The Wacker Neuson is a genuine OEM Lock Washer designed for the PDT and PDI series diaphragm pumps, including the PDT2A, PDT2, PDI2A(I), PDT3A, PDT3, PDI3A, and PDI3A(I) models. As a direct Wacker Neuson OEM part, the is manufactured to the exact material and dimensional specifications required for these diaphragm pump assemblies. Sourcing a genuine OEM component ensures the fastener performs exactly as intended within the pump's mechanical assembly, maintaining proper clamp load and vibration resistance across demanding pumping cycles.
Key Features
- Genuine OEM Material Grade — Manufactured to Wacker Neuson's specified hardness and spring-tension profile, ensuring the washer bites correctly against fastener and mating surface to hold torque under vibration.
- Direct Drop-In Replacement — Matches the original bore diameter, outer diameter, and thickness of the factory washer, seating onto existing fastener hardware without any modification to the pump assembly.
- Broad PDT/PDI Series Coverage — Confirmed fitment across the PDT2A, PDT2, PDI2A(I), PDT3A, PDT3, PDI3A, and PDI3A(I) diaphragm pump models, making it a practical stocking part for operators running multiple pump sizes.
- Vibration-Resistant Locking Action — Lock washers in diaphragm pump assemblies are subjected to continuous cyclic loading; correct spring tension prevents fastener back-off that can lead to loosened housings or fluid leaks.
- Verified Part Number Fit — Cross-referenced to OEM part number 5000179869, giving you confidence you are installing the correct hardware for these specific pump models.
A lock washer is a deceptively simple but critical fastener component. Its job is to resist loosening caused by vibration, torque relaxation, and cyclic loading — conditions that are constant in a working diaphragm pump. The washer's hardened spring action bites into both the fastener head and the mating surface, maintaining clamp load even as the pump flexes and pulses through each stroke. When a lock washer becomes flattened, corroded, or is left out entirely, fasteners can back off over time, leading to misaligned housings, fluid weeping, or accelerated wear on surrounding components.
Part Details
| Part Number | 5000179869 |
|---|---|
| Old Part Number | 0179869 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Lock Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PDT2A | PDT2A | 5000620769 |
| PDT2 Pump, Diaphragm | PDT2 | 5000620770 |
| PDI2A(I) | PDI2A(I) | 5000620772 |
| PDT3A | PDT3A | 5000620773 |
| PDT3 | PDT3 | 5000620774 |
| PDI3A | PDI3A | 5000620775 |
| PDI3A(I) | PDI3A(I) | 5000620776 |
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.
