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DWD2536 AAA Triplex Plunger 3/4” Shaft Pump 3600 PSI 2.5 GPM
| Part Number | DWD2536 |
| Brand | AAA |
| Item Weight | 12 lbs |
| Mounting Orientation | Horizontal |
| Part Type | Pressure Washer Pump |
| Max Pressure | 3600 |
| Flow Rate | 2.5 |
| Inlet Size | 3/4” Garden Hose |
| Outlet Size | M22 |
| Shaft Size | 3/4” |
| Bolt Pattern | SAE |
| Drive Key Size | 1” x 3/16” |
| Oil Capacity | 8.0 fl oz. |
The AAA DWD2536 is a certified OEM replacement horizontal triplex plunger pump rated at 3,600 PSI and 2.5 GPM, built for direct-drive gas-powered pressure washers with a 3/4" hollow shaft and SAE flange bolt pattern. It features a fully anodized die-cast aluminum crankcase, ceramic plungers, stainless steel check valves, and a built-in downstream chemical injector.
- Advanced Check Valves with Built-In Chemical Injector - Advanced check valves resist corrosion from prolonged exposure to water and detergents; the integrated downstream chemical injector allows direct soap application without additional hardware.
- Fully Adjustable Unloader with Dual Oversized Ball Bearings - Ergonomic control handle allows on-the-fly pressure regulation; dual oversized radial ball bearings reduce friction and extend pump life under sustained load.
- Oil Sight Glass with Thermal Relief Protection - Sight glass provides immediate oil level and contamination visibility without a dipstick; thermal relief valve protects internal components from heat damage during extended run times.
This part is designed to work with the engine models listed above. Engine compatibility is based on shaft size, bolt pattern, and mounting orientation.
The DWD2536 uses ceramic-coated plungers with a dual water packing stack. If the engine runs with the trigger released for more than 2 minutes, heat builds inside the brass head and degrades the rubber packings. Once the seals fail, water bypasses the plungers, enters the crankcase, and mixes with the oil — damaging the internal bearings.
Drain the oil and remove the manifold. Inspect the oil seals for scoring and other damages. If damage present, replace the seals and refill with oil.
The pump uses an integrated unloader with a built-in easy-start circuit that vents pressure during startup, allowing the engine to turn over without fighting full load. If the unloader piston seizes from dried detergent or mineral deposits, the bypass circuit fails and the pump attempts to build full 3600 PSI on the first pull—immediately locking the engine.
Remove and inspect the unloader for signs of corrosion or damage. Clean with steel wool and penetrating oil and reinstall. If issue persists, a replacement may need to be purchased.
The pump uses an integrated unloader with a built-in easy-start circuit that vents pressure during startup, allowing the engine to turn over without fighting full load. If the unloader piston seizes from dried detergent or mineral deposits, the bypass circuit fails and the pump attempts to build full 3600 PSI on the first pull—immediately locking the engine.
Remove and inspect the unloader for signs of corrosion or damage. Clean with steel wool and penetrating oil and reinstall. If issue persists, a replacement may need to be purchased.