Menu
Provide up-to-date technical documentation so that we can facilitate the fault identification process and improve the activity & efficiency of our technical professionals. No matter what problem we face, we are always ready to find a solution at the best technological opportunit
Get the Best Hydraulic
POZOOM supplies high-quality hydraulic spare parts including charge pumps (pilot pumps), seal kits, and piston pump components compatible with Bosch Rexroth, Kawasaki, Eaton, and other major brands. With over 7,000 parts in stock, we help equipment operators minimize downtime and maintain peak hydraulic system performance.
We carry charge pumps and components for both closed-circuit and open-circuit Rexroth axial piston pump systems.
Replacement pilot pumps for Rexroth A4VG closed-loop piston pump systems
| Available Models | A4VG40, A4VTG90, A4VG125 |
| Pump Type | Internal Gear Charge Pump |
| System Pressure | Up to 350 bar (5,075 PSI) |
| Application | Excavators, Concrete Mixers, Pavers |
| Price Range | $65 – $125 |
Replacement pilot pumps for Rexroth A10VG open-circuit axial piston pump systems
| Available Models | A10VG28 |
| Pump Type | Internal Gear Charge Pump |
| System Pressure | Up to 350 bar (5,075 PSI) |
| Application | Loaders, Drilling Rigs, Road Machinery |
| Price Range | $99 |
Know what a charge pump does and why timely replacement is critical to your hydraulic system's health.
A charge pump (also called a pilot pump or boost pump) is an internal gear pump mounted directly on the main piston pump's drive shaft. As one of the essential hydraulic parts in any piston pump system, it serves critical functions within the hydraulic circuit:
A failing charge pump can cascade into major system damage. Equipment operators should watch for these warning signs:
Replacing a charge pump promptly can prevent costly damage to the main piston pump, hydraulic valves, and downstream actuators. POZOOM charge pumps are built to OEM-interchangeable specifications and tested at full operating pressure before shipping.
Every POZOOM hydraulic spare part undergoes a rigorous quality assurance process. Raw materials are inspected for hardness and dimensional tolerance before machining. Finished charge pumps are assembled in ISO-standard clean rooms and subjected to a full-pressure bench test that verifies flow rate, charge pressure, and leakage against original Rexroth specifications. Understanding what makes a hydraulic brand reliable starts with this kind of testing discipline. This process ensures each unit is 100% interchangeable with the original equipment part — so you can install it with confidence and get your machine back in operation quickly.
Compare key parameters across our hydraulic charge pump range to find the right replacement for your equipment.
| Model | Compatible Pump Series | Circuit Type | Displacement | Max Pressure | Price | Action |
|---|---|---|---|---|---|---|
| A4VG / A4VTG Series — Closed Circuit Charge Pumps | ||||||
| A4VG40 | Rexroth A4VG28 / A4VG40 | Closed Circuit | 28–40 cc/rev | 350 bar (5,075 PSI) | $70.00 | View → |
| A4VTG90 | Rexroth A4VTG71 / A4VTG90 | Closed Circuit | 71–90 cc/rev | 350 bar (5,075 PSI) | $65.00 | View → |
| A4VG125 | Rexroth A4VG90 / A4VG125 | Closed Circuit | 90–125 cc/rev | 350 bar (5,075 PSI) | $125.00 | View → |
| A10VG Series — Open Circuit Charge Pumps | ||||||
| A10VG28 | Rexroth A10VG18 / A10VG28 / A10VG45 | Open Circuit | 18–45 cc/rev | 350 bar (5,075 PSI) | $99.00 | View → |
All manufacturer names (Rexroth®, Bosch®) are used for reference only. POZOOM is not an authorized dealer of Bosch Rexroth AG.
Our hydraulic spare parts serve equipment across diverse heavy-duty sectors worldwide.
Excavators, wheel loaders, backhoe loaders, concrete pump trucks, and road pavers requiring reliable charge pump operation under heavy cyclic loads.
Tractors, combine harvesters, and self-propelled sprayers that depend on closed-circuit hydrostatic drives for ground travel and implement control.
Drilling rigs, underground loaders, tunnel boring machines, and mineral crushers operating in extreme conditions where spare parts reliability is critical.
Deck cranes, anchor winches, and offshore platform hydraulic systems exposed to salt-water environments demanding corrosion-resistant components.
Injection molding machines, hydraulic presses, and metal-forming equipment where consistent charge pressure ensures production cycle precision.
Need spare parts for specialized equipment? Contact our engineering team for cross-reference assistance and custom sourcing.
Learn more about hydraulic system maintenance and component selection from our technical library:
“A leader in hydraulic technology, A convenient choice around you”
