The Multiquip 335419300 Input Pinion Ball Bearing Sealed is a genuine OEM component designed for MQD2H and MQD3H diaphragm pumps. As a factory-sourced part, it meets the exact tolerancing and load ratings specified for the input pinion assembly, ensuring consistent rotational performance under operating conditions. This bearing is the correct direct replacement for MQD2H and MQD3H units and installs in place of the original without modification to the surrounding assembly.
Key Features
- OEM-Grade Precision Tolerancing — Manufactured to the exact radial clearance and load rating required at the input pinion position, maintaining smooth power transfer through the drive assembly.
- Sealed Construction — The integrated seals retain lubrication and block contaminant ingress, extending service intervals in the wet and abrasive environments typical of diaphragm pump operation.
- Direct Fitment for MQD2H and MQD3H — Confirmed OEM replacement for Multiquip MQD2H and MQD3H diaphragm pumps, dropping into the original bearing seat without additional machining or adaptation.
- Protects Drive Train Integrity — A worn or failed input pinion bearing introduces play into the gear mesh, accelerating pinion wear and causing vibration; replacing it promptly restores proper drive alignment and load distribution.
- Genuine Multiquip OEM Part — Sourced directly from Multiquip, part 335419300 carries the full OEM part number for confident cross-referencing against your service manual or parts diagram.
The input pinion ball bearing supports the input pinion shaft within the pump's gear drive assembly, carrying both radial and axial loads generated during operation while allowing the shaft to rotate freely with minimal friction. In a diaphragm pump, this bearing transmits power from the drive source to the diaphragm actuation mechanism, so its condition directly affects stroke consistency and overall pump output. When the bearing wears or loses its seal, increased play and heat buildup follow, which can lead to accelerated gear wear and ultimately drive assembly failure if left unaddressed.
Part Details
| Part Number | 335419300 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Input Pinion Ball Bearing Sealed |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diaphragm Pumps | MQD2H |
| Diaphragm Pumps | MQD3H |
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.
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