Multiquip EM704 Large Spiral Pin 1/2x2

The Multiquip EM704 Large Spiral Pin 1/2x2 is a genuine OEM replacement pin designed for the C30HD concrete pump. As a factory-sourced component, this pin is manufactured to the exact material and dimensional tolerances specified for the C30HD, ensuring a proper fit within the machine's mechanical assembly. DHS Equipment supplies this part direct, so you can order with confidence knowing you are receiving an authentic Multiquip component backed by the manufacturer.

Key Features

• OEM Material Integrity — Spiral pin construction provides the torsional strength and radial retention force required for high-cycle concrete pump applications.
• Exact Dimensional Fit — Sized at 1/2x2 to match the original bore and shaft geometry of the C30HD, so the pin seats fully without rework or shimming.
• C30HD Compatibility — Confirmed fitment for the Multiquip C30HD cycloidal-drive concrete pump.
• Retention Under Load — The spiral coil design maintains grip under vibration and dynamic loading, preventing pin migration during pump operation.
• Genuine Multiquip OEM Part — Sourced directly from Multiquip, this component meets the same specifications as the part installed at the factory.

A spiral pin — sometimes called a roll pin or coiled spring pin — is a slotted, coiled fastener used to secure rotating or pivoting components to a shaft or housing. In a concrete pump like the C30HD, these pins lock critical drive and linkage components in position, transferring load between moving parts without allowing rotation or axial drift. When a spiral pin shears or works loose, the components it secures can shift out of alignment or disengage entirely, leading to loss of pump output or accelerated wear on surrounding parts. Replacing a worn or failed pin with the correct OEM-spec EM704 restores proper mechanical engagement and protects adjacent components from secondary damage.

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.