Choosing a 12V hydraulic power unit for your dump trailer comes down to one key question: do you need the pump to push the load up and also control it on the way down, or is a single-acting lift enough? The two options here are a 20-quart double acting unit and a smaller single acting pump, and they sit at opposite ends of the price scale. One gives you a much bigger reservoir and powered lowering; the other keeps the cost and the footprint down. Here's how they compare when you're matching a pump to your trailer.
Quick Verdict
For a dump trailer that will see frequent lifting and you want controlled power-down, the 20 Quart Double Acting Hydraulic Pump at $240.00 is the stronger pick. It carries a 20-quart metal tank, a 1.6 kW motor, and a remote pendant. If you're more budget-conscious and only need the lift direction, the $143.99 Single Acting Hydraulic Power Unit offers a compact build, a 10-year warranty, and a noticeably smaller reservoir.
Comparison Table
| Product | Listed Price | Price Bar | Reservoir | Motor | Action |
|---|---|---|---|---|---|
| 20 Quart Double Acting Hydraulic Pump | $240.00 | 20 qt (5 gal) | 1.6 kW 12V DC | Double acting (power up/down) | |
| 12V Single Acting Hydraulic Power Unit | $143.99 | 1.5 L (1.58 qt) | 800W | Single acting |
Where Each Product Wins
- The 20 Quart Double Acting unit wins on reservoir size, motor power, and the ability to power both directions. It also includes a remote pendant and two extra SAE #6 fittings, and its port settings go up to 3200 psi on port A and 1500 psi on port B, with a 0.91 GPM flow rate. The price spread between the two units is $96.01.
- The 12V Single Acting Hydraulic Power Unit wins on price and compactness. It is the lower-cost option, carries a 10-year manufacturer warranty, and is described as a small-sized, direct replacement unit for 12V remote-controlled hydraulic systems.
Product Notes
20 Quart Double Acting Hydraulic Pump 12V DC Dump Trailer Hydraulic Power Unit

This is the higher-capacity option of the two. It uses a double-acting design, meaning it can push fluid to power the dump trailer up and also control the descent with power-down force. The 20-quart metal tank holds 5 gallons of hydraulic fluid, and the 1.6 kW 12V DC motor drives a pump rated at 3200 psi on port A and 1500 psi on port B, with a flow rate of up to 0.91 GPM. You get a 15-foot remote control pendant plus two replacement SAE #6 fittings. The metal construction emphasizes corrosion resistance and durability. Choose this unit if you want a larger oil capacity and powered lowering. The tradeoff is the higher price and the substantially larger tank, which takes up more space on the trailer.
Hydraulic Power Unit 12V, Single Acting Dump Hydraulic Pump for Dump Trailer

This single-acting power unit is the lower-priced, more compact alternative. It costs $143.99 and is built around an 800W copper-wire motor that delivers 1.1cc/r output. The 1.5L/1.58qt reservoir is much smaller than the 20-quart tank on the double-acting unit, which keeps the overall package small. It comes with a remote control system for convenient operation and is described as a direct replacement for 12V DC remote-control hydraulic setups. The unit also carries a 10-year manufacturer warranty. The main limitation is its single-acting operation: it powers the lift in one direction, so you don't get the controlled power-down capability of the double-acting pump. If your dump trailer work doesn't require powered lowering and you want to keep the budget down, this is the one to consider.
Final Choice by Use Case
Go with the 20 Quart Double Acting Hydraulic Pump if you need a larger fluid reservoir, higher motor power, and controlled lowering on a dump trailer. Its higher price reflects that extra capability. Choose the 12V Single Acting Hydraulic Power Unit if you want a compact, budget-friendlier pump and only need to power the up direction, not a forced down cycle. For many dump trailer tasks, the single-acting unit is enough, but for jobs that require more oil capacity and power-down operation, the double-acting unit earns the higher price tag.