The Multiquip 1125630351 is a genuine OEM Lower Valve Seat designed for DCA-series ultra-silent diesel generator models including DCA40SSAI, DCA45SSIU2, and DCA60SSAI. As a direct OEM replacement sourced through Multiquip's authorized parts network, this component meets the original engineering specifications for the engine's valve train assembly. Correct fitment has been confirmed across the DCA40SSI, DCA45SSIU2-GEER, and DCA45SSIU2-FEMA variants, making this a versatile choice for fleet operators managing multiple DCA-series units. Order with confidence knowing you are receiving the exact part the equipment was built with.
Key Features
- OEM-Grade Seat Material — Manufactured to the hardness and dimensional tolerances required for consistent valve sealing in diesel engine applications, preventing compression loss over extended service cycles.
- Drop-In Engine Fitment — Machined to the exact seat diameter and depth of the original, allowing direct installation into the cylinder head without reworking the valve pocket.
- Broad DCA-Series Compatibility — Confirmed fit across DCA40SSAI, DCA40SSI, DCA45SSIU2, DCA45SSIU2-GEER, DCA45SSIU2-FEMA, and DCA60SSAI ultra-silent generator models.
- Combustion Integrity — A properly seated valve seat maintains the tight seal needed for full compression and efficient fuel combustion; a worn or damaged seat causes misfires, power loss, and increased fuel consumption.
- Critical Fuel System Safety — Valve seat integrity directly affects combustion chamber sealing; using a dimensionally correct OEM seat reduces the risk of blow-by and uncontrolled combustion events in generator applications.
The lower valve seat is a precision-machined ring pressed into the cylinder head that provides the hardened seating surface against which the engine's intake or exhaust valve closes. Each time the valve shuts, it contacts this seat to form an airtight seal that contains combustion pressure inside the cylinder. When the seat becomes worn, pitted, or cracked, the valve can no longer seal properly, leading to compression loss, rough running, overheating, and ultimately engine damage. Replacing it with a correctly dimensioned OEM part restores the sealing surface and returns the engine to full operating efficiency.
Part Details
| Part Number | 1125630351 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Lower Valve Seat |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diesel Powered Generators | DCA40SSAI |
| Diesel Powered Generators | DCA45SSIU2 |
| Diesel Powered Generators | DCA60SSAI |
| Diesel Powered Generators | DCA40SSI |
| Diesel Powered Generators | DCA45SSIU2-GEER |
| Diesel Powered Generators | DCA45SSIU2-FEMA |
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.
