The Multiquip SP5581 Connecting Rod Bearing is a genuine OEM component designed for STOW Diaphragm Pump models SDP-2, SDP-3, and CA90749. As a direct OEM replacement, SP5581 meets the original engineering specifications for these pumps, ensuring the connecting rod assembly operates with the correct tolerancing and load capacity. Sourced directly through Multiquip's authorized parts network, this bearing is verified to fit and function as intended on compatible STOW Diaphragm Pump models.
Key Features
- OEM-Grade Bearing Tolerancing — Manufactured to original specifications, delivering the precision fit the connecting rod assembly requires to handle cyclic pump loads without accelerated wear.
- Direct Drop-In Replacement — Designed to seat into the connecting rod housing the same way as the original, keeping reassembly straightforward with no custom fitting or machining.
- Confirmed Fitment — Compatible with STOW Diaphragm Pump models SDP-2, SDP-3, and CA90749; verify your model before ordering.
- Sustained Pump Stroke Integrity — A correctly functioning connecting rod bearing maintains smooth, consistent reciprocating motion; a worn bearing introduces slop and vibration that degrades diaphragm life and flow output.
- Genuine Multiquip OEM Part — Part number SP5581 is sourced through Multiquip's authorized supply chain, so you receive the same component installed at the factory.
The connecting rod bearing sits between the crankshaft and the connecting rod, allowing the rod to pivot smoothly as the crank rotates and converts that rotational motion into the reciprocating stroke that drives the diaphragm. This bearing absorbs the continuous load cycling generated during pump operation, and its condition directly affects how evenly and efficiently the diaphragm moves fluid. When the bearing wears, it introduces play into the connecting rod, which causes uneven diaphragm deflection, increased vibration throughout the pump body, and ultimately accelerated failure of surrounding components.
DHS Equipment is an authorized Multiquip parts dealer. If you need help confirming fitment for your STOW Diaphragm Pump, contact our parts team with your model and serial number before ordering.
Part Details
| Part Number | SP5581 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Connecting Rod Bearing |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-2 |
| STOW Diaphragm Pumps | SDP-3 |
| STOW Diaphragm Pumps | CA90749 |
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.
