The Multiquip 335019000 Internal Retaining Ring is a genuine OEM component designed for MQD2H, MQD3H, MQD2HA, and MQD3HA diaphragm pumps. As a direct OEM replacement, this ring is manufactured to the exact specifications required to maintain proper shaft and bearing retention inside the pump assembly. Confirm your model code against the fitment list above before ordering to ensure a direct match.
Key Features
- Genuine OEM Retention Tolerance: — Manufactured to the exact groove dimensions and spring force required to hold internal components securely under pump operating loads — no slop, no misalignment.
- Drop-In Fitment: — Engineered to seat correctly in the original retaining groove without re-machining or modification, making installation straightforward with standard snap-ring pliers.
- Verified Diaphragm Pump Compatibility: — Confirmed fit for MQD2H, MQD3H, MQD2HA, and MQD3HA models, covering both standard and HA-configuration Multiquip diaphragm pump variants.
- Sustained Pumping Performance: — A correctly seated retaining ring keeps internal shaft components properly located, preventing axial movement that can cause premature bearing wear, seal failure, or erratic pump output.
- OEM Part Number Assurance: — Sold under Multiquip part number 335019000, so you are ordering the exact ring specified in the original equipment documentation — no guesswork on sizing or material grade.
An internal retaining ring is a precision-formed circular clip that seats into a machined groove inside a bore or housing to lock a shaft, bearing, or pin in its correct axial position. Inside a diaphragm pump, it prevents internal rotating or reciprocating components from shifting along the shaft during operation, which is critical for maintaining consistent diaphragm stroke and pump output. When a retaining ring becomes worn, corroded, or dislodged, the resulting movement can accelerate wear on adjacent components and lead to seal failure or loss of prime.
Part Details
| Part Number | 335019000 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Internal Retaining Ring |
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.
