The Multiquip Y0378500800 is a genuine OEM Crank Vent Foam Insulation designed for DCA125SSIU4F and DCA400SSI4F series ultra-silent diesel generators. As a direct OEM replacement, this part is manufactured to the same specification as the original component, ensuring a proper fit within the generator enclosure without modification. Compatible across the DCA400SSI4F family — including the DCA400SSI4F3, DCA400SSI4F3PB, DCA400SSI4F3PD, and DCA400SSI4F3B variants — this insulation piece is the correct part for maintaining the integrity of the crankcase ventilation system on these units. Sourced directly through DHS Equipment, Y0378500800 is an authorized Multiquip OEM part backed by the manufacturer.
Key Features
- Genuine OEM Material Composition — Manufactured from the same foam grade as the original, maintaining the correct compression and sealing characteristics for crankcase vent isolation.
- Drop-In Enclosure Fit — Matches the original profile exactly, seating into the generator enclosure housing without trimming or reworking surrounding components.
- Broad DCA Series Compatibility — Fits DCA125SSIU4F, DCA400SSI4F, DCA400SSI4F3, DCA400SSI4F3PB, DCA400SSI4F3PD, and DCA400SSI4F3B models.
- Crankcase Ventilation Integrity — Keeps crankcase vapors properly directed through the vent path; deteriorated or missing foam allows uncontrolled vapor migration that can contaminate surrounding components and affect enclosure acoustics.
- Acoustic Enclosure Performance — Maintains the sound-dampening design of the ultra-silent enclosure by sealing gaps around the vent passage, preserving the low-noise output these generators are rated for.
The crank vent foam insulation serves as a sealing and isolation layer around the crankcase ventilation passage within the generator's sound-attenuating enclosure. It prevents crankcase blow-by vapors from escaping into unintended areas of the enclosure, which can degrade nearby materials, introduce oil mist to air passages, and compromise the acoustic performance of the unit. When this foam deteriorates — through heat cycling, age, or oil saturation — it loses its ability to seal effectively, making timely replacement important to keeping the ventilation circuit and enclosure performing as designed.
Part Details
| Part Number | Y0378500800 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Crank Vent Foam Insulation |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diesel Powered Generators | DCA125SSIU4F |
| Diesel Powered Generators | DCA400SSI4F3B |
| Super-Silent Generators | DCA400SSI4F3PD |
| Super-Silent Generators | DCA400SSI4F |
| Super-Silent Generators | DCA400SSI4F3 |
| Super-Silent Generators | DCA400SSI4F3PB |
| Diesel Powered Generators | DCA400SSI4F3PD (SUNBELT) |
| Diesel Powered Generators | DCA400SSI4F/4F3/4F3PB |
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.
Multiquip