Rexroth A17VO A18VO variable hydraulic pumps for the Palfinger Lifting equipment EP1307 EP347L EP347R EP650HD EP651HD EP652HD
- Product Details
- Product Model
- FAQ
The A17VO and A18VO pumps both belong to the Bosch Rexroth series of variable-displacement axial piston pumps for open-circuit operation. In an open-circuit system, the pump draws fluid from the reservoir and returns it to the reservoir after the work is performed; this is the standard configuration for cranes, dump trucks, and other mobile machinery.
The key traits they share:
- Axial piston, bent-axis design. This construction is known for robustness and good efficiency at high pressure.
- Variable displacement. The pump changes its output flow on demand instead of pushing a fixed volume and dumping the excess as heat.
- Mobile-duty build. They are designed for machinery that runs in dirt, vibration, and wide temperature swings.
Why Variable Displacement Matters on a Palfinger Crane
A loader crane doesn't work at a constant pace. One moment it lifts a heavy load slowly, the next it slews with no load, and often it holds still while the operator repositions.
A fixed pump would push full flow through the system all the time and bleed off the surplus as heat. A variable pump avoids that. It delivers only what the functions need, which brings several benefits:
- Lower fuel consumption from the truck's power take-off (PTO).
- Cooler oil, which extends the life of seals, hoses, and the oil itself.
- Smoother, more controllable movements, which matters when placing a load precisely.
- Less wear on the PTO, gearbox, and the pump itself.
Load-Sensing and Pressure Control
Modern Palfinger systems typically rely on demand-based (load-sensing) hydraulics, where the pump senses the highest load pressure and adjusts flow to match it. The pump's controller does this job. Common controller families on Rexroth variable pumps include:
- Pressure control (cut-off): limits maximum system pressure and protects the crane's structure and valves.
- Load-sensing control: matches flow to demand, which suits proportional crane valve blocks.
- Power limiting: keeps the pump from asking more than the PTO or engine can deliver.
Which of these your pump has is stamped into its type code, so read that code carefully before ordering a replacement.
Choosing a Replacement or Upgrade Pump
Before you buy, work through this checklist:
Match the Fundamentals
- Displacement (cc/rev): it dictates flow at a given PTO speed.
- Rotation direction: confirm against the PTO output.
- Mounting flange and shaft: they must physically fit.
- Control type: it must suit the crane's valve block.
Consider the Operating Conditions
- Maximum working pressure of the crane circuit
- Ambient temperature range and oil viscosity
- Duty cycle: occasional lifting or near-continuous grab work
Installation Best Practices
Most early pump failures are installation failures, not manufacturing ones.
1. Fill the pump casing with clean hydraulic oil before starting. Dry start-up is the fastest way to ruin a piston pump.
2. Check the suction line. It should be short, large in bore, and free of air leaks. Cavitation ruins pumps.
3. Connect the case drain correctly and route it to the tank below oil level.
4. Flush the system if the previous pump failed. Metal debris will otherwise kill the new one.
5. Replace filters and check the tank for contamination.
6. Run it in gradually, at low pressure first, then work up to full load while watching temperature and noise.
For more brands and equipment models, please visit https://www.baolilaihydraulic.com/brand/
| Application equipment brands | Application equipment No. |
| Palfinger | EP1307 |
| Palfinger | EP347L |
| Palfinger | EP347R |
| Palfinger | EP650HD |
| Palfinger | EP651HD |
| Palfinger | EP652 |
| Palfinger | EP652HD |
Q1: Is the Rexroth A17VO the same as the A18VO?
A1: No. They are related in concept, but they are different series with their own type codes, dimensions, and options. Always match the full code.
Q2: Where is the type code located?
A2: On the nameplate attached to the pump housing. If it's unreadable, use the crane's documentation or the serial number to trace the original specification.
Q3: What is the price and delivery time of the A17VO/A18VO hydraulic pump for the Palfinger Lifting equipment?
A3: The specific price and delivery time will depend on the equipment model or specific product model you provide.
Q4: How do I purchase an A17VO/A18VO hydraulic pump for the Palfinger Lifting equipment?
A4: Visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.
