The Multiquip 578129 O-Ring Size 2-129 Buna 70 is a genuine OEM seal designed for MQ Pavement Saw models SP303516, SP303520, SP303526, and SP303530. As a direct OEM replacement, this o-ring is manufactured to the same material and dimensional standards as the original, ensuring a proper seating surface and leak-free performance. Sourced directly through authorized Multiquip supply channels, 578129 is the correct part for maintaining your pavement saw in proper working order.
Key Features
- Buna-N (Nitrile) Construction — Buna 70 durometer compound delivers strong resistance to hydraulic fluid, fuel, and oil exposure common in pavement saw operating environments.
- Correct Size 2-129 Geometry — Matches the original cross-section and inner diameter exactly, seating cleanly in its groove without trimming or shimming.
- Genuine OEM Component — Manufactured to Multiquip's original material specification, this o-ring meets the same compression and seal integrity requirements as the part it replaces.
- Confirmed Fitment for SP303516, SP303520, SP303526, SP303530 — Verified for this specific group of MQ Pavement Saw models, so you can order with confidence using part number 578129.
- Sealing Performance That Protects Critical Systems — A properly seated o-ring prevents fluid or pressure loss that can interrupt cutting operation or accelerate wear on adjacent components.
An o-ring is a precision loop seal used at the interface between two components to prevent fluid, air, or pressure from escaping. In pavement saws, o-rings are used throughout hydraulic circuits, water systems, and fuel pathways — anywhere two mating surfaces must form a pressure-tight connection. When an o-ring flattens, cracks, or takes a set over time, it loses its ability to maintain that seal, leading to leaks, pressure drop, or contamination that can degrade system performance and cause secondary damage. Replacing a worn o-ring promptly with the correct Buna 70 compound and size keeps the sealed system operating at intended pressure and protects the components it serves.
Fits: SP303516, SP303520, SP303526, SP303530 — For fitment questions or order support, contact DHS Equipment directly.
Part Details
| Part Number | 578129 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O-Ring Size 2-129 Buna 70 |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Pavement Saws | SP303516 |
| MQ Pavement Saws | SP303520 |
| MQ Pavement Saws | SP303530 |
| MQ Pavement Saws | SP303526 |
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.
