The Multiquip 21E23502H7 is a genuine OEM Piston Ring Set 0.25 O.S. designed for MTX-series rammers including the MTX60SD, MTX60SF, MTX70SD, MTX80SD, and MTX80SF. As an authorized Multiquip OEM part, it is manufactured to the exact tolerances required for the engine fitted to these machines, ensuring a correct drop-in installation during engine reconditioning. DHS Equipment supplies this part direct, so you can be confident you are receiving the correct oversized ring set for your rebuild specification.
Key Features
- OEM-Spec Ring Geometry — Manufactured to the exact radial thickness, axial height, and end-gap specification for the MTX-series rammer engine, ensuring proper cylinder sealing after a bore hone to 0.25mm oversize.
- 0.25mm Oversize Fitment — This set is sized specifically for cylinders bored 0.25mm over standard, making it the correct choice when standard rings can no longer seat against a worn or scored bore.
- Broad MTX Rammer Compatibility — Confirmed fitment across the MTX60SD, MTX60SF, MTX70SD, MTX80SD, and MTX80SF rammer models, covering both 60 lb and 80 lb operating-weight variants in the MTX second-generation lineup.
- Restored Compression and Power Stroke — A properly seated ring set maintains combustion chamber pressure, restoring the full impact energy the rammer delivers to the ground. Worn or broken rings result in loss of compression, hard starting, and reduced compaction performance.
- Engine Integrity After Reconditioning — Using the correct OEM oversize set ensures the rings bed in properly against the freshly honed cylinder wall, protecting the reconditioned engine from premature blow-by and oil consumption.
Piston rings seal the combustion chamber between the piston and the cylinder wall, allowing the engine to build the compression needed to fire and deliver power. They also regulate oil consumption by scraping excess oil back down the cylinder bore. In a rammer engine, which operates under continuous high-frequency reciprocating load, ring condition is critical — worn rings cause compression loss, increased oil burning, difficult starting, and a noticeable drop in the machine's impact force at the shoe. This 0.25 O.S. set is intended for use when the cylinder has been bored oversize to restore a true, smooth bore surface, and standard-dimension rings can no longer maintain an adequate seal.
Part Details
| Part Number | 21E23502H7 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Piston Ring Set 0.25 O.S. |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rammers | MTX60SD |
| Rammers | MTX80SD |
| Rammers | MTX80SF |
| Rammers | MTX60SF |
| Rammers | MTX70SD |
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.
