Bosch Racine/Koshin PSM-PSAO-07ER-J35E1 - Silent Vane Hydraulic Pump

Product Overview

The Bosch Racine / Koshin PSM-PSAO-07ER-J35E1 is a high-performance Silent Vane Pump designed for industrial hydraulic systems requiring ultra-quiet operation and high efficiency. Developed through the technical expertise of Bosch Racine and Koshin, this pump is engineered to minimise pressure pulsations and mechanical noise while maintaining consistent flow rates.

Technical Specifications

The Bosch Racine/Koshin PSM-PSAO-07ER-J35E1 Silent Vane Pump is engineered for demanding hydraulic applications where reliability, smooth operation, and consistent pressure performance are critical. As part of the proven Racine Fluid Power heritage, this Silent Vane (SV) technology continues to deliver dependable performance in industrial and mobile hydraulic systems worldwide.

Supported under the Racine legacy program by Bosch Rexroth, the PSM-PSAO-07ER-J35E1 model is suitable for both new installations and replacement applications. Its advanced vane design ensures reduced noise levels, stable flow characteristics, and long service life — even in continuous-duty environments.

Designed for precision hydraulic control and efficient energy transmission, this Silent Vane pump is a reliable solution for hydraulic power units, machinery, and equipment operating under high-load conditions.

Applications (Where it is used)

In industrial catalogues, this section is usually titled "Typical Applications" or "Industry Use Cases." -Machine Tool Hydraulics: Extensively used in CNC milling, lathes, and grinding machines for clamping, tool changing, and lubrication systems.

-Plastic & Die Casting: Ideal for injection moulding machines where precise, low-pulse pressure is required for high-quality moulding.

-Precision Industrial Pressing: Used in hydraulic presses that require smooth movement and low noise levels for operator comfort.

-Lubrication & Cooling Systems: Perfect for continuous-duty cooling loops in large-scale industrial gearboxes or power units.

-Automated Production Lines: Found in assembly robots and automated material handling systems that rely on consistent hydraulic power.

Interchangeability & Compatibility. 

- Bosch Racine & Koshin Collaboration: This pump is the result of a technical partnership. It is a direct replacement for various Bosch Racine PSM series and Koshin PSAO equivalent models.

-Mounting Compatibility: Designed to meet standard industrial mounting patterns (often SAE or ISO standards), allowing it to be swapped into existing hydraulic power units (HPUs) with minimal piping adjustments.

-Cross-Reference Note: If you are replacing a Racine Silent Vane pump of a similar displacement, the PSM-PSAO-07ER-J35E1 offers improved noise reduction and volumetric efficiency.

-Rotational Direction: Ensure the system matches the "R" (Right-hand/Clockwise) rotation specified in this model code (07ER).

Technical Cross-Reference Table

Note 1:  The item number “B” PSM is used for pumps supplied by BOSCH and is interchangeable with the PSM series. For your reference, we have attached the catalog for the PSM series and a drawing of one PSM pump model, which has some differences in dimensions of IN/OUT port etc.

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Note 2: Production and Delivery time is 3-4 months becouse the pump is manufactured on a made-to-order basis.The repair parts kit was discontinued in 2022.