Multiquip 21E23503H7 Piston Ring Set 0.50 O.S.

The Multiquip 21E23503H7 is a genuine OEM Piston Ring Set 0.50 O.S. designed for MTX-series rammers including the MTX60SD, MTX60SF, MTX70SD, MTX80SD, and MTX80SF. As a factory-original component, it delivers the exact dimensional tolerances and material spec required to restore proper compression and piston-to-bore sealing in these machines. This oversize set is intended for engines that have been bored out to the 0.50 mm oversize specification, making it the correct choice after a cylinder bore resurfacing service. Order with confidence knowing 21E23503H7 is the direct OEM replacement sourced for these Multiquip tamper models.

Key Features

• OEM Compression Integrity — Manufactured to the exact ring gap, tension, and profile spec required for MTX-series rammer engines, ensuring proper cylinder sealing after a bore job.
• 0.50 mm Oversize Fitment — Sized specifically for cylinders that have been rebored to the 0.50 O.S. dimension; drops in correctly without further machining when the bore is within spec.
• Confirmed Rammer Compatibility — Verified for MTX60SD, MTX60SF, MTX70SD, MTX80SD, and MTX80SF tampers, covering the core MTX walk-behind rammer lineup.
• Restored Engine Power Output — Worn or broken piston rings allow blow-by gases past the piston, robbing the rammer of the compression it needs to deliver consistent impact force; a fresh set restores full stroke energy.
• Genuine Multiquip OEM Part — Supplied as an authentic OEM component, so the ring set matches the original material grade and cross-section profile specified for the engine design.

Piston rings seal the gap between the piston and the cylinder wall, preventing combustion gases from escaping past the piston and keeping engine oil out of the combustion chamber. In a rammer, this seal is critical because the engine must generate a precise, high-pressure power stroke to drive the tamping foot with consistent force. When rings wear, crack, or lose tension, compression drops, the engine runs poorly or loses power, and oil consumption increases — symptoms that signal it is time for a ring replacement, typically performed alongside a cylinder bore service.

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.