The Multiquip 28423402H3 Piston 0.25MM is a genuine OEM replacement component designed for MT55F, MTR40F, and MTR40SF rammers. Sourced directly from Multiquip, this 0.25MM oversized piston is engineered to restore engine compression and output to original operating specifications after cylinder wear or a top-end rebuild. If your rammer is losing power, burning oil, or showing signs of piston wear, 28423402H3 is the correct OEM solution for these models.
Key Features
- OEM-Grade Dimensional Accuracy — Cast and machined to Multiquip's exact 0.25MM oversize specification, ensuring correct ring-to-wall clearance and compression seal in the cylinder bore.
- Drop-In Rebuild Fitment — Sized specifically for the MT55F, MTR40F, and MTR40SF rammer engine bores machined to the 0.25MM oversize, pairing directly with corresponding oversize rings and pin.
- Restores Full Compaction Power — A worn or scuffed piston reduces stroke force and tamping energy; replacing it with 28423402H3 brings the rammer back to rated impact output for effective soil compaction.
- Genuine Multiquip OEM Part — Manufactured to the same material and heat-treatment standards as the original, supporting long service life in the high-cycle, high-temperature environment of a rammer engine.
- Compatible Across the MT and MTR Rammer Lines — Verified fitment for the MT55F tamper and MTR40F and MTR40SF trench rammer models.
The piston is the reciprocating heart of a rammer's two-stroke or four-stroke engine, converting combustion pressure into the downward force that drives the foot plate into the ground. In a rammer, pistons operate under extreme repetitive stress — high cycle rates combined with heat and side loading accelerate wear faster than in conventional small engines. When a piston becomes worn, scored, or out of tolerance, compression drops, the engine loses power, and fuel consumption rises. Replacing the piston with the correct oversized component after a bore hone is a fundamental part of any rammer top-end rebuild, and using the right OEM part ensures the engine returns to full rated performance.
Part Details
| Part Number | 28423402H3 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Piston 0.25MM |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rammers | MT55F |
| Rammers | MTR40F |
| Rammers | MTR40SF |
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.
