The Multiquip 180606400 is a genuine OEM External Retaining Ring 1-1/8" designed for MQD2H, MQD3H, MQD2HA, and MQD3HA diaphragm pumps. Sourced directly from Multiquip, this retaining ring meets the exact dimensional and material specifications of the original factory component. It is a direct replacement for worn or damaged rings on the MQD2H and MQD3H series, ensuring the correct fit without modification. DHS Equipment stocks this part to help you get your pump back in service fast.
Key Features
- Genuine OEM Dimensional Accuracy — Manufactured to the exact 1-1/8" specification required to properly seat and retain shaft or bore components in Multiquip diaphragm pumps.
- Direct Drop-In Replacement — Matches the original retaining ring profile for straightforward installation using standard snap-ring pliers — no rework or fitting needed.
- Broad Diaphragm Pump Compatibility — Confirmed fitment for MQD2H, MQD3H, MQD2HA, and MQD3HA models; verify your model code before ordering.
- Maintains Positive Retention Under Load — A correctly seated retaining ring holds critical rotating or reciprocating components in axial position; a failed or missing ring can lead to rapid component migration and pump damage.
- OEM Part Assurance — Carrying the authentic Multiquip part number 180606400, this ring is traceable and verified against the original bill of materials for these pump models.
An external retaining ring is a precision-formed clip that seats into a machined groove on the outside of a shaft or pin, preventing axial movement of the components it retains. In a diaphragm pump, these rings hold bearings, pins, or actuating components in their correct working position so the pump's diaphragm can cycle properly and maintain prime. When a retaining ring is worn, deformed, or missing, the retained component can shift out of position, causing accelerated wear, loss of pumping efficiency, or mechanical failure of surrounding parts.
Part Details
| Part Number | 180606400 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | External Retaining Ring 1-1/8" |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diaphragm Pumps | MQD2H |
| Diaphragm Pumps | MQD3H |
| Diaphragm Pumps | MQD2HA |
| Diaphragm Pumps | MQD3HA |
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.
