The Multiquip 6643664020 Drive End Frame Assembly is a genuine OEM component designed for the DAW-500S diesel arc welder. As a direct OEM replacement sourced through Multiquip's authorized parts network, this assembly is built to the exact specifications of the original unit — ensuring correct alignment, secure mounting, and proper load transfer within the alternator end of the machine. If you're servicing a DAW-500S and need a structurally sound, factory-spec drive end frame, this is the correct part for the job.
Key Features
- Genuine OEM Structural Integrity — Machined and formed to original dimensional tolerances, ensuring the alternator rotor and bearing seat are correctly supported under load.
- Direct-Fit Replacement for DAW-500S — Matches the original mounting bolt pattern and housing geometry of the DAW-500S drive end, allowing straightforward installation without rework or shimming.
- Confirmed Fitment — Verified for the Multiquip DAW-500S diesel arc welder series.
- Protects Rotor and Bearing Alignment — A compromised drive end frame causes rotor eccentricity and premature bearing failure; replacing it with a correctly spec'd OEM unit restores proper rotational alignment and extends alternator service life.
- Electrical Output Stability — Proper frame alignment keeps air gap tolerances within spec, supporting consistent weld arc and generator output from the DAW-500S.
The drive end frame assembly forms the structural housing at the drive shaft end of the alternator or generator head. It holds the drive-side bearing in place and maintains precise concentricity between the rotor and stator — both critical for smooth rotation and stable electrical output. When the drive end frame is cracked, worn, or out of tolerance, it can allow the rotor to shift, causing vibration, bearing failure, and degraded or unstable power output. Replacing a damaged frame with a genuine OEM unit restores the mechanical foundation the entire alternator depends on.
Part Details
| Part Number | 6643664020 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Drive End Frame Assembly |
Compatibility & Fitment
| Name | Model |
|---|---|
| Welders | DAW-500S |
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.
