The Multiquip EM25601 Spring D-21 ST30 is a genuine OEM spring designed for the ST30 swing tube concrete pump series. As a direct Multiquip OEM component, EM25601 is manufactured to exact specifications, ensuring correct tension, travel, and fitment within the pump mechanism. Confirmed compatible with ST30 series concrete pumps, this spring is a stock service item for operators maintaining Multiquip swing tube equipment.
Key Features
- Genuine OEM Spring Tension Spec — Manufactured to the precise coil rate and free-length required for correct mechanical return in the ST30 pump assembly.
- Direct-Fit Installation — Engineered to seat and engage in the original spring pocket without alteration, keeping service time to a minimum.
- ST30 Series Fitment — Confirmed for ST30 swing tube concrete pumps; verify your model and serial number before ordering.
- Consistent Mechanical Return Force — A properly functioning spring maintains reliable actuation timing in the pump mechanism; a fatigued or broken spring can disrupt pumping rhythm and cause inconsistent concrete flow.
- OEM-Backed Part Number — Sourced directly through Multiquip's OEM parts program, so you receive the correct part for the application every time.
The Spring D-21 ST30 is a mechanical return spring used within the concrete pump's valve or actuating mechanism. Springs of this type store and release energy to keep critical moving components cycling correctly through each pump stroke. When a spring fatigues, loses tension, or breaks, the affected mechanism may fail to return to its home position, causing misfires, inconsistent output, or a full pump stoppage — making timely replacement essential to keeping the ST30 operating at capacity.
Part Details
| Part Number | EM25601 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Spring D-21 ST30 |
Compatibility & Fitment
| Name | Model |
|---|---|
| ST30 | ST30 |
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.
