The Wacker Neuson Lock Washer is a genuine OEM component designed for WP, WPP, VP, and WPU series vibratory plate compactors. Sourced directly from Wacker Neuson, this lock washer meets the exact tolerances and material specifications of the original hardware used on the production line. It is a direct-fit replacement for a wide range of single-direction and reversible vibratory plates, including the WP1030A, WP1550A, WPP1550A, WPU1550A, VP40H, VP50H, VP50X, VP60H, VP60X, and MPU 29 series. Keeping fastener connections properly secured is critical to the reliable operation of compaction equipment, and using the correct OEM hardware ensures the connection performs exactly as intended.
Key Features
- Genuine OEM Hardware Tolerancing — Manufactured to Wacker Neuson's exact hardness and dimensional specs, so the washer bites and holds under the vibration loads these machines generate continuously during compaction work.
- Drop-In Replacement — Matches the original mounting configuration, so it installs in the same position with no rework or shimming needed to seat correctly.
- Broad Vibratory Plate Coverage — Compatible with WP, WPP, VP, and WPU series models across 40 kN, 50 kN, and 60 kN ratings, including both single-direction and reversible plate variants.
- Vibration-Resistant Locking Action — Designed to resist loosening in high-frequency vibration environments; a failed or missing lock washer can allow fasteners to back out, leading to component misalignment or structural damage during operation.
- Small Part, Significant Consequence — Hardware failures on vibratory plates are often traced back to worn or incorrect washers; replacing with the correct OEM part restores the clamping integrity of the fastener assembly.
A lock washer is a hardened fastener component placed beneath a nut or bolt head to prevent the fastener from loosening under vibration or dynamic loading. On vibratory plate compactors, which operate under continuous high-frequency oscillation, fasteners are especially vulnerable to backing out over time — making a correctly spec'd lock washer essential rather than optional. When a lock washer wears flat, deforms, or is substituted with an incorrect size, the clamping force on the joint degrades, which can cause components to shift, rattle loose, or sustain accelerated wear during compaction cycles.
Part Details
| Part Number | 5000401000 |
|---|---|
| Old Part Number | 0401000 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| WPU1550A | WPU1550A | 5000630033, 5100071592 |
| WPU1550Aw | WPU1550Aw | 5000630034 |
| Vibratory Soil Plate, 60 kN | VP60X | 5000009533 |
| Vibratory Soil Plate, 50 kN | VP50H | 5000009542 |
| Vibratory Soil Plate, 60 kN | VP60H | 5000009543 |
| Vibratory Soil Plate, 50 kN | VP50X | 5000009531 |
| Single direction vibratory plate WP1030A | WP1030A | 5000630015 |
| VP50Hw-VIBROPLATE | VP50Hw | 5000630096 |
| VP60Hw-VIBROPLATE | VP60Hw | 5000630097 |
| Vibratory Soil Plate, 40 kN | VP40H | 5000009535 |
| Single direction vibratory plate WP1235A | WP1235A | 5000630016 |
| WPP 1550Aw | WPP1550Aw | 5000630030 |
| VP50Xw-VIBROPLATE | VP50Xw | 5000630094 |
| VP60Xw-VIBROPLATE | VP60Xw | 5000630095 |
| WP 1540W | WP1540W | 5000630018 |
| WP 1550W | WP1550W | 5000630020 |
| WP 2050W | WP2050W | 5000630023 |
| WPP 1540A | WPP1540A | 5000630025 |
| WPP 1540W | WPP1540W | 5000630027 |
| WPP 1550A | WPP1550A | 5000630029 |
| WPP 1550W | WPP1550W | 5000630031 |
| WPP 1550Ww | WPP1550Ww | 5000630032 |
| WP 1540A | WP1540A | 5000630017 |
| WP 1550A | WP1550A | 5000630019 |
| WP 1550RAW | WP1550RAW | 5000630021 |
| WP 2050A | WP2050A | 5000630022 |
| WPP 1540Aw | WPP1540Aw | 5000630026 |
| WPP 1540Ww | WPP1540Ww | 5000630028 |
| Single Direction Plates | WP1235Aw | 5000630103 |
| Single Direction Plates | WP1235Aw-L | 5000630104, 5000630105 |
| Single Direction Plates | WP1235Aw-LL | 5000630122 |
| Single Direction Plate | WP1030Aw | 5000630110 |
| Single Direction Plates | WP1540Aw-L | 5000630123 |
| Reversible Plates | WPU 1550A-L | 5000630124 |
| Single Direction Plates | WP2050Aw-L | 5000630125 |
| Single Direction Plates | WP1550Aw-L | 5000630126 |
| Single Direction Plates | WP1550Aw | 5000630112 |
| Single Direction Plate | WP1550Ww | 5000630113 |
| Single Direction Plate | WP2050Aw | 5000630115 |
| Single Direction Plate | WP2050Ww | 5000630116 |
| Single Direction Plates | WP1540Aw | 5000630106 |
| Single Direction Plate | WP1540Ww | 5000630111 |
| Reversible Plates | MPU 29 | 5000630141, 5000630228 |
| WPU1550AW-US | WPU1550AW-US | 5100069715 |
| WPU1550Aw | WPU1550AW | 5100071591 |
| Reversible Plates | MPU 29A | 5000630244 |
| WPU1550A-US | WPU1550A-US | 5100069716 |
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.
