MPV046CBBBSBSAAAABJJBBAYCANNN Danfoss MPV046 Pump 46cc 345bar

Product Overview

The MPV046CBBBSBSAAAABJJBBAYCANNN (Danfoss Material Number 83008997) is a Danfoss (formerly Sauer-Danfoss) Series 40 MPV Series M46 closed-circuit swashplate-type axial piston variable displacement pump with a nominal displacement of 45.9 cm³/rev (2.80 in³/rev), continuous operating pressure of 210 bar (3000 psi), peak pressure of 345 bar (5000 psi), rated speed of 4000 rpm, and weight of approximately 34 kg. The pump is specifically designed for hydrostatic transmissions in compact construction machinery including mini excavators, skid steer loaders, and compaction equipment, employing a parallel axial piston/slipper concept with a tiltable swashplate for stepless displacement variation.

The MPV046CBBBSBSAAAABJJBBAYCANNN features an integrated charge pump (13.99 cm³/rev displacement, charge relief valve set at 19.5 bar), built-in bypass valve, SAE-B two-bolt mounting flange, standard input shaft (15-tooth 16/32 spline + 9-tooth 16/32 spline auxiliary drive), and SAE-A auxiliary mounting pad. The pump is equipped with an Electrical Displacement Control (EDC) system, representing a mature medium-power solution in the Series 40 pump family.

The MPV Series covers four displacement ratings — MPV025 (24.6 cm³/rev), MPV035 (35.0 cm³/rev), MPV044 (43.5 cm³/rev), and MPV046 (46.0 cm³/rev) — along with corresponding MPT tandem pump configurations. All models share a common SAE-B mounting flange interface and control option system, delivering exceptional field interchangeability. The series is widely deployed in hydrostatic drives for mini excavators, skid steer loaders, road rollers, forklifts, transit mixers, and tractor hydraulic systems.

Every MPV046CBBBSBSAAAABJJBBAYCANNN undergoes 100% simulated duty-cycle testing prior to shipment — covering pressure holding, flow output, control response, and internal leakage — ensuring complete drop-in interchangeability with original Danfoss pumps without installation or plumbing modifications.

Technical Specifications

• Model: MPV046CBBBSBSAAAABJJBBAYCANNN

• Material Number (MNR): 83008997

• Brand: Danfoss (formerly Sauer-Danfoss)

• Series: Series 40 MPV / M46

• Pump Type: Closed-circuit swashplate axial piston variable displacement pump

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

• Continuous Operating Pressure: 210 bar (3000 psi)

• Peak Pressure: 345 bar (5000 psi)

• Rated Speed: 4000 rpm

• Maximum Speed: 4100 rpm

• Minimum Speed: 500 rpm

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

• Charge Relief Valve Setting: 19.5 bar (280 psi)

• Control Type: Electrical Displacement Control (EDC), dual coil, oil filled, MS 4-pin connector

• Direction of Rotation: Counter-clockwise (viewed from shaft end)

• Mounting Flange: SAE-B two-bolt flange

• Shaft Type: 15-tooth 16/32 spline + 9-tooth 16/32 spline auxiliary drive

• Auxiliary Mounting Pad: SAE-A flange

• Seals: Group B seal (for electrical/hydraulic displacement control)

• Housing Material: Cast iron

• Weight: Approx. 34 kg (75 lbs)

• System Pressure Protection: 250 bar (3625 psi) relief valve + check valve

• Filtration: Suction filtration with charge pump

• Bypass Valve: Built-in, no orifice

• Displacement Limiters: Full displacement

• Inlet Absolute Pressure Range: 0.8 bar (minimum)

• Case Pressure (Continuous): 1.7 bar (25 psi)

• Case Pressure (Maximum): 5.2 bar (75 psi)

MPV / MPT Series Same-Family Displacement Reference (nominal conditions):

• MPV025 / MPT025: 24.6 cm³/rev (1.50 in³/rev), 210 bar continuous, 345 bar peak, rated 4000 rpm, max 5000 rpm, charge pump 11.8 cm³/rev, weight approx. 30 kg

• MPV035 / MPT035: 35.0 cm³/rev (2.14 in³/rev), 210 bar continuous, 345 bar peak, rated 3600 rpm, max 4500 rpm, charge pump 11.8 cm³/rev, weight approx. 33 kg

• MPV044 / MPT044: 43.5 cm³/rev (2.65 in³/rev), 210 bar continuous, 345 bar peak, rated 3300 rpm, max 4100 rpm, charge pump 13.9 cm³/rev, weight approx. 34 kg

• MPV046 / MPT046: 46.0 cm³/rev (2.81 in³/rev), 210 bar continuous, 345 bar peak, rated 4000 rpm, max 4100 rpm, charge pump 13.9 cm³/rev, weight approx. 34 kg

Control Type Options:

• DDC (Direct Displacement Control): Control shaft directly drives swashplate, simple construction, direct response

• MDC (Manual Displacement Control): Mechanical input signal converted to hydraulic signal via four-way servo valve driving double-acting servo piston

• HDC (Hydraulic Displacement Control): Hydraulic pilot signal controls displacement

• EDC (Electrical Displacement Control): Electrical signal drives proportional solenoid for displacement control, supporting automation integration

• FNR (Three-Position Displacement Control): Forward-neutral-reverse three-position control, suitable for vehicle travel drives

Key Technical Advantages

1. Compact High Power Density Design — For Space-Constrained Construction Machinery

The MPV046CBBBSBSAAAABJJBBAYCANNN weighs only approximately 34 kg at 46 cm³/rev displacement, featuring compact, lightweight design with power density leading among comparable closed-circuit medium-power piston pumps. The Series 40 MPV pumps are specifically designed for “medium power” applications with maximum loads of 345 bar (5000 psi), with compact structural dimensions enabling easy integration into space-limited equipment such as mini excavators and skid steer loaders. The pump employs a parallel axial piston/slipper concept with a tiltable swashplate for efficient power transmission within a compact housing.

2. Closed Circuit Hydrostatic Transmission — Bidirectional Infinitely Variable Speed

The Series 40 MPV pump employs a closed circuit design in which hydraulic fluid circulates in a closed loop between pump and motor, with only leakage flow replenished by the integrated charge pump. Closed circuit transmissions provide an infinitely variable speed range from zero to maximum, with smooth switching between forward and reverse modes. By reversing the swashplate angle, the pump output flow reverses, directly changing the motor output shaft rotation direction without requiring additional directional valves, simplifying system plumbing layout. The integrated 13.99 cm³/rev charge pump serves dual charge and pilot supply functions, ensuring the main circuit remains filled with hydraulic fluid, preventing cavitation and maintaining system stiffness.

3. Electrical Displacement Control (EDC) — Precise Remote Adjustment and Automation Integration

The MPV046CBBBSBSAAAABJJBBAYCANNN is equipped with an Electrical Displacement Control (EDC) system featuring dual coil, oil-filled proportional solenoids and MS 4-pin connector, with control current range of 23–132 mA. The EDC control method precisely adjusts the swashplate angle via electrical signals for continuous proportional displacement control, adapting to construction machinery ECU electronic control strategies. Compared to hydraulic pilot control, electrical displacement control offers faster response, higher control precision, and simplified wiring — particularly suitable for compact mobile machinery requiring accurate speed control and automation integration.

4. Flexible Control Options and Modular Design

The Series 40 MPV family offers a complete range of control system options including Direct Displacement Control (DDC), Manual Displacement Control (MDC), Hydraulic Displacement Control (HDC), Electrical Displacement Control (EDC), and Three-Position Displacement Control (FNR). These control options enable the same pump body to adapt to different equipment control requirements, providing flexible selection space for system design and equipment maintenance. Modular design supports rapid field replacement of control modules, significantly reducing equipment downtime.

5. Exceptional Field Interchangeability and Series Selection

The MPV046CBBBSBSAAAABJJBBAYCANNN features SAE-B two-bolt mounting flange, splined shaft, and dual port layouts conforming to Danfoss Series 40 MPV standards, enabling drop-in interchangeability with same-series MPV025, MPV035, MPV044, and MPT tandem pumps. The MPV Series covers a wide displacement range of 24.6–46.0 cm³/rev within a shared mounting flange system, offering multiple control and charge pump displacement options for flexible selection in system design and equipment maintenance, dramatically reducing equipment downtime.

Application Areas

• Mini Excavators: Travel and swing drive hydraulic systems for compact excavators, with closed circuit enabling precise speed control

• Skid Steer Loaders: Travel drive hydrostatic transmission systems for skid steer loaders

• Compaction Machinery: Travel drive and vibration hydraulic systems for small and vibratory road rollers

• Concrete Transit Mixers: Mixing drum drive hydraulic systems

• Tractor Hydraulic Systems: Agricultural tractor hydraulic hitch and auxiliary drive systems

• Forklifts: Travel drive and lift hydraulic systems

• Aerial Work Platforms: Scissor lift and boom lift travel and steering hydraulic drives

• Municipal Vehicles: Sweeper and snow removal vehicle working device hydraulic drive systems

The MPV046CBBBSBSAAAABJJBBAYCANNN is ideally suited for compact construction machinery hydrostatic transmission systems requiring 210 bar continuous working pressure and displacements in the 24–46 cm³/rev range — the classic configuration for mini excavator and skid steer loader travel drive hydraulic systems.

Expert Maintenance Tips

1. Shaft Alignment and Coupling Requirements

Maintain concentricity between the pump shaft and drive shaft within 0.05 mm. Flexible couplings are strongly recommended to accommodate minor angular misalignment. The MPV046CBBBSBSAAAABJJBBAYCANNN weighs approximately 34 kg — use appropriate lifting equipment during installation and never strike the shaft end. Tighten SAE-B two-bolt mounting flange bolts in diagonal sequence to the specified torque. The splined shaft (15-tooth 16/32) engagement with the drive coupling should ensure sufficient spline engagement length. The SAE-A auxiliary mounting pad can be used for mounting auxiliary pumps or accessories.

2. Pre-Start Charge Pump Priming Procedure

As a closed-circuit pump, the MPV046CBBBSBSAAAABJJBBAYCANNN must be slowly filled through the charge pump suction port or case drain port with clean hydraulic oil before initial startup. Confirm the suction line is fully primed before starting the charge pump to prevent dry-running damage. Start the pump in jog mode until charge pressure is established before applying load. After initial startup of the closed-circuit system, run at low pressure for 10–15 minutes and check charge pressure and case drain flow. The charge relief valve is factory set at 19.5 bar (280 psi); verify compatibility with system requirements.

3. EDC Electrical Controller Commissioning

The EDC controller uses dual coil proportional solenoids with control current range of 23–132 mA. Commission using Danfoss-specific commissioning tools or the system ECU software, verifying the linear relationship between control current and displacement. First set the control signal to neutral and confirm zero pump displacement with no output flow, then gradually apply signal to verify displacement response. The system pressure protection relief valve is set at 250 bar (3625 psi); verify coordination with system safety valve settings. Control modules can be rapidly replaced in the field without pump disassembly.

4. Fluid Cleanliness and Filtration

The MPV046CBBBSBSAAAABJJBBAYCANNN employs charge pump suction filtration. The charge pump pressure line filter should be replaced after the first 500 hours of operation, then every 1000–2000 hours or per contamination indicator signal. Recommended fluid cleanliness is ISO 18/16/13 or better. Case pressure should be maintained within continuous 1.7 bar (25 psi) and maximum 5.2 bar (75 psi) limits. When using high water content or fire-resistant fluids, shorten oil change intervals and increase fluid sampling frequency due to reduced lubricity.

5. Restart Procedure After Extended Shutdown

If the pump has been idle for more than 30 days, manually rotate the shaft several turns to verify free rotation before restarting. Check for abnormal leakage at the case drain port. After startup, operate at low pressure for 10–15 minutes until charge pressure stabilizes and oil temperature reaches normal operating range before applying full load. In closed-circuit systems, pay particular attention to charge pump operation status and charge filter differential pressure. Regularly inspect the splined shaft and drive coupling engagement during operation, ensuring sufficient spline engagement length.