MPV046CBBBSBBAAGABHHDBAHHCNN Danfoss Series 40 Variable Piston Pump

Product Overview

The MPV046 series axial piston variable displacement pump is a flagship product within the Danfoss (formerly Sauer-Danfoss) Series 40 platform, specifically engineered for closed-circuit hydrostatic transmissions in medium-to-high power mobile applications. Designed to fully comply with Danfoss MPV046 series mounting and interface standards, this pump offers 100% direct interchangeability with original Danfoss units—enabling plug-and-play replacement without any管路 modifications or adapter plates, significantly minimizing downtime and retrofit costs.

The MPV046 features a swashplate-type axial piston variable displacement design. By steplessly adjusting the swashplate angle, the pump delivers continuously variable output flow with smooth transition from full forward flow through neutral to full reverse flow. Designed for closed-circuit applications, the pump is equipped with an integrated charge pump to provide system replenishing and cooling flow. Every unit undergoes 100% factory testing under simulated real-world working conditions, validating pressure, flow, volumetric efficiency, and control characteristics before shipment—ensuring reliable operation from the very first start.

Model Code Interpretation (using MPV046CBBBSBBAAGABHHDBAHHCNN as an example, in bulleted list format):

• MPV – Series code: Variable displacement axial piston pump (closed circuit)

• 046 – Displacement size: 46 cm³/rev (actual 45.9 cm³/rev)

• C – Product type: Swashplate

• B – Seal group: Shaft seal with electrical/hydraulic displacement control

• B – Pressure balanced swashplate

• H – Input shaft/Auxiliary drive: 15T 16/32 spline / 9T 16/32 spline, with A auxiliary

• T – Rotation & valve plate: Counterclockwise rotation

• B – Charge pump displacement: 13.99 cm³/rev (0.85 in³/rev)

• B – Charge pressure relief valve setting: 19.5 bar (280 psi)

• AA – Filtration: Suction filtration with charge pump

• A – Displacement limiters: Full displacement

• A – Bypass valve: No orifice

• CFA – System pressure protection: 250 bar / check valve

• CG – Control: Electrical displacement control, dual coil, oil filled, MS 4‑pin connector, 23–132 mA

• A – Handle position: Not applicable

• JJ – Control orifice diameter: Electrical/hydraulic displacement control

• A – Auxiliary mounting flange: SAE A flange

• NNN – Special hardware features: None, black paint, Danfoss tag

Technical Specifications (Bulleted List)

MPV046CBBBSBBAAGABHHDBAHHCNN

• Model: MPV046CBBBSBBAAGABHHDBAHHCNN

• Type: Variable displacement axial piston pump (closed circuit)

• Displacement: 45.9 cm³/rev (2.80 in³/rev)

• Maximum Working Pressure: 345 bar (5,000 psi)

• Charge Pump Displacement: 13.99 cm³/rev (0.85 in³/rev)

• Charge Pressure Setting: 19.5 bar (280 psi)

• Rated Input Speed: 4000 r/min

• Rotation Direction: Counterclockwise (CCW)

• Control Type: Electrical displacement control, dual coil, oil filled, MS 4‑pin connector, 23–132 mA

• Mounting Flange: SAE B 2‑bolt flange

• Auxiliary Mounting Flange: SAE A

• Input Shaft: 15‑tooth 16/32 spline

• Filtration: Suction filtration

• Weight: Approx. 20–25 kg (configuration dependent)

• Medium: Hydraulic oil

• Operating Temperature Range: 30–90℃

Key Technical Advantages

1. 100% Direct Interchangeability – Zero Modification Required
The MPV046 series is engineered to exact Danfoss Series 40 mounting and interface specifications, with identical dimensions, port locations, and shaft end configurations. End users can replace original units directly without any管路 modifications or adapter plates—transforming unplanned downtime into scheduled, rapid maintenance while significantly reducing spare parts procurement costs and equipment downtime losses.

2. Swashplate Variable Design with Stepless Flow Regulation
The proven swashplate axial piston variable displacement design enables continuous flow adjustment through stepless swashplate angle variation. The transition from full forward flow through neutral to full reverse flow is smooth and shock‑free, providing flexible speed control and smooth direction reversal for working mechanisms.

3. Integrated Charge Pump – Self‑Sufficient System
An integrated charge pump with 13.99 cm³/rev (0.85 in³/rev) displacement is standard, providing system replenishing and cooling flow for closed‑circuit applications. Charge pressure is precisely maintained by an internal relief valve at 19.5 bar (280 psi), ensuring optimal system operating conditions at all times.

4. Flexible Control and Interface Options
A wide range of control options is available—mechanical proportional, hydraulic proportional, and electrical proportional control. This model is equipped with electrical displacement control (dual coil, oil filled, MS 4‑pin connector) for rapid response and precise control. An SAE A auxiliary mounting flange is also provided for connecting additional auxiliary hydraulic pumps to expand system functionality.

5. Compact Design with High Power Density
The Series 40 M46 platform delivers 45.9 cm³ displacement and 345 bar high‑pressure capability within a compact SAE B mounting footprint. The high power density design makes it an ideal choice for mobile equipment with limited installation space.

6. 100% Factory Testing Under Simulated Working Conditions
Every MPV046 series unit undergoes rigorous factory testing under simulated real‑world conditions, validating pressure, flow, volumetric efficiency, control response characteristics, and thermal performance across the full operating range. Test media match actual operating conditions, ensuring each unit is ready for immediate installation and reliable operation upon delivery—eliminating the risk of “dead on arrival” components.

Application Areas

The MPV046 series variable displacement piston pumps are widely deployed across the following industries and equipment types:

• Road construction equipment: Bomag BW211/BW213/BW219/BW226 tandem rollers, Hamm 3410/3412/3516 rollers, Ammann ASC110/ASC130 rollers, Dynapac CA250/CA302/CA362 rollers, asphalt pavers

• Compact loaders: Caterpillar 246/262/272 skid steer loaders, Bobcat S160/S185/S205 skid steer loaders, Case SR130/SR200/SR250 skid steer loaders

• Municipal & specialty vehicles: Trenchers, compact track loaders, sweepers, and waste‑collection vehicles

• Turf & grounds maintenance: Mowers and fairway maintenance equipment

Expert Maintenance Tips

1. Hydraulic Fluid Cleanliness Management
The MPV046 utilizes swashplate axial piston designs with minimal clearances between pistons and cylinder bores, making them highly sensitive to fluid contamination. It is recommended to install suction and return line filters with ≤10μm filtration rating, maintaining fluid cleanliness to ISO 4406 18/13 or better. Never use degraded or substandard hydraulic fluids.

2. Charge Pressure Monitoring
Charge pressure is factory‑set at 19.5 bar (280 psi) . Regularly verify that charge pressure remains within the specified range during operation. Low charge pressure will cause system cavitation and inadequate lubrication, while excessive pressure increases power loss and heat generation.

3. Air Bleeding and Pre‑filling Before Start‑up
Always bleed air from the pump housing via the highest vent port before initial start‑up or after extended shutdown periods to prevent cavitation damage. Ensure the pump housing is completely filled with hydraulic fluid prior to starting—this can be achieved by pre‑filling through the case drain port.

4. Coupling Alignment Requirements
Maintain shaft alignment within 0.05 mm concentricity and 0.5° angular deviation between the drive shaft and the prime mover output shaft. Excessive misalignment will lead to premature bearing wear and shaft seal leakage. The use of flexible couplings is recommended to compensate for minor installation deviations.

5. Electrical Proportional Control Wiring Verification
This model is equipped with electrical displacement control (dual coil, oil filled, MS 4‑pin connector, 23–132 mA). Before wiring, verify that the control system output current range matches the coil specifications to avoid coil burnout from overcurrent or sluggish control response from insufficient current.

6. Periodic Inspection and Maintenance
Inspect shaft seals for leakage and listen for abnormal operating noise every 1,000 operating hours or every 6 months (whichever comes first). If reduced volumetric efficiency or insufficient output flow is observed, timely overhaul of the piston assembly and valve plate is recommended.