The Multiquip 1686104050 Main Bearing Case Assembly is a genuine OEM component designed for DLW300ES, DLW300ESA, and DLW300ESA1 diesel light welder units. As a factory-authorized part, it is manufactured to the same specifications as the original, ensuring a direct, correct-fit installation with no guesswork. DHS Equipment sources this part directly through Multiquip's OEM supply chain, so you can order with confidence knowing you're receiving an authentic replacement. Verify your model against the fitment data before ordering to confirm compatibility.
Key Features
- Genuine OEM Precision Tolerancing — Manufactured to the exact dimensional specs of the original bearing case, ensuring the crankshaft and bearing surfaces seat correctly without play or misalignment.
- Direct-Fit Installation — Matches the original bolt pattern and housing geometry of the DLW300ES series engine, so the assembly drops in as a clean swap during engine service.
- Confirmed Fitment — Engineered specifically for the DLW300ES, DLW300ESA, and DLW300ESA1 Multiquip diesel light welders.
- Engine Integrity Protection — A properly fitted main bearing case keeps the crankshaft centered and supported under load; a worn or cracked case leads to rapid bearing failure and engine damage.
- Authentic Multiquip Part — Part number 1686104050 is an OEM-verified reference, so technicians can cross-check against service manuals with full confidence in part accuracy.
The main bearing case is a structural engine component that houses and supports the crankshaft's main bearings, keeping the rotating assembly properly aligned during operation. It plays a critical role in maintaining the correct clearances between the crankshaft and bearings — if the case is cracked, warped, or worn, those clearances collapse, leading to overheating, bearing seizure, and ultimately engine failure. Replacing a damaged main bearing case with a genuine OEM unit restores the engine to its original operating tolerances and protects the investment in the rest of the drivetrain.
Part Details
| Part Number | 1686104050 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Main Bearing Case Assembly |
Compatibility & Fitment
| Name | Model |
|---|---|
| Welders | DLW300ES |
| Welders | DLW300ESA |
| Welders | DLW300ESA1 |
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.
