Rexroth A10VO28DFR/31R-PSC62N00 Piston Pump

The Bosch Rexroth A10VO28DFR/31R-PSC62N00 is a highly specific, open-circuit variable displacement axial piston pump engineered for demanding mobile hydraulic applications. Delivering a precise maximum displacement of 28 cubic centimeters per revolution, this exact configuration is equipped with advanced DFR (Pressure and Flow) load-sensing control. Built with a rugged SAE splined shaft and standard NBR seals, it provides highly efficient, energy-saving hydraulic power directly driven by commercial vehicle or off-highway equipment engines.

When a machine requires the exact A10VO28DFR/31R-PSC62N00 replacement, standardizing on this specific part number ensures seamless installation and identical performance characteristics.

What Makes This Specific Configuration Unique:

Load Sensing Precision (DFR): The integrated DFR control valve ensures the pump only supplies the exact flow and pressure demanded by the machine’s actuators. This eliminates parasitic engine loads, significantly reducing diesel fuel consumption and preventing the hydraulic fluid from overheating during operation.
Right-Hand Rotation (31R): This unit is strictly configured for clockwise rotation (viewed from the shaft end), perfectly matching standard right-hand PTOs and engine drive outputs.
Heavy-Duty Splined Shaft (S): The “S” designation means this pump features a robust splined shaft designed to handle high-torque power transmission without the shearing risks associated with standard keyed shafts.
Reliable NBR Sealing (P): Factory-installed with premium Nitrile (NBR) seals, making it perfectly compatible with standard mineral-based hydraulic oils (HL, HLP) commonly used in construction and agricultural environments.

Exact Technical Specifications

Parameter	Specification for A10VO28DFR/31R-PSC62N00
Pump Design	Variable Axial Piston (Swashplate)
Circuit Type	Open Circuit
Exact Displacement	28 cc/rev
Nominal Operating Pressure	280 bar (4000 psi)
Maximum Peak Pressure	350 bar (5100 psi)
Rotation Direction	Right-Hand (Clockwise)
Shaft Type	SAE Splined Shaft
Mounting Flange	SAE 2-Hole

Frequently Asked Questions (FAQs)

Q1: What does the “DFR” signify on the A10VO28DFR/31R-PSC62N00? The DFR designation means the pump is equipped with a Pressure and Flow Control valve, commonly known as a Load Sensing valve. This allows the pump to dynamically adjust its output to match the exact requirements of your hydraulic cylinders or motors, saving energy.

Q2: Is the A10VO28DFR/31R-PSC62N00 suitable for counter-clockwise PTO drives? No. The “R” in the 31R section of the model code strictly dictates that this pump operates in a Right-hand (clockwise) direction. Running it in reverse will cause immediate internal damage and failure to build pressure.

Q3: Can I attach a secondary gear pump to the back of this specific model? No. The “N00” suffix at the end of the model code indicates that this is a standard configuration without a rear through-drive. It cannot accept additional pumps mounted to its rear cover.

Q4: What type of hydraulic fluid should be used with the “P” seal configuration? The “P” code signifies NBR (Nitrile) seals. These seals are highly reliable and designed specifically for use with standard mineral oil-based hydraulic fluids, such as HLP and HL.

Q5: What kind of drive shaft does the PSC62N00 configuration use? The “S” in the code represents a splined shaft. This is designed to mate perfectly with a matching internally splined coupling, providing a secure, high-torque connection for mobile equipment drives.