Bosch Rexroth A4VG variable hydraulic pump for Prinoth AHWI equipment 0016109 1500168 1500186 20.80.061 20.80.087 20.80.088 20.80.124

The A4VG is a swashplate-type axial piston pump. Instead of a fixed displacement, the swashplate angle can be varied on the fly, which changes the volume of oil the pump delivers per revolution. On an AHWI attachment, this variability allows the operator to match hydraulic flow to rotor demand — high flow for aggressive cutting, and reduced flow when idling or feathering through lighter material.

AHWI drive systems typically run the A4VG in a closed-loop circuit paired with an A6VM or similar fixed/variable motor. Oil recirculates between pump and motor rather than returning to tank on every cycle, which keeps response times tight and reduces heat generation compared to an open-circuit setup — important when the rotor is engaging and disengaging repeatedly against variable vegetation density.

Every A4VG unit ships with an integrated charge pump that maintains circuit pressure and compensates for internal leakage, plus a control package (hydraulic, electro-hydraulic, or electronic, depending on spec) that manages swashplate angle. On Prinoth-configured units, this is typically integrated with the carrier's own hydraulic control logic, allowing the rotor speed to track throttle and load sensing, rather than maintaining a single, flat output.

Choosing and Sourcing an A4VG Pump for Your AHWI Unit

Not every A4VG is interchangeable across every AHWI or Prinoth model. Displacement size, control type (hydraulic, electro-hydraulic, or DA/electronic proportional), shaft configuration, and porting all vary by application. Before ordering a replacement or remanufactured unit, confirm:

The exact model and displacement code stamped on the original pump's nameplate

Whether your unit uses hydraulic, electric, or electro-hydraulic displacement control

Rotation direction and shaft/spline configuration

Whether Prinoth's specific carrier integration requires OEM-matched calibration on the control package

Working through an authorized Bosch Rexroth or Prinoth parts channel, rather than a generic aftermarket listing, is the safest way to avoid a pump that's physically similar but electronically or hydraulically mismatched to your control system.

For more brand and equipment models, please visit https://www.baolilaihydraulic.com/brand/

Q1: Is the A4VG pump specific to Prinoth, or is it used elsewhere?

A1: The A4VG is a general-purpose Bosch Rexroth product line used across excavators, forestry equipment, agricultural machinery, and industrial mobile hydraulics well beyond Prinoth. Prinoth specifies particular displacement sizes and control configurations for its AHWI carriers, but the pump itself isn't proprietary to the brand.

Q2: What's the difference between the pump and the motor in this system?

A2: The A4VG pump converts mechanical input (from the carrier's engine) into hydraulic flow. That flow drives a separate hydraulic motor (often an A6VM in Prinoth setups) mechanically coupled to the mulching rotor. The pump and motor form the two halves of the closed hydrostatic loop — diagnosing a problem means figuring out which half is actually at fault.

Q3:What is the price and delivery time of the A4VG hydraulic pump for the Prinoth AHWI equipment?

A3: The specific price and delivery time will depend on the equipment model or specific product model you provide.

Q4:How to purchase an A4VG hydraulic pump for Prinoth AHWI equipment?

A4:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.