The Multiquip 28423403H3 Piston 0.50MM is a genuine OEM piston designed for MTR40SF, MTR40F, and MT55F trench rammers. As a factory-sourced component, it is manufactured to the exact dimensional tolerances required by the original engine specification, ensuring a correct fit within the cylinder bore without modification. This 0.50MM oversize designation makes it the correct choice when the cylinder has been bored out to accept a larger piston during engine rebuild. Confirm your cylinder bore size before ordering to ensure this is the right oversize grade for your application.
Key Features
- Oversize-Specific Tolerancing: — The 0.50MM oversize spec matches cylinders that have been bored to accept a larger piston, maintaining proper compression and ring seal after a rebuild.
- Genuine OEM Component: — Sourced directly from Multiquip, this piston meets the original design specification for combustion chamber geometry and skirt clearance on these rammer engines.
- Direct Engine Rebuild Fit: — Engineered to drop into a properly prepared bore on MTR40SF, MTR40F, and MT55F rammers, pairing correctly with the original connecting rod and wrist pin setup.
- Compression Integrity Restored: — A worn or out-of-spec piston causes loss of compression, hard starting, and reduced impact energy at the shoe — replacing it with the correct oversize piston restores full tamping output.
- Engine Safety and Longevity: — Using the correctly sized OEM piston prevents blow-by, overheating, and accelerated cylinder wear that result from running an improperly fitted replacement.
The piston is the reciprocating component inside the engine cylinder that converts combustion pressure into mechanical force, driving the rammer's impact mechanism. In a rammer, consistent piston performance is critical — a worn piston reduces compression, which directly weakens the foot's strike force and makes the engine difficult to start. An oversize piston like the 0.50MM variant is used specifically after a cylinder bore has been machined to a larger diameter, restoring the tight clearance needed for efficient combustion and long engine life.
Part Details
| Part Number | 28423403H3 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Piston 0.50MM |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rammers | MTR40SF |
| Rammers | MTR40F |
| Rammers | MT55F |
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.
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