The Multiquip EM517700 is a genuine OEM O-Ring designed for Mayco hydraulic-driven concrete pump models including LS300, LS400, LS500, LS600, LS60TD, LS40D, LS40TD, LS50TD, LS600P, and LS300P. As a direct Multiquip OEM part, the EM517700 is manufactured to the exact material grade and dimensional tolerances specified for these machines, ensuring a proper seal every time. If your pump is showing signs of fluid weeping, pressure loss, or leakage at a joint or fitting, a worn O-Ring is a common cause and this is the correct replacement to restore it. DHS Equipment stocks this part to help keep your Mayco concrete pump running at full hydraulic efficiency.
Key Features
- OEM Material Specification — Manufactured to the exact compound and durometer rating specified for Mayco hydraulic concrete pump sealing applications, not a generic substitute.
- Drop-In Replacement — Dimensioned to seat correctly in the original groove or port without trimming or modification, maintaining proper compression and sealing contact.
- Broad Mayco Pump Compatibility — Verified fitment across LS300, LS400, LS500, LS600, LS60TD, LS40D, LS40TD, LS50TD, LS600P, and LS300P models.
- Hydraulic Integrity — A correctly seated O-Ring maintains system pressure and prevents hydraulic fluid loss, allowing the pump to deliver consistent concrete output and accurate stroke cycles.
- Fluid System Safety — Failed O-Rings in hydraulic concrete pumps can result in uncontrolled fluid release under pressure; replacing worn seals promptly is an important safety and operational practice.
An O-Ring is a precision-molded loop of elastomeric material that creates a fluid-tight seal between two mating surfaces, such as fittings, valve bodies, cylinder ports, or hydraulic line connections. In a hydraulic-driven concrete pump like the Mayco LS series, O-Rings are used throughout the hydraulic circuit and pumping system to prevent leaks and maintain the pressure needed to move concrete through the line. When an O-Ring degrades, flattens, or cracks from heat, pressure cycling, or chemical exposure, the seal fails — leading to visible fluid leaks, pressure drop, erratic pump output, or hydraulic component damage if left unaddressed.
For questions about fitment or to confirm this is the correct O-Ring for your specific Mayco pump configuration, contact the DHS Equipment parts team directly.
Part Details
| Part Number | EM517700 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | LS300 |
| Mayco Pumps | LS400 |
| Mayco Pumps | LS500 |
| Mayco Pumps | LS600 |
| Mayco Pumps | LS60TD |
| Mayco Pumps | LS40D |
| Mayco Pumps | LS40TD |
| Mayco Pumps | LS50TD |
| Mayco Pumps | LS600P |
| Mayco Pumps | LS300P |
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.
