, UK, and HD variants), covering the full light tower range.
- Combustion Integrity Restored — A worn or scored piston causes blow-by, loss of compression, and excessive oil consumption; replacing it with this OEM assembly brings the engine back to full operating pressure and output.
- Genuine Wacker Neuson Part — Supplied as a complete piston assembly under part number 5100075821, backed by Wacker Neuson's OEM parts program for verified fitment accuracy.
The piston is the reciprocating heart of a four-stroke engine — it travels up and down inside the cylinder bore, compressing the air-fuel mixture on the upstroke and transferring combustion force to the crankshaft on the power stroke. A correctly fitted piston maintains the tight seal needed for full compression, efficient fuel burn, and stable engine output. When a piston wears, cracks, or scores, compression drops, oil gets past the rings, and the engine runs rough, loses power, or fails to start — making timely replacement essential to keeping a light tower generating at rated capacity.
Part Details
| Part Number | 5100075821 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston 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.
