Wacker Neuson 5100075623 Crank Arm Assembly

The Wacker Neuson Crank Arm Assembly is a genuine OEM component designed for the PDT3A, PDI3A, PDI3A(I), PDT2A, and PDI2A(I) series diaphragm pumps. Sourced directly from Wacker Neuson, this assembly carries the exact specifications required for a correct, lasting installation. It is confirmed compatible across the full range of PDT and PDI series models listed above, making it the straightforward choice when rebuilding or servicing these pumps. Ordering by part number ensures you receive the right assembly the first time.

Key Features

• Genuine OEM Construction — Manufactured to Wacker Neuson's original design tolerances, ensuring the crank arm delivers the correct stroke geometry for consistent diaphragm actuation.
• Direct-Fit Replacement — Matches the original mounting points and pin dimensions of the PDT and PDI series pump housings, dropping in without modification.
• Broad PDT and PDI Series Compatibility — Fits PDT3A, PDI3A, PDI3A(I) Pump Diaphragm, PDT2A, and PDI2A(I) Pump models under a single part number.
• Consistent Pump Output — A correctly functioning crank arm maintains the precise reciprocating motion the diaphragm depends on; a worn or damaged arm causes irregular flow, pressure loss, or pump failure.
• Long-Term Serviceability — As a complete assembly, 5100075623 replaces the entire crank arm unit in one step, simplifying the repair and restoring the pump to original operating condition.

The crank arm assembly is the mechanical link between the pump's drive shaft and its diaphragm. As the drive shaft rotates, the crank arm converts that rotational motion into the back-and-forth movement the diaphragm needs to draw fluid in and push it out. When the crank arm wears, bends, or fails, the diaphragm loses its consistent stroke, resulting in reduced flow rate, uneven pressure, or a complete loss of pumping action. Replacing it with the correct OEM assembly restores the original stroke length and timing the pump was engineered around.

Part Details

Compatibility & Fitment

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.