Rexroth A4VTG090 family essentials
The A4VTG090 is a swashplate‑type, variable‑displacement axial‑piston pump for closed‑circuit hydrostatic drives. It features nominal pressure 400 bar and maximum pressure 450 bar, with a geometric displacement of 90 cm³/rev. Typical maximum speeds are ≈3050 rpm at Vg max and ≈500 rpm minimum; at n nom and Vg max, the theoretical flow is about 275 L/min. Common applications include mobile concrete mixers and other heavy‑duty mobile machinery. Key built‑in functions include two high‑pressure relief valves (also serving as boost valves) and an integrated boost pump for feed and control pressure. The series is designated Series 33 for sizes NG71/90.
Model code decoding for the listed variants
Control device (first 3 characters after size):
EP3 = Electro‑proportional control, 12 V DC coil, spring return with emergency actuation.
EP4 = Electro‑proportional control, 24 V DC coil, spring return with emergency actuation.
HW1 = Hydraulic (mechanical servo) control; many catalog entries use the short form HW for this family.
Suffixes and options:
P0 = Standard version without additional electrical interface beyond the control; exact meaning is defined by the full type code and data sheet.
PT = Indicates a pump with control interface/adapter; in many product listings this is paired with an AZ‑P‑F‑12 (12‑pin interface/plug kit). If the interface is not required, P0 is typically used.
The remainder of the type code defines Series (33), flange/shaft/through‑drive, ports/design, and variant/suffix (e.g., /33MRNC4C92F0000AS‑0). Always order using the complete type code and verify against the nameplate.
Quick comparison of the listed codes
Code | Control family | Coil voltage | Interface/notes | Example full P/N pattern |
|---|---|---|---|---|
A4VTG090EP3P0 | EP (electro‑proportional) | 12 V DC | Standard version (no extra I/O listed) | A4VTG090EP3P0/33MRNC4C92F0000AS‑0 |
A4VTG090EP3PT | EP (electro‑proportional) | 12 V DC | Pump with control interface; commonly supplied with AZ‑P‑F‑12 | A4VTG090EP3PT/33+AZ‑P‑F‑12 |
A4VTG090EP4P0 | EP (electro‑proportional) | 24 V DC | Standard version | A4VTG090EP4P0/33MRNC4V92F0000AS‑0 |
A4VTG090EP4PT | EP (electro‑proportional) | 24 V DC | Pump with control interface; commonly supplied with AZ‑P‑F‑12 | (Same P/N structure as EP3PT with EP4 control) |
A4VTG090HW100 | HW (hydraulic servo) | — | Mechanical/hydraulic control; many variants use suffix 100 in the type code | A4VTG090HW100/33MRNC4C92F0000AS‑0 |
A4VTG090HW10T | HW (hydraulic servo) | — | Variant of HW100 family; exact meaning defined by full suffix | (HW10T variants are listed in distributor catalogs) |
All listed codes are Series 33, size NG90 closed‑circuit pumps; the EP variants differ by coil voltage (12 V vs 24 V), and P0 vs PT denotes whether a control interface is included. HW variants are hydraulic control with multiple suffix options for mounting/through‑drive and design.
How to choose among EP3, EP4, and HW
If the machine uses 12 V DC control electronics, select EP3; for 24 V DC, select EP4. Choose HW when a hydraulic/mechanical servo control loop is preferred.
If a separate electrical interface/plug kit is needed for your harness/ECU, use the PT suffix (commonly with AZ‑P‑F‑12); if the control is integrated or the interface is not required, use P0.
Match the complete type code (including Series, flange/shaft, ports, and suffix) to your parts list/nameplate to ensure control compatibility and correct configuration.
Typical applications and ordering notes
These pumps are widely used in mobile concrete mixers and other construction/off‑highway machinery requiring high power density and closed‑circuit control.
Availability: numerous EP3/EP4/PT and HW100 variants are stocked by Rexroth distributors; examples include A4VTG090EP3P0/33MRNC4C92F0000AS‑0, A4VTG090EP3PT/33+AZ‑P‑F‑12, and A4VTG090HW100/33MRNC4C92F0000AS‑0. Always confirm the full type code, control voltage, and interface kit before ordering.
