The Wacker Neuson Lock Washer is a genuine OEM component designed for the PDT2A, PDT2, PDT3A, PDT3, PDI2A(I), PDI3A, and PDI3A(I) series diaphragm pumps. Sourced directly from Wacker Neuson, this OEM part is manufactured to the exact specifications required by your pump, ensuring a correct, trouble-free installation every time. It is a direct-fit replacement with no guesswork — the matches the original hardware in material grade, inside diameter, and tooth profile. Confirm your model number before ordering to ensure this lock washer is the right match for your specific pump variant.
Key Features
- Genuine OEM Hardware Grade — Manufactured to the same material hardness and tooth-engagement spec as the original, ensuring consistent clamping force and resistance to vibration-induced loosening.
- Drop-In Replacement — Matches the original mounting position and fastener size on PDT and PDI series diaphragm pumps, so installation requires only standard hand tools.
- Broad PDT / PDI Series Coverage — A single part number covers the PDT2A, PDT2, PDT3A, PDT3, PDI2A(I), PDI3A, and PDI3A(I) pump models, simplifying parts ordering across your fleet.
- Vibration Resistance — The locking teeth bite into the mating surface under torque, preventing fastener back-off during continuous pump operation where vibration and pressure fluctuations are constant.
- Fastener Integrity — A failed or missing lock washer can allow critical fasteners to loosen over time, leading to fluid leaks, misalignment, or accelerated wear on pump internals.
A lock washer is a hardened, toothed or split ring placed beneath a fastener to prevent it from loosening under vibration or dynamic load. On diaphragm pumps like the PDT and PDI series, internal pressure cycling and motor vibration create conditions that can gradually back out hardware — the lock washer counters this by biting into the bolt head or mating surface and maintaining clamping force. When a lock washer is worn flat, corroded, or missing entirely, fasteners can loosen, potentially causing leaks, component misalignment, or more serious mechanical failures within the pump assembly.
Part Details
| Part Number | 5000180276 |
|---|---|
| Old Part Number | 0180276 |
| 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.
