The Multiquip 336009490 Crank Assembly Kit is a genuine OEM component designed for MQD2HA and MQD3HA diaphragm pumps. As a factory-authorized replacement, this kit delivers the exact tolerances and material specifications required to restore correct crankshaft stroke operation in your Multiquip diaphragm pump. Confirm your model code against your equipment data plate before ordering to ensure a direct-fit installation for the MQD2HA or MQD3HA.
Key Features
- Genuine OEM Crank Tolerancing — Manufactured to Multiquip's original engineering specifications, ensuring the crankshaft geometry delivers consistent, repeatable diaphragm stroke every cycle.
- Complete Kit Format — Includes all necessary crank assembly components as a matched set, eliminating the guesswork of sourcing individual pieces and supporting a straightforward rebuild.
- Verified Fitment for MQD2HA and MQD3HA — Engineered specifically for Multiquip MQD2HA and MQD3HA diaphragm pump models; cross-reference part number 336009490 with your service manual before installation.
- Restored Pump Stroke Output — A worn or damaged crank assembly causes inconsistent diaphragm travel, reducing flow rate and pressure; replacing it with this OEM kit brings pump output back to rated performance.
- Fluid Handling Safety — Correct crank operation maintains proper diaphragm seating and prevents uncontrolled fluid bypass, which is critical when handling chemicals or hazardous liquids common in pump applications.
The crank assembly is the mechanical heart of a diaphragm pump, converting rotational power from the engine or motor into the back-and-forth linear motion that drives the diaphragm. This reciprocating action is what creates the suction and discharge strokes responsible for moving fluid through the pump. When the crank assembly wears, bends, or loses dimensional accuracy, diaphragm travel becomes uneven, leading to reduced flow, pressure drop, and accelerated diaphragm wear — making timely replacement essential to maintaining reliable pump operation.
Part Details
| Part Number | 336009490 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Crank Assembly Kit |
Compatibility & Fitment
| Name | Model |
|---|---|
| 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.
