MPT044 Danfoss Series 40 Tandem Axial Piston Pump 44cc 385bar

Product Overview

The MPT044 (and MPV044) is a Danfoss (formerly Sauer-Danfoss) Series 40 swash-plate variable-displacement axial piston hydraulic pump designed for medium-power closed-circuit hydrostatic transmissions. MPT denotes the tandem (dual-section) configuration, while MPV is the single-pump version. With a displacement of approximately 44 cm³/rev and system pressures up to 385 bar, it offers compact size, high power density, and a wide range of control options. Our MPT044D-CCSMBDBA and companion models such as MPT025, MPT035, MPT044, MPT046, and related M46 units are manufactured to original technical specifications, providing 100% interchangeability (flange, shaft end, ports, and control interfaces fully match OEM) and 100% simulated-duty testing. They deliver reliable performance in mobile high-pressure applications as cost-effective direct replacements for genuine Danfoss pumps.

Technical Specifications 

• Model: MPT044D-CCSMBDBA and variants (series also available in MPT025, MPT035, MPT044, MPT046, MPV044, M46 related)
• Displacement: approx. 44 cm³/rev (per section; tandem is dual)
• Max system pressure: up to approx. 345–385 bar
• Charge pump displacement: approx. 16.4 cm³/rev (typical)
• Charge pressure setting: approx. 20 bar
• Maximum speed: approx. 3600–4100 rpm (configuration dependent)
• Control: Direct displacement control (DDC) or optional manual, hydraulic, electric, etc.
• Mounting flange: SAE B
• Approx. weight: single pump approx. 25 kg; tandem higher
• Design: Swash-plate variable axial piston pump for closed circuits; single or tandem options

Key Technical Advantages

1. Precision swash-plate piston design with high power density delivers excellent overall efficiency and fast response for medium-power closed-circuit transmissions.
2. Compact dimensions combined with multiple shaft, control, and filtration options facilitate integration into space-constrained mobile equipment.
3. High-strength bearings and optimized sealing support continuous high-pressure duty with long service life and high reliability.
4. Full dimensional and performance interchangeability plus rigorous simulated-duty testing guarantee drop-in replacement of original Danfoss units, minimizing downtime and lifecycle costs.

Application Areas

Suitable for medium-power mobile equipment closed-circuit hydrostatic drives, including compact loaders, rollers, agricultural machinery, forestry equipment, municipal vehicles, and industrial transmissions. Typical machines include Bobcat skid-steer loaders, Wirtgen/Vögele/Hamm compaction equipment, Caterpillar compact excavators, and similar hosts.

Expert Maintenance Tips

• Verify exact match of mounting flange, shaft end (spline), and port orientation before installation; ensure correct charge system and filtration configuration.
• Use recommended cleanliness hydraulic fluid; regularly check charge pressure, system pressure, and case drain temperature.
• Monitor displacement control response and noise during commissioning; avoid prolonged over-pressure operation.
• Use matching filter elements and seals during service; record operating parameters to detect early efficiency decline.