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510030 OEM Technologies Rear Facing Axial Cam 7/8″ Shaft Pump 3100 PSI 2.4 GPM
| Part Number | 510030 |
| Brand | OEM Technologies |
| Item Weight | 5 lbs |
| Mounting Orientation | Vertical |
| Part Type | Pressure Washer Pump |
| Max Pressure | 3100 |
| Flow Rate | 2.4 |
| Inlet Size | 3/4” Garden Hose |
| Outlet Size | M22 |
| Shaft Size | 7/8" |
| Bolt Pattern | 3-Leg SAE Rear Face |
| Drive Key Size | 1" x 3/16" |
| Oil Capacity | 6.0 fl oz. |
The 510030 OEM Technologies pump is a residential class axial cam pump engineered for reliable performance in light‑duty pressure washer applications. It features a maintenance‑free design with a sealed crankcase, eliminating the need for oil changes. The pump incorporates an axial cam design, high‑strength polymer pump housing, and stainless‑steel internal components to ensure consistent pressure output and extended service life. An integrated thermal relief valve protects the pump from overheating during bypass operation, while the standard M22 outlet and 3/4" garden‑hose inlet provide universal compatibility with most consumer pressure washer systems. Designed for direct‑drive configurations, the 510030 mounts easily to vertical‑shaft gas engines and delivers stable operating pressure suitable for cleaning driveways, siding, vehicles, and general outdoor surfaces.
- Maintenance free axial cam pump - Sealed design eliminates oil changes and reduces long term upkeep for the user.
- Built in thermal relief valve - Automatically releases overheated water to prevent internal damage during extended idle time.
- Direct drive vertical shaft design - Fits most residential gas pressure washers and installs quickly with standard mounting patterns.
Part numbers 510026, 4100026, 4100030, 90026 are other numbers used for the same product as 510030. These are alternative part numbers used to identify this product.
| Alternate Part # | Equivalent To | Status |
|---|---|---|
| 510026 | = 510030 | Same Product |
| 4100026 | = 510030 | Same Product |
| 4100030 | = 510030 | Same Product |
| 90026 | = 510030 | Same Product |
This part is designed to work with the engine models listed above. Engine compatibility is based on shaft size, bolt pattern, and mounting orientation.
Non-winterized pumps are prone to corroded or "stuck" unloader valves or damage to the pressure valves.
Inspect the unloader first, ensure the pin moves freely and ball under the seat is not stuck. If not, remove the manifold and inspect the pressure valves for debris or damage.
If water is left in the pump over the winter it can freeze and crack the manifold or crankcase.
Locate the crack. If it's on the manifold that's replaceable. If the crack is on the crankcase and you're seeing a milky oil-water mix, the pump is likely needs to be replaced.
The manufacturer has sold this pump under multiple part numbers.
Any AAA/OEM Technologies pump starting with 900xx is a kit — includes mounting hardware, drive key, and usually a siphon hose. Known equivalent numbers: 510026, 510030, 4100026, 4100030, and 90026.