MPT046CEVC Parker Axial Piston Pump | 345 Bar 46cc

Product Overview

The MPT046CEVC is a 46 cm³/rev displacement model from Parker’s (formerly Sauer Danfoss) MPT series of axial piston pumps, belonging to the Sauer Danfoss Series 40 platform. The MPT series is a high-performance variable displacement axial piston pump line designed for mobile and industrial hydraulic systems, featuring a swashplate variable displacement mechanism, open and closed circuit compatibility, high power density, compact construction, multiple control options and high reliability.

Product Type Clarification: The MPT046 series is an axial piston variable displacement pump. While some distributors categorize it under “MPT Motors,” according to Parker/Sauer Danfoss official product definitions, the MPT series belongs to the Series 40 axial piston pump platform. This product is a variable pump configuration intended for hydraulic systems requiring precise flow and pressure control.

The model code breaks down as follows: MPT046 identifies the MPT series 46 cm³/rev frame size; C indicates Series 40 C-version design; EVC is the control type and regulator configuration (E=electric control, V=variable control, C=standard configuration); SAA is the mounting flange and shaft configuration (SAE B flange, splined shaft); BAAAB is the port configuration and additional options; KKAKD is the control option combination; MFB is the filtration and charge pump configuration; CAA is the shaft seal and rotation configuration; BKKAKUMFBNBP is the additional option combination including charge pump specification and charge relief valve setting.

The MPT046 features an integral charge pump as standard, with 13.9 cm³/rev charge pump displacement and 19.5 bar (285 psi) charge relief valve setting, providing stable charge pressure and cooling/lubrication flow for closed-circuit systems. The system pressure regulation range is 140–345 bar (2,030–5,000 psi), meeting the demands of various medium-to-high pressure hydraulic systems.

Every MPT046CEVC unit undergoes 100% simulated operating-condition bench testing prior to shipment. Mounting flange, shaft end and port dimensions comply with SAE standards and are identical to the original Parker/Sauer Danfoss MPT046, ensuring true drop-in interchangeability with zero modification required.

Technical Specifications

MPT Series Frame Size Specifications:

• MPT023: Displacement 23 cm³/rev, system pressure regulation 140–345 bar, rated speed 4,000 rpm, SAE B mounting flange

• MPT025: Displacement 25 cm³/rev, system pressure regulation 140–345 bar, rated speed 4,000 rpm, charge pump displacement 11.8 cm³/rev (M25 PV), SAE B mounting flange

• MPT035: Displacement 35 cm³/rev, system pressure regulation 140–345 bar, rated speed 4,000 rpm, charge pump displacement 16.4 cm³/rev (M35 PT), SAE B mounting flange

• MPT044: Displacement 44 cm³/rev, system pressure regulation 140–345 bar, rated speed 4,000 rpm, charge pump displacement 16.4 cm³/rev (M44 PT), SAE B mounting flange

• MPT046 (This Model): Displacement 46 cm³/rev, system pressure regulation 140–345 bar, rated speed 4,000 rpm, charge pump displacement 13.9 cm³/rev (M46 PV), charge relief valve 19.5 bar (285 psi), SAE B mounting flange

MPT046CEVC Additional Specifications:

• Model Code: MPT046CEVC (Full Model: MPT046CEVCSAABAAABKKAKDMFBCAABKKAKUMFBNBP)

• Manufacturer Part Number: 83009846

• Type: Variable displacement axial piston pump, swashplate design

• Displacement: 46 cm³/rev (2.81 in³/rev)

• Rated Pressure (Continuous): 345 bar (5,000 psi)

• Maximum Pressure (Intermittent): 385 bar (5,584 psi)

• System Pressure Regulation Range: 140–345 bar (2,030–5,000 psi)

• Rated Speed: 4,000 rpm

• Speed Range: Up to 4,100 rpm

• Theoretical Torque: ~220 N·m

• Control Type: Electric Displacement Control (EDC) + Variable Control

• Mounting Flange: SAE B flange

• Shaft Type: Splined shaft

• Port Connections: Twin ports, SAE standard

• Integral Charge Pump Displacement: 13.9 cm³/rev (0.85 in³/rev)

• Charge Relief Valve Setting: 19.5 bar (285 psi)

• Auxiliary Mounting Pad: SAE A / SAE B

• Input Shaft Options: Splined, tapered or straight key

• Circuit Type: Open circuit / closed circuit compatible

• Operating Temperature Range: -40°C to +115°C

• Hydraulic Fluid: Mineral oil (ISO VG46/68), synthetic oil, water glycol

• Weight: ~60 kg (132 lbs)

• Dimensions: 450 × 350 × 350 mm

Key Technical Advantages

1. Swashplate Variable Displacement Mechanism for Precise Displacement Modulation

The MPT046CEVC employs a swashplate axial piston variable pump design, adjusting swashplate angle through a servo control system to achieve infinitely variable displacement from zero to maximum. The EVC control configuration supports Electric Displacement Control (EDC), accepting 12V or 24V electrical signals for precise flow and pressure control. The system pressure regulation range of 140–345 bar allows flexible setting according to application requirements, ensuring optimal power matching under varying load conditions.

2. Integral Charge Pump and Charge Relief Valve for Stable Charge Supply

The MPT046 features an integral charge pump as standard, with 13.9 cm³/rev charge pump displacement and 19.5 bar (285 psi) charge relief valve setting. The charge pump provides stable charge pressure and cooling/lubrication flow for closed-circuit systems, ensuring the main pump always receives adequate inlet flow under high-speed, high-pressure conditions. For applications where charge pump displacement does not meet system requirements or continuous operation at low input speeds (below 1,500 rpm), high shock loads, or excessively long system piping, Parker recommends consulting a factory representative for charge pump selection verification.

3. High Power Density and Compact Construction

The MPT046 achieves high power output in a compact structure weighing approximately 60 kg, with power density leading among comparable swashplate pumps. SAE B standard mounting flange and splined shaft design facilitate integration into space-constrained mobile equipment hydraulic systems. The cast iron housing provides excellent rigidity and heat dissipation.

4. Multiple Control Options and Flexible Adaptation

The MPT series supports multiple control configurations including Hydraulic Displacement Control (HDC), Electric Displacement Control (EDC), Mechanical Displacement Control (MDC) and Forward-Neutral-Reverse (FNR) control. The MPT046CEVC’s EVC control option supports electric displacement control for seamless integration with machine electronic control systems.

5. 100% Simulated Load Testing & Drop-In Interchangeability

Each MPT046CEVC unit is bench-tested under simulated operating conditions prior to dispatch, covering pressure cycling, displacement response and thermal variation. Mounting flange, shaft end and port dimensions comply with SAE standards, matching the original Parker/Sauer Danfoss MPT046 exactly, enabling direct replacement without pipework or interface modification.

Application Areas

The MPT series pumps are deployed across demanding mobile and industrial hydraulic applications:

• Construction: skid steer loader drive systems, compact excavator hydraulic systems, road roller drives

• Agriculture: tractor hydraulic systems, combine harvester drive systems, planter hydraulic drives

• Material Handling: forklift hydraulic systems, aerial work platform drives

• Marine & Offshore: ship deck machinery hydraulic systems, steering gear drives

• Industrial: industrial hydraulic power units, metallurgical equipment hydraulic systems, press drives

• Specialty Vehicles: street sweeper hydraulic systems, snow removal equipment drives, municipal vehicle hydraulic systems

Expert Maintenance Tips

1. Charge Pump Selection Verification: The MPT046’s charge pump displacement (13.9 cm³/rev) should typically satisfy the 10% rule relative to main pump displacement. However, this rule may not apply under the following conditions: continuous operation at low input speeds (below 1,500 rpm), high shock loads, excessively long system piping or low-speed high-torque motor applications. In such cases, refer to Parker BLN-9885 “Drive Circuit Component Selection Guide” for charge pump selection verification, or contact a Parker representative for system evaluation.

2. Control Signal Calibration and Displacement Verification: The EVC electric control configuration requires control signal calibration after installation to confirm minimum and maximum displacement positions match the technical manual. Pilot control pressure should remain stable within the technical manual specified range with ±1 bar variation. If displacement response exhibits lag or drift, inspect the control spool for sticking and the pilot circuit for air entrainment.

3. Drain Line Management and Housing Priming: The drain port must return to the reservoir independently—housing back pressure must not exceed 2 bar. The drain line end must remain submerged to prevent air ingestion. Fill the housing with clean hydraulic oil before first startup. After extended shutdown, fill the housing again before restarting.

4. Oil Cleanliness and Temperature Control: Maintain system oil cleanliness at ISO 4406 18/16/13 or better. Operating oil temperature should be kept below 80°C—system temperature must not exceed 115°C at any point. Replace hydraulic oil and filter after the first 500 hours, then follow a 2,000-hour or annual replacement cycle. Refer to the Parker technical manual for operating viscosity range; VG 46 is recommended at 60°C operating temperature.

5. Periodic Swashplate Mechanism and Piston Group Inspection: The MPT046’s swashplate bearings, piston slippers and cylinder bores are primary wear components. Inspect swashplate bearing clearance, piston slipper wear and cylinder bore clearance every 2,000 hours. Abnormal efficiency loss, noise or vibration requires immediate shutdown and service. Use Parker original specification parts when replacing piston groups or swashplate bearings to ensure fit accuracy and assembly torque per technical manual requirements.