When a hydraulics pneumatics system starts acting up, you often face a fork in the road: replace the pump that moves fluid or the cylinder that converts it into motion. Both parts live in the same hydraulic circuit but solve completely different problems. The Dynamic Fluid Components GP-F20-12-P-C is a new gear pump rated for continuous flow, while the AMRAP 2.5x6 is a new double-acting tie-rod cylinder built for pushing or pulling. Picking the wrong one means the repair still isn't done.
Quick Verdict
If your system is struggling to build pressure or flow, the gear pump is the part you need. If a cylinder is leaking, drifting, or failing to extend under load, the tie-rod cylinder is the right replacement. The pump costs USD 191.62 and the cylinder costs USD 126.34, so the cylinder is the lighter hit to your wallet, but the right choice depends on the failed component.
Comparison at a Glance
| Feature | Dynamic Fluid Components GP-F20-12-P-C | 2.5x6 Hydraulic Cylinder |
|---|---|---|
| Price | USD 191.62 | USD 126.34 |
| Type | Hydraulic gear pump | Double-acting tie-rod cylinder |
| Key Specs | Max pressure 3650 psi, 0.73 displacement, rated speed 2000 rpm | 2.5" bore, 6" stroke, max operating pressure 2500 PSI |
| Country of Origin | United States | India |
| Condition | New | New |
Where the Pump Wins
The Dynamic Fluid Components GP-F20-12-P-C brings a lot to a hydraulic power unit. It's a gear pump with a 2-bolt SAE A mounting flange, a 5/8" straight keyed shaft, and SAE-12 inlet / SAE-10 outlet ports. It's rated for 3650 psi max pressure and can spin up to 3600 rpm, though the rated speed is 2000 rpm. If you're rebuilding a pump that lost its ability to move oil, this new unit gives you a direct replacement with a clear part number and US origin.
Where the Cylinder Wins
The AMRAP 2.5x6 hydraulic cylinder is a double-acting tie-rod design that extends and retracts under pressure. With a 2.5" bore, 6" stroke, and a 1.125" rod, it's sized for medium-duty linear motion jobs. The retracted length is 16 1/4" and extended is 22 1/4", making it easy to plan around. The 3/8" NPT ports and 1" pin holes are common in tooling and equipment builds. If your cylinder is leaking or not holding load, this new unit is a straightforward swap.
Product Notes
Dynamic Fluid Components GP-F20-12-P-C Hydraulic Gear Pump
This new gear pump is the heart of a hydraulic circuit that needs reliable oil movement. Key specs include a displacement of 0.73 cubic inches per revolution, clockwise rotation, and a 4.25" side-ported / 4.70" rear-ported layout. The 5/8" straight keyed shaft and SAE A 2-bolt flange make it compatible with many common hydraulic motors and mounts. Max pressure of 3650 psi gives it headroom for demanding applications. The pump weighs 11 lbs and is built in the United States by Dynamic Fluid Components. One limitation: it only pumps fluid, so it won't fix a cylinder that has mechanical damage or worn seals. If your actuator is the problem, this gear pump won't help.
2.5x6 Hydraulic Cylinder 2.5" Bore 6" Stroke Double Acting Tie-Rod Cylinder
This AMRAP Co cylinder is a double-acting tie-rod unit with a 2.5" bore and a 6" stroke, rated for 2500 PSI. The black finish and 1.125" rod give it a solid feel for pushing, lifting, or clamping tasks. Retracted length of 16 1/4" and extended length of 22 1/4" make it simple to fit into an existing assembly. The 3/8" NPT ports are standard, and the 1" pin holes work with common clevis mounts. Column load is listed at 12,270 lbs. The main limitation is that it's a cylinder, not a pump, so it won't fix low pressure or flow issues. Also, the 6" stroke is fixed; if you need a longer or shorter travel distance, this exact model won't cover it.
Final Choice by Use Case
If you're chasing low pressure, slow actuator speed, or no flow at all, go with the Dynamic Fluid Components GP-F20-12-P-C hydraulic gear pump. Its 3650 psi max pressure and 2000 rpm rated speed give you the flow a tired pump may have lost. If you're dealing with a cylinder that won't move, leaks externally, or drifts under load, the AMRAP 2.5x6 tie-rod cylinder is the more focused fix. At USD 126.34, it's also the lower-priced option of the two, but the pump at USD 191.62 is worth the extra money if the system's circulation is the real problem. Match the part to the failed function and you'll get the system back online.
