The MBW 18577 Base Plate Weldment is a genuine OEM replacement base plate for the MBW GP3550 forward plate compactor. This is the complete welded plate assembly — the ground-contact plate with its integrated exciter mounting pad and lift/frame attachment points — manufactured to MBW's original specifications for steel grade, plate thickness, and edge profile. It restores full compaction performance and correct exciter geometry when the original plate has been worn thin, cracked at the welds, or bent from impact.
Key Features
- Genuine MBW OEM Weldment: Factory-specified steel and weld design built for the centrifugal force output of the GP3550 exciter.
- Complete Welded Assembly: Supplied as a finished weldment rather than a bare plate, so the exciter mounting pad and frame attachment points are already positioned to factory tolerances.
- Correct Plate Geometry: Matches the original width, length, and curved leading edge that give the GP3550 its forward travel and smooth climb over granular material.
- Direct Bolt-On Replacement: Uses the existing exciter and shock-mount hardware locations, so the machine goes back together without drilling or modification.
- Restores Compaction Output: A worn or cracked base plate flexes under load and bleeds off vibration energy; a new weldment returns the full impact force to the ground.
On a forward plate compactor such as the GP3550, the base plate is both the working surface and the structural foundation for the exciter. Every cycle of the eccentric weight is transmitted through the plate into the soil or asphalt, and the plate takes continuous abrasion from aggregate, curb strikes, and rebar contact. Over time the plate thins at the leading edge and corners, and fatigue cracks develop around the exciter mounting pad. Continuing to run a cracked plate risks separating the exciter from the plate under load. Inspect the plate for cracking at every service, and replace the weldment when the plate is worn through, cracked at any weld, or bent enough that the machine no longer tracks straight.
Part Details
| Part Number | 18577 |
| Brand | MBW |
| Part Type | Genuine OEM |
| Description | Base Plate, Weldment, GP3550 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Forward Plate Compactor | GP3550 |
Verify Before You Order
Base plates are model- and revision-specific; confirm part number 18577 against your machine's model and serial number in the MBW parts diagram, or contact our team to verify fitment. Note that MBW charges a $12.00 drop-ship fee on factory-direct parts, which is reflected in the shipping cost at checkout.
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.
