The Wacker Neuson Arm is a genuine OEM component designed for the PDT3A, PDI3A, PDI3A(I), PDT2A, and PDI2A(I) series diaphragm pumps. As a direct factory replacement, this part is sourced from Wacker Neuson's authorized supply chain, ensuring it matches the original specification to which your pump was built. This Arm is confirmed to fit across both PDT and PDI pump families, making it a straightforward swap for the worn or damaged original. Keeping the correct OEM Arm in place is essential to maintaining proper pump operation and extending the service life of the surrounding diaphragm assembly.
Key Features
- Genuine OEM Construction — Manufactured to Wacker Neuson's original design tolerances, ensuring the pivot geometry and load transfer of the Arm match the pump's engineered operating parameters exactly.
- Direct Drop-In Replacement — Shares identical mounting points and dimensions as the factory original, so installation aligns with existing hardware and diaphragm linkage without rework.
- Broad PDT and PDI Pump Compatibility — Verified fitment across PDT3A, PDI3A, PDI3A(I) Pump Diaphragm, PDT2A, and PDI2A(I) Pump models under a single part number.
- Restored Diaphragm Actuation — A correctly functioning Arm transfers mechanical motion to the diaphragm evenly; a worn or bent arm introduces irregular stroke and reduces pump output pressure and flow.
- Authorized OEM Part — Supplied with the full backing of the Wacker Neuson parts program, giving you traceability and confidence that part number 5100075622 is the correct replacement for your machine.
The Arm is a mechanical link within the pump's diaphragm actuation system, converting rotary or reciprocating drive motion into the controlled displacement that moves fluid through the pump. It must maintain precise geometry under repeated cyclic load — any bending, wear at the pivot, or cracking in the arm body disrupts the stroke of the diaphragm, leading to reduced flow, pressure fluctuation, or complete loss of pumping capability. Replacing a worn Arm promptly with a correct OEM part restores the intended stroke length and keeps the diaphragm operating within its designed range, protecting both the diaphragm and the pump housing from secondary damage.
Part Details
| Part Number | 5100075622 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Arm |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PDT3A | PDT3A | 5100075507 |
| PDI3A | PDI3A | 5100075508 |
| PDI3A(I) PUMP DIAPHRAGM | PDI3A(I) | 5100075509 |
| PDT2A | PDT2A | 5100075510 |
| PDI2A(I) PUMP | PDI2A(I) | 5100075511 |
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.
