Rexroth A10VO28ED72/52R‑VSC12N00P‑S2070 Overview
This is a Bosch Rexroth A10VO Series 52 variable‑displacement axial‑piston pump with a geometric displacement of 28 cm³/rev. It is intended for open‑circuit applications in mobile and industrial machinery, featuring high power density, low noise, short control response, and through‑drive capability for mounting an additional pump of the same nominal size. Typical ratings for this size include a nominal pressure of 250 bar and a maximum pressure of 315 bar; at n nom = 3000 rpm it delivers about 84 L/min. The “ED72” control suffix denotes a specific electrohydraulic control variant; always match the complete type code to your machine’s parts list and the pump nameplate.
Key specifications
Parameter | Value |
|---|---|
Displacement (Vg max) | 28 cm³/rev |
Nominal pressure (p nom) | 250 bar |
Maximum pressure (p max) | 315 bar |
Nominal speed (n nom) | 3000 rpm |
Maximum speed (Vg max) | 3000 rpm |
Flow at n nom, Vg max (qV nom) | 84 L/min |
Flow at n = 1500 rpm, Vg max | 42 L/min |
Power at qV nom, p nom | 35 kW |
Torque at Vg max, p nom | 111 N·m |
Approx. weight | 14 kg |
Circuit | Open circuit |
Through‑drive | Yes (same nominal size) |
Typical control family | ED72 = electrohydraulic control |
Notes: Ratings are per Bosch Rexroth A10VO data for size 28; the exact control behavior and response are defined by the control suffix (e.g., ED72).
Model code breakdown and ordering notes
Example breakdown for a similar A10VO28 code: A10VO 28 DR / 52R‑VSC12N00P‑Sxxxx
A10VO: Series and type (swashplate, variable displacement).
28: Size (28 cm³/rev).
DR: Control device family (e.g., DR = pressure‑controlled; your unit uses ED72).
/52R: Series suffix and mounting/through‑drive orientation.
VSC12N00P: Port/flange/design variant details.
‑S2070: Further variant/serial suffix.
Your exact string (…‑ED72/52R‑VSC12N00P‑S2070) follows the same coding logic. Always order using the complete type code and verify against the pump nameplate and machine SIS/parts list to ensure control compatibility and correct configuration.
Performance check and application guidance
The catalog flow at 3000 rpm and Vg max is 84 L/min; at 1500 rpm it is 42 L/min. Your stated 84 L/min therefore corresponds to operation near n nom with the pump at or near Vg max.
The stated 250 bar is the pump’s nominal pressure rating; the A10VO28 is also specified with a maximum pressure of 315 bar depending on the control and system limits—use the lower of the pump rating, control setting, or system relief as the effective limit.
This pump is designed for open‑circuit systems (not closed‑circuit hydrostatic drives). Typical applications include mobile and industrial machines requiring load‑sensing, pressure‑compensated, or electrohydraulic control strategies.
Commissioning and maintenance essentials
Pre‑fill and bleed the pump; ensure the suction side is primed and the oil meets OEM cleanliness and viscosity specs.
Verify through‑drive alignment and coupling end play; check case drain flow and temperature during first runs.
Set pressure relief and any installed pressure cut‑off per machine specs; respect the control’s adjustment range and response.
Inspect and, if needed, replace the suction strainer/filter; confirm all electrical connections for the ED72 control variant.
After start‑up, recheck noise, vibration, and leakage, and confirm the control response matches expected behavior at low and high pressure.
