The Wacker Neuson Lock Washer is a genuine OEM component designed for the PS2-500, PSA2-500, PS2-800, and PSA2-800 series submersible pumps. As a direct factory replacement, this lock washer meets Wacker Neuson's original design tolerances, ensuring the correct clamping force and thread retention every time. Sourced directly from Wacker Neuson, part is the same component installed at the factory — no guesswork on fit or specification. If you're servicing any of the listed PS2 or PSA2 pump models, this is the correct replacement part.
Key Features
- Correct Tension and Load Distribution — Manufactured to OEM hardness and dimensional specs so the washer maintains proper clamping load without deforming under torque.
- Drop-In Replacement — Matches the original fastener stack-up exactly, seating against mating surfaces the same way the factory-installed part does.
- Broad PS2 and PSA2 Series Coverage — Confirmed fitment across PS2-500, PSA2-500, PS2-800, and PSA2-800 pump models, covering a wide range of Wacker Neuson submersible pump configurations.
- Prevents Fastener Back-Out — A functioning lock washer resists vibration-induced loosening; a worn or missing one allows fasteners to back out, leading to component misalignment or leaks during pump operation.
- Genuine Wacker Neuson OEM Part — Supplied as an authorized OEM replacement, so the material grade, inside diameter, and bite geometry are exactly what the original design specifies.
A lock washer is a small but critical fastening component that sits between a bolt head or nut and the mating surface it secures. Its primary job is to resist loosening caused by vibration and dynamic loads — both of which are constant during submersible pump operation. When a lock washer becomes deformed, corroded, or worn flat, it loses its gripping action and allows fasteners to work loose over time, which can result in leaks, misaligned components, or more extensive mechanical damage if left unchecked.
Part Details
| Part Number | 5100054401 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PSA2-500 | PSA2500 | 5000008790, 5000009179, 5000009181 |
| PS2-500 | PS2500 | 5000008794, 5000009176, 5000009178 |
| PS2-800 | PS2800 | 5000620438, 5000620439, 5000620452 |
| PSA2-800 | PSA2800 | 5000620449, 5000620450 |
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.
