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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8
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Description
Simpson 90039 4000 Psi 3.3 Gpm AAA Technologies Triplex Plunger Pump KitFeatures 4000 PSI @ 3. 3 GPM PowerBoost Technology Fully adjustable unloader system with ergonomic control Sight glass and advanced oil seal technology, does away with the need for a dipstick Thermal relief protection to prevent pump overheating Dual oversized radial ball bearings are installed for better wear, friction resistance and precision ceramic coated pistons for extended seal life Crankcase is manufactured from fully anodized die cast
Features
- 4000 PSI @ 3.3 GPM
- PowerBoost Technology
- Fully adjustable unloader system with ergonomic control
- Sight glass and advanced oil seal technology, does away with the need for a dipstick
- Thermal relief protection to prevent pump overheating
- Dual oversized radial ball bearings are installed for better wear, friction resistance and precision ceramic coated pistons for extended seal life
- Crankcase is manufactured from fully anodized die cast aluminum for corrosion protection and is sealed to prevent contamination and lube failure
- Gas engine flange and hollow shaft that fits most horizontal shaft engines
What's in The Box
- AAA Triplex Plunger Pump
- Inlet/Outlet Connections
- Siphon Tube w/ Filter
- New Mounting Bolts
- Shaft Key
- Owner's Manual
Warranty
- 5-Year Limited Factory Warranty
- 30 Day Satisfaction Guaranteed
Specifications
| Sku | 90039 |
| Brand | Simpson |
| Max. Pressure | 4,000 Psi |
| Gallons Per Minute | 3.3 Gpm |
| Inlet Port | 3/4 in. GH |
| Discharge Port | 3/8 in. Quick Connect Female |
| Inlet Pressure Range | 10-60 Psi |
| Thermal Relief Port | 1/2 in. NPT |
| Shaft Diameter | 24mm |
| Key Way | M8 |
| Pump Oil Capacity | 11 fl-oz. |
| Powerboost | Yes |
| Head Material | Brass |
| Shipping Weight | 15 lbs. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 2
The concept is great, the item is sub par.
Size: Fit for Silverado 2020-2025 GMC Sierra 2019-2121
I bought this for a 2021 Silverado WT thinking I'd be able to screw this into the dash cubby as the adhesive wouldn't servive -50⁰ F Fairbanks winters. Beware, if you own this truck, you have to remove the entire dash assembly to include instrument cluster and infotainment system in order to screw this into the cubby. The cubby on this model is actually apart of the entire upper dash panel and cannot be removed separately as the instructions state.
I decided I'd give the adhesive pad a try until I bought some self tapping screws but the mount is not contoured like my cubby, therefore it badly rocks.
I don't recommend this to anyone with a 2021 Silverado WT unless they want to spend over 3 hours installing this.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Highly recommend
Size: Fit for Silverado 2020-2025 GMC Sierra 2019-2121
Great fit, looks awesome! Very easy to install !
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Affordable and well built
Size: Fit for Silverado 2020-2025 GMC Sierra 2019-2121
Perfect fit and well built, saved alot of money going with this!!!! Will be using for GoPros on hunting and camping trips.
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Reviewed in the United States on March 17, 2026
★★★★★ 3
Expected more for the price.
Size: Fit for Silverado 2020-2025 GMC Sierra 2019-2121
Arms are a bit short, and within a week, I could already feel the springs feeling a bit ridged. Holds well and does the job. Looks nice to!
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Works better than expected. Very good
Color: Black, Color: Black
Very nice fit and finish. Feels very high quality. Phone charges very quickly and doesn’t heat up as much. It charges through my heavy duty case that i thought i would have to replace as it doesn’t charge on other charges that ive tested. Very impressed.
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Reviewed in the United States on March 3, 2026