The Multiquip 12035 Piston Ring Set OS=0.50 is a genuine OEM component designed for C30HDNI and C30HDN series Mayco concrete pumps, including C30HDNI Precision and C30HDNI Zenith variants. This oversized 0.50 ring set is engineered to restore proper cylinder sealing during an engine overhaul or bore repair, delivering the dimensional accuracy required for a correct rebuild. As a genuine Multiquip OEM part, 12035 meets the original engineering tolerances specified for these concrete pump power units. Confirm your model code before ordering to ensure correct fitment across the C30HDN family.
Key Features
- OEM Oversize Tolerance: — Manufactured to the exact 0.50 oversize specification, ensuring proper ring-to-bore clearance after cylinder machining — critical for compression integrity in concrete pump engines.
- Direct Rebuild Fit: — Designed to drop into a properly bored and honed cylinder on C30HDNI and C30HDN engines without additional machining beyond standard oversize preparation.
- Broad C30HDN Family Coverage: — Compatible with C30HDNI, C30HDN, C30HDNI Precision, and C30HDNI Zenith Mayco concrete pump models.
- Compression and Oil Control Restored: — A correctly installed ring set re-establishes combustion pressure and prevents oil blow-by, keeping the engine producing the power needed to drive the concrete pump efficiently.
- Genuine Multiquip OEM Quality: — Sourced directly through the Multiquip OEM parts network, confirming ring profile, gap spacing, and material grade match the original build specification for these engines.
Piston rings seal the combustion chamber between the piston and the cylinder wall, maintaining compression pressure while controlling oil consumption. In a concrete pump engine, worn or damaged rings allow combustion gases to pass the piston — a condition known as blow-by — which reduces power output, increases oil burning, and can lead to accelerated engine wear. An oversized ring set like the Multiquip 12035 is used when the cylinder bore has been machined to the 0.50 oversize dimension to correct wear or scoring, restoring the tight seal the engine needs to operate at full capacity.
Part Details
| Part Number | 12035 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Piston Ring Set OS=0.50 |
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.
