The Multiquip 12033H9820 Piston Ring Set Standard is a genuine OEM replacement designed for C30HDNI and C30HDN series Mayco concrete pumps, including the C30HDNI Precision and C30HDNI Zenith variants. As a factory-sourced component, this ring set is manufactured to the exact tolerances required for proper cylinder sealing and long-term piston performance. Sourced directly from Multiquip, part number 12033H9820 ensures you are installing a component that meets original build specifications without guesswork. Whether you are performing a scheduled overhaul or addressing premature wear, this standard-size ring set is the correct replacement for these pump models.
Key Features
- Genuine OEM Tolerancing: — Manufactured to precise dimensional specifications to maintain proper compression and oil control within the cylinder bore.
- Standard Bore Fitment: — Sized for standard bore dimensions, allowing direct drop-in installation without cylinder regrinding or bore modification.
- Broad Model Coverage: — Compatible with C30HDNI, C30HDN, C30HDNI Precision, and C30HDNI Zenith Mayco concrete pump models.
- Sustained Pump Output: — A correctly seated ring set maintains cylinder compression, enabling consistent concrete displacement and stable pumping pressure during operation.
- Complete Set: — Supplied as a full ring set so all rings in the piston assembly can be replaced together during a single service interval.
Piston rings form a critical seal between the piston and the cylinder wall inside the engine that powers your concrete pump. They control compression, regulate oil consumption, and transfer heat away from the piston into the cylinder. When piston rings wear, crack, or lose tension, you will notice a drop in engine power, increased oil burning, and reduced pumping performance — all signs that a ring replacement is overdue. Installing a fresh set of standard-size rings restores proper cylinder sealing and brings engine performance back to specification.
Part Details
| Part Number | 12033H9820 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Piston Ring Set Standard |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | C30HDNI |
| Mayco Pumps | C30HDN |
| Mayco Pumps | C30HDNI Precision |
| Mayco Pumps | C30HDNI Zenith |
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.
