The Wacker Neuson is a genuine OEM Lock Washer M4 designed for the PS4-11003HH and PS4-11003HF series submersible pumps. As a factory-sourced component, it meets the exact specifications set during original manufacture, ensuring proper clamping load and corrosion resistance in a wet pump environment. This lock washer is compatible across a wide range of PS4 series configurations, including 220V, 440V, 575V, and 400V/50Hz variants in both High Head and High Output models. Keeping fastener hardware at OEM spec is an easy step that protects the integrity of the entire pump assembly during demanding dewatering operations.
Key Features
- Genuine OEM Corrosion-Resistant Construction — Factory-grade material resists oxidation and chemical exposure, critical for a fastener that lives inside a submersible pump housing.
- M4 Thread Compatibility — Sized precisely to M4 fasteners, this washer seats flush and delivers consistent locking force without shimming or adaptation.
- Broad PS4 Series Coverage — Fits both PS4-11003HH High Head and PS4-11003HF High Output models across 220V, 440V, 575V, and 400V/50Hz electrical configurations.
- Maintains Fastener Clamp Load — Prevents fastener loosening under continuous pump vibration, protecting internal components from shifting or misalignment during operation.
- Direct OEM Sourcing — Supplied under Wacker Neuson part number 5000150853, so you can confirm the correct part before it ships and cross-reference your service documentation with confidence.
A lock washer is a thin hardened ring placed under a bolt or nut to prevent it from backing out due to vibration or dynamic loading. In a submersible pump like the PS4 series, constant motor vibration and hydraulic forces work against every fastener in the assembly — a failed or absent lock washer allows hardware to loosen over time, which can lead to misaligned internal components, water ingress into sealed sections, or mechanical failure of the pump housing. Replacing worn or damaged lock washers during routine service is a low-cost step that preserves the reliability of the entire unit.
Part Details
| Part Number | 5000150853 |
|---|---|
| Old Part Number | 0150853 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Washer M4 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PS4-11003HH | PS411003HH | 5000008876, 5000009153, 5000009154, 5000008867, 5000008869, 5000008870, 5000008877, 5000009155, 5000009208 |
| PS4-11003HF | PS411003HF | 5000008878, 5000009156, 5000009157, 5000008871, 5000008873, 5000008874, 5000008879, 5000009158, 5000009210 |
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.
