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510005 OEM Technologies Rear Facing Axial Cam 7/8″ Shaft Pump 3400 PSI 2.5 GPM
| Part Number | 510005 |
| Brand | OEM Technologies |
| Item Weight | 5 lbs |
| Mounting Orientation | Vertical |
| Part Type | Pressure Washer Pump |
| Max Pressure | 3400 |
| Flow Rate | 2.5 |
| 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 510005 OEM Technologies pump is a vertical shaft axial cam pump designed as a dependable, low‑maintenance replacement for residential pressure washers. It uses a sealed, maintenance free design that removes the need for oil changes, and its internal components are built to deliver steady, reliable pressure for cleaning concrete, siding, vehicles, and other outdoor surfaces. A built in thermal relief valve protects the pump from heat damage during long idle periods by releasing overheated water, helping extend the life of the seals and internal parts. The pump includes standard M22 and garden hose connections for broad compatibility, and its direct drive vertical shaft layout allows quick installation on most small gas engines used in consumer pressure washers.
- 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 90027 is another number used for the same product as 510005. These are alternative part numbers used to identify this product.
| Alternate Part # | Equivalent To | Status |
|---|---|---|
| 90027 | = 510005 | 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.
When you release the trigger, the unloader valve is supposed to open and recirculate water to relieve pressure. If that valve sticks or fails, pressure has nowhere to go and the pump stays under full load leading to the engine bogging down or stalling.
Inspect the unloader for corrosion or damage. Ensure that the pin moves freely and the unloader seat ball is not stuck. Clean with steel wool or replace if needed.
The manufacturer update the body style away from the round base to the lighter 3-legged version.
If the original pump was rear facing, yes it will work. Spacers may be needed to ensure clearance of the inlet and outlet ports.
The manufacturer moved this pump's crankcase away from the round base to the new 3-legged version.
Only the crankcase housing has changed. The manifold and internal components are still the same for both versions.