Multiquip 1739196160 Expansion Plug

The Multiquip 1739196160 Expansion Plug is a genuine OEM component designed for DLW400ES, DLW400ESA, and DLW400ESA1 series diesel light welders. As a direct OEM replacement sourced through Multiquip's authorized parts program, this plug is manufactured to the same specification as the original, ensuring a correct, secure fit within the engine block. DHS Equipment supplies this part to keep your welder running at full capacity with no guesswork on compatibility.

Key Features

• Genuine OEM Construction — Manufactured to original equipment specification, delivering the same sealing integrity and dimensional accuracy as the factory-installed plug.
• Direct Engine Block Fit — Engineered to seat correctly in the D1403 and V2203 engine cores used across DLW400ES series machines, requiring no rework or modification to the bore.
• Confirmed Fitment — Compatible with DLW400ES, DLW400ESA, and DLW400ESA1 diesel light welder models.
• Leak-Free Sealing — A properly seated expansion plug maintains coolant and oil containment within the engine block; a failed or corroded plug can lead to fluid loss and overheating under load.
• Fuel and Coolant System Integrity — Replacing a compromised expansion plug promptly prevents internal engine contamination and protects critical components from thermal damage during welding operations.

An expansion plug — sometimes called a freeze plug or core plug — is pressed into machined openings in the engine block left over from the casting process. Its primary role is to seal these cavities and maintain the integrity of the engine's cooling passages. When an expansion plug corrodes, cracks, or is displaced, coolant can escape the block, leading to rapid overheating and potential engine damage if the machine continues to operate.

For questions about fitment or to confirm this is the correct part for your machine, contact the DHS Equipment team before ordering.

Part Details

Compatibility & Fitment

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.