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510022 OEM Technologies Rear Facing Axial Cam 7/8″ Shaft Pump 2400 PSI 2.4 GPM
| Part Number | 510022 |
| Brand | OEM Technologies |
| Item Weight | 5 lbs |
| Mounting Orientation | Vertical |
| Part Type | Pressure Washer Pump |
| Max Pressure | 2400 |
| 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 510022 is a vertically mounted axial cam pump rated at 2,400 PSI and 2.0 GPM, built as a direct OEM replacement for Simpson, Craftsman, and other major pressure washer brands. It features a 7/8" hollow shaft for broad engine compatibility, comes fully plumbed with all hoses and fittings for a straightforward swap, and uses a maintenance-free die-cast aluminum crankcase that never requires an oil change — keeping upkeep minimal and downtime low.
- 2,400 PSI / 2.0 GPM - vertically mounted axial cam design
- Maintenance-free crankcase - no oil changes required, corrosion-resistant die-cast aluminum construction
- Fully plumbed, bolt-on install - 7/8" hollow shaft fits standard SAE bolt pattern, compatible with Simpson, Craftsman, and more
Part numbers 510017, 90027 are other numbers used for the same product as 510022. These are alternative part numbers used to identify this product.
| Alternate Part # | Equivalent To | Status |
|---|---|---|
| 510017 | = 510022 | Same Product |
| 90027 | = 510022 | 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.
Inlet and outlet ports face the rear of the pump—opposite the engine side. On some pressure washer configurations, this means the ports point inward toward the frame rather than outward for easy hose access.
Verify the orientation of your current pump. Rear facing would mean the inlet/outlet ports face away from your engine's spark plug and towards the rear axle.
The chemical injector operates on a narrow pressure differential to generate suction. Inside the aluminum manifold is a spring-loaded steel check ball that regulates soap draw. Detergent residue or buildup on the aluminum seat causes the ball to seize stopping chemical injection.
Remove the chemical injector, careful not to lose the spring and ball. Clean the injector and rinse with warm water.
The pump's outlet threads are made from soft aluminum, while most hose fittings are brass. These two metals don't play well together. Brass is significantly harder, so repeated connections or even one slightly crooked attachment can strip the aluminum threads permanently, causing leaks that can't be fixed without replacing the manifold.
To help reduce this we recommend using Anti-Seize or Teflon tape on the threads to prevent corrosion and thread locking.