Match the part number, measurements and connection points that apply to your trailer.
| Capacity | Verify the required rating. |
|---|---|
| Mount | Confirm A-frame, swivel, weld-on, bolt-on or other mounting style. |
| Travel | Confirm lift and clearance. |
The Stillwell SJP-320 hydraulic power unit delivers reliable Power Up / Power Down functionality for dump trailers, lifts, and utility applications requiring dependable 3000 PSI output. Its compact vertical design and bi-directional brushless motor ensure efficient, consistent performance in a rugged and easy-to-install form. Ideal for new builds or replacement systems needing smooth hydraulic control and quick cycle times.
| Specification | Detail |
|---|---|
| Manufacturer | Stillwell Inc. |
| Model / Part Number | SJP-320 |
| Operating Voltage | 12 V DC |
| Working Pressure | 3000 PSI |
| Flow Rate | 3 GPM ( Gallons Per Minute ) |
| Motor Type | Bi-Directional Brushless Motor |
| Tank Capacity | 2 Liters (? 2.2 Quarts) |
| Ports | #4 SAE Hydraulic Ports |
| Mount Hole Spacing | 60 mm ( 2.36 in ) |
| Dimensions | 16? H × 7? D × 5? W |
| Orientation | Vertical – Tank Below Pump |
| Weight (Approx.) | 37 lbs |
| Warranty | 2-Year Limited Warranty |
| Item | Quantity |
|---|---|
| Stillwell SJP-320 Hydraulic Pump Assembly | 1 |
| Corded Remote with Hold & Magnetic Back | 1 |
| 2 Liter Hydraulic Tank (Installed) | 1 |
| Manual Override Lever Assembly | 1 |
Each Stillwell SJP-320 unit is tested to meet or exceed industry performance standards and arrives ready for wiring and hydraulic hookup. This model is ideal for utility, dump, or equipment trailers requiring consistent hydraulic power in a small footprint. Compatible with most 12 V systems – professional installation recommended.
Retail Price: $475.00 | Weight: 37 lbs | Free UPS Ground Shipping Included
Selected from R&P customer feedback for Trailer Jack products and related trailer service.
“Received swivel d-ring tie down 4 days after my wife ordered them , great price and came with backing plates. I received exactly what I paid for, thanks for the great service. Chris Davis , Mooresville NC”
“Would like to say thanks to everyone at R and P Carriages parts were delivered fast and with the very helpful staff, the right parts were sent the first time. Thanks Happy Holiday's.”
“I've ordered lots of trailer repair parts from them, always fast service, well packed, and the right parts. I highly recommend.”
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