The Multiquip 100KDO75205 Packing Lower ST-4125 is a genuine OEM component designed for the ST-4125 swing tube concrete pump. As a direct OEM replacement, this packing is manufactured to the exact material and dimensional standards required for proper sealing performance in the ST-4125 pumping system. Sourced directly through Multiquip's authorized parts network, the part ensures a correct, confident fit for operators maintaining their ST-4125 equipment. DHS Equipment stocks this part to keep your concrete pump operating at full capacity.
Key Features
- Genuine OEM Sealing Material — Manufactured to the exact compound and durometer specification required for the ST-4125 lower packing position, ensuring consistent compression and sealing integrity under pump pressure.
- Direct Lower Position Replacement — Designed to install directly into the lower packing location on the ST-4125, matching the original profile and geometry for a straightforward service swap.
- Confirmed ST-4125 Fitment — Verified for the Multiquip ST-4125 swing tube concrete pump; always cross-reference your model and serial plate before ordering.
- Maintains Pumping Pressure — A correctly seated lower packing keeps hydraulic and material pressure contained within the pumping circuit; worn or failed packing allows pressure loss and slurry bypass that degrades output volume and consistency.
- Fuel System Integrity — Replacing this packing at the manufacturer-recommended service interval helps prevent premature wear to adjacent components in the pumping assembly, extending the service life of the overall pump system.
The lower packing on the ST-4125 concrete pump serves as a critical seal within the swing tube pumping circuit. It contains the pressure generated during each pumping stroke, preventing concrete slurry from bypassing the delivery path and leaking into surrounding components. When this packing wears down or hardens with age, pump output pressure drops, material can back-leak, and the surrounding housing and sealing surfaces are exposed to abrasive damage — making timely replacement essential to keeping the pump delivering consistent volume and pressure on the job.
Part Details
| Part Number | 100KDO75205 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Packing Lower ST-4125 |
Compatibility & Fitment
| Name | Model |
|---|---|
| ST-4125 | ST-4125 |
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.
