The Multiquip SP4895 Crank Arm is a genuine OEM component designed for STOW Diaphragm Pump models SDP-3, CA90749, and SDP-2. As a direct OEM replacement, the SP4895 is manufactured to the same specifications as the original part, ensuring a correct, drop-in installation without the need to source secondary hardware. This part is sourced directly through the Multiquip OEM supply chain, so you can order with confidence knowing you are receiving an authentic replacement. Verify your model code against the fitment list — SDP-3, CA90749, and SDP-2 — before ordering to confirm compatibility.
Key Features
- Genuine OEM Construction — Manufactured to the original design tolerances that govern stroke geometry and load transfer in diaphragm pump applications.
- Direct-Fit Installation — Matches the original mounting points and pin geometry of the crank assembly, allowing straightforward swap-out during service.
- Confirmed Fitment — Compatible with STOW Diaphragm Pump models SDP-3, CA90749, and SDP-2.
- Sustained Pump Output — A correctly functioning crank arm maintains consistent stroke motion; a worn or damaged arm causes irregular diaphragm travel, uneven flow, and accelerated wear on surrounding components.
- Authentic Multiquip Part — Carries the SP4895 OEM part number, making verification against your service manual or parts diagram straightforward and accurate.
The crank arm is a core mechanical component in a diaphragm pump's drive assembly. It converts the rotational motion of the pump's drive shaft into the reciprocating linear motion that flexes the diaphragm, which in turn draws fluid in on one stroke and expels it on the next. When a crank arm wears, bends, or fails, the diaphragm cannot complete its full stroke, leading to reduced flow rate, pressure loss, and potential damage to the diaphragm itself. Replacing the crank arm with a genuine OEM part restores the correct stroke length and keeps the pump operating at rated capacity.
Part Details
| Part Number | SP4895 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Crank Arm |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-3 |
| STOW Diaphragm Pumps | CA90749 |
| STOW Diaphragm Pumps | SDP-2 |
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.
