Multiquip 2742350207 Piston Ring Set 0.25mm

The Multiquip 2742350207 Piston Ring Set 0.25mm is a genuine OEM component designed for MT54F, MT55F, and MTR40F series rammers. This is a 0.25mm oversized ring set, engineered to restore proper bore-to-ring fit during engine rebuilds where the cylinder has been bored or honed beyond the standard dimension. Sourced directly from Multiquip, it delivers the exact tolerances and material specifications required by the engine design. Confirm your cylinder bore measurement before ordering to ensure the 0.25mm oversize corresponds to your engine's current specification.

Key Features

• Oversize Rebuild Precision — Sized at 0.25mm over standard to match a bored or honed cylinder, restoring proper ring-to-wall contact and compression seal.
• Genuine OEM Construction — Manufactured to the same material grade and tension spec as the original rings, ensuring correct sealing pressure and heat transfer in the engine bore.
• Direct Engine Fit — Engineered specifically for the engine configuration used in MT54F, MT55F, and MTR40F rammers, dropping into place during a standard piston assembly without modification.
• Compression and Oil Control Restored — A correctly fitted ring set re-establishes combustion chamber sealing and controls oil consumption, returning the rammer to full stroke power and consistent fuel combustion.
• Fuel System Integrity — Worn or broken rings allow combustion gases to blow past the piston, fouling the crankcase with exhaust gases and degrading engine oil — replacing the ring set at rebuild prevents this cycle from continuing.

Piston rings seal the gap between the piston and the cylinder wall, keeping combustion pressure above the piston where it drives the power stroke and preventing engine oil from entering the combustion chamber. In a rammer engine, where the unit operates under constant high-frequency loading, rings wear over time — leading to lost compression, increased oil consumption, and reduced tamping force. A 0.25mm oversize set like the Multiquip 2742350207 is used when the cylinder bore has been machined slightly beyond its original diameter, restoring the correct ring-to-wall clearance that a standard-size set can no longer provide.

For fitment questions or help confirming the right oversize for your engine, contact DHS Equipment directly.

Part Details

Compatibility & Fitment

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.