The Multiquip SP5583 Crank Arm is a genuine OEM component designed for STOW Diaphragm Pump models SDP-2, SDP-3, and CA90749. As a factory-authorized part, the SP5583 is manufactured to the same specifications as the original, ensuring a direct, correct-fit replacement with no guesswork. This is the exact crank arm sourced from Multiquip for use in authorized service and routine maintenance on STOW Diaphragm Pumps. When your pump's crank arm shows wear or damage, replacing it with the genuine SP5583 restores proper stroke motion and keeps fluid transfer operating at rated capacity.
Key Features
- Genuine OEM Construction: — Manufactured to original Multiquip tolerances, ensuring the correct stroke geometry and load-bearing strength specific to diaphragm pump drive assemblies.
- Direct-Fit Replacement: — Mounts to the existing drive assembly on STOW Diaphragm Pumps using the original hardware and attachment points, streamlining the repair process.
- Confirmed Fitment: — Verified for use on STOW Diaphragm Pump models SDP-2, SDP-3, and CA90749.
- Restores Full Pump Stroke: — A correctly functioning crank arm delivers consistent reciprocating motion to the diaphragm, maintaining rated flow output and pump efficiency on every cycle.
- Long-Term Drive Integrity: — Genuine OEM material grade prevents premature fatigue cracking under the repeated rotational stress of continuous pump operation.
The crank arm is the mechanical link between the pump's drive shaft and the diaphragm assembly. As the drive shaft rotates, the crank arm converts that rotational motion into the back-and-forth stroke that flexes the diaphragm and moves fluid through the pump. When the crank arm wears, bends, or fails, the diaphragm stroke becomes inconsistent or stops entirely, resulting in reduced flow, pressure loss, or a complete pump-out failure. Replacing a worn crank arm with the correct OEM part — the Multiquip SP5583 — restores the precise stroke length the pump was engineered to deliver.
For fitment questions or to confirm this part is right for your machine, contact the DHS Equipment parts team.
Part Details
| Part Number | SP5583 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Crank Arm |
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.
