In the hydraulics and pneumatics aisle, choosing between a hydraulic gear pump and a 12V DC power unit can feel like comparing two different languages. Gear pumps are raw hydraulic building blocks for a custom system, while power units arrive ready to bolt onto a dump trailer. If you are rebuilding a hydraulic circuit, the Dynamic Fluid Components GP-F20 gear pumps give you precise displacement options. If you need a self-contained lifting solution, the single-acting and double-acting 12V units tackle dump trailer duty. The right choice depends on whether you are assembling a system from components or replacing a complete power unit.
Quick Take
If you are building a hydraulic system from components, the Dynamic Fluid Components GP-F20 gear pumps give you two displacement choices at the same listed price. If you want a complete 12V dump trailer power unit, the single-acting option is lighter and cheaper, while the double-acting unit adds a large tank and bidirectional control.
Price Comparison
The four pumps span $143.99 to $240.00. The bar below shows the relative listed price.
| Product | Listed Price | Relative Price |
|---|---|---|
| Hydraulic Power Unit 12V, Single Acting Dump Hydraulic Pump for Dump Trailer | $143.99 | |
| Dynamic Fluid Components GP-F20-08-P1-A Hydraulic Gear Pump | $191.62 | |
| Dynamic Fluid Components GP-F20-12-P-C Hydraulic Gear Pump | $191.62 | |
| 20 Quart Double Acting Hydraulic Pump 12V DC Dump Trailer Hydraulic Power Unit | $240.00 |
The two gear pumps are priced identically, so your choice comes down to displacement and rotation direction rather than cost. The single-acting 12V unit undercuts both gear pumps, and the double-acting unit carries the highest price.
Decision Matrix
Use this quick table to match the pump to your situation.
| Use Case | Recommended Pump |
|---|---|
| Compact counter-clockwise gear pump for a custom hydraulic circuit | Dynamic Fluid Components GP-F20-08-P1-A |
| Higher-displacement clockwise gear pump for a custom circuit | Dynamic Fluid Components GP-F20-12-P-C |
| Complete 12V dump trailer lift with remote control on a budget | Hydraulic Power Unit 12V, Single Acting Dump Hydraulic Pump for Dump Trailer |
| Double-acting 12V dump trailer power unit with a 20-quart tank | 20 Quart Double Acting Hydraulic Pump 12V DC Dump Trailer Hydraulic Power Unit |
Product Notes
Dynamic Fluid Components GP-F20-08-P1-A Hydraulic Gear Pump
If you are assembling a high-pressure gear pump section, this pump gives you a compact 0.48 cubic inch displacement with a 3/4-inch straight drive shaft and counter-clockwise rotation. Its SAE-12 inlet and SAE-10 outlet ports are clearly sized for a 3650 psi circuit. The aluminum center section and cast iron end plates are typical for this pump family, but this is a bare pump, not a complete power unit, so you'll need a mounting flange, reservoir, and motor to make it run. If your circuit needs clockwise rotation, this pump will not work without a different shaft or rotation configuration.
Dynamic Fluid Components GP-F20-12-P-C Hydraulic Gear Pump
For a gear pump with more flow, this model ups displacement to 0.73 cubic inches per revolution and turns clockwise. The 5/8-inch straight shaft and SAE-12 inlet/SAE-10 outlet match a standard gear pump circuit, and like the smaller sibling, it is rated to 3650 psi with a 2000 rpm rated speed. Because it is a component rather than a self-contained unit, you still have to add the motor, reservoir, and plumbing. If you need counter-clockwise rotation, this pump points the wrong way, so match rotation before ordering.
Hydraulic Power Unit 12V, Single Acting Dump Hydraulic Pump for Dump Trailer
This compact 12V unit bundles an 800W motor, remote control system, and a 1.5L tank, so it can arrive as a ready-to-wire dump trailer lift. The single-acting design lifts the bed with hydraulic pressure and lets gravity bring it down, which is straightforward for lighter trailers. The copper-wire motor and fast startup are useful when you want quick cycles. On the downside, a 1.5L tank is small, so repeated heavy use may cause the oil to heat up faster than a larger-reservoir unit. Also, hydraulic oil is not included, so you will need to supply your own.
20 Quart Double Acting Hydraulic Pump 12V DC Dump Trailer Hydraulic Power Unit
This power unit brings a 20-quart metal tank, 1.6KW motor, and double-acting power-up/power-down operation, so it can push a dump trailer bed down as well as lift it. The SAE #6 ports and 3200 psi maximum overflow setting fit many dump trailer setups, and the included 15-foot remote pendant gives you control from a distance. The trade-off is that this is the largest unit here, so it takes more space and may be more than a smaller trailer needs. It also includes two extra SAE #6 fittings for replacement.
Final Recommendation
For a bolt-on dump trailer upgrade with remote control on a tight budget, the Hydraulic Power Unit 12V Single Acting is the clear choice at $143.99. If you need bidirectional control and a large reservoir, the 20 Quart Double Acting is the better match. For custom hydraulic circuits, pick the GP-F20-08-P1-A for counter-clockwise small displacement, or the GP-F20-12-P-C for clockwise and higher flow.
