The Multiquip EM492625 Lock Washer is a genuine OEM component designed for EM900SD, AR13D, C30HDG, and C30HDZ series equipment. As a factory-authorized replacement, this lock washer meets the original design specifications for the applications it serves across Multiquip's mixer, roller, and concrete pump product lines. Keep EM492625 on hand as a routine service item — fastener hardware like this is commonly replaced during scheduled maintenance and reassembly work.
Key Features
- Genuine OEM Hardness and Temper — Manufactured to the original material spec, so the washer bites and holds under torque the same way the factory-installed part does.
- Direct Bolt-On Replacement — Matches the original inside diameter, outside diameter, and tooth profile for drop-in installation with no sizing adjustments.
- Broad Multiquip Fitment — Confirmed for EM900SD mixers, AR13D asphalt rollers, and C30HDG and C30HDZ concrete pump models.
- Prevents Fastener Backout — The locking teeth grip both the mating surface and the fastener, resisting vibration-induced loosening in high-cycle operating environments.
- Critical Fastener Safety — On rotating assemblies and pressurized systems, a failed or missing lock washer can allow fasteners to back out under load; using the correct OEM-spec part maintains the integrity of the joint.
A lock washer is a thin hardened ring with serrated or split edges that sits between a fastener and the surface it clamps. Under torque, the teeth or split ends bite into both surfaces, creating resistance that prevents the bolt or nut from loosening due to vibration and cyclical loading. On equipment that runs with constant vibration — such as compactors, rollers, and concrete pumps — even a single loose fastener can lead to accelerated wear, misalignment, or mechanical failure of adjacent components. Replacing worn or damaged lock washers with the correct OEM part is a straightforward step that protects the integrity of the entire assembly.
For questions about fitment or to confirm this part is correct for your specific serial number, contact the DHS Equipment parts team before ordering.
Part Details
| Part Number | EM492625 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Lock Washer |
Compatibility & Fitment
| Name | Model |
|---|---|
| Essick Mixers | EM900SD |
| Rollers | AR13D |
| Mayco Pumps | C30HDG |
| Mayco Pumps | C30HDZ |
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.
