Parker PV040R1K1T1NMFC Hydraulic Pump

Parker PV040R1K1T1NMFC Variable Displacement Axial Piston Pump

The Parker PV040R1K1T1NMFC is a swashplate-design axial piston pump engineered for open-circuit hydraulic drives requiring precise dynamic response, high volumetric efficiency, and structural endurance under extreme mechanical stress. Manufactured in Chemnitz, Germany under Parker Hannifin’s high-pressure PVplus product line, the unit delivers a geometric displacement of 40.0 cm³/rev (2.44 in³/rev) with continuous operating pressure limits rated at 350 bar (5,000 PSI) and dynamic peak overshoots up to 420 bar (6,000 PSI).

The model architecture incorporates an oversized valve block cast with an integrated pre-compression volume, dampening fluid ripple excitation and structural cavitation during port-plate cross-over intervals. The swashplate is supported by hydrostatic saddle bearings to absorb heavy radial shock loads commonly encountered in cyclic hydraulic circuits. This variant features an integrated single-spool hydromechanical Load-Sensing (Flow & Pressure) Compensator (code MFC) configured with an ISO 3019-2 4-hole metric mounting interface and a keyed cylindrical drive shaft.

Model Details:

• Complete Model Code / Ordering Designation: PV040R1K1T1NMFC (Series Design 46 / Compensator Design 45)
• Manufacturer Part Number (MPN): PV040R1K1T1NMFC / PV040R1K1T1NMFC4645
• Factory Manufacturing Origin: Germany

Technical Details

Features

1. Advanced Ripple Pre-Compression Volume: Internal relief architecture minimizes discharge pressure pulsations and structural pipe chatter, lowering noise below marine cabin decibel limits.
2. Integral Load-Sensing Dynamic Compensator: Maintains a constant differential margin across variable throttle orifices, circulating only demanded fluid flow and drastically reducing thermal load.
3. Heavy-Duty Hydrostatic Saddle Bearings: Engineered to withstand sustained cyclical pressure shocks without premature swashplate galling, extending overhaul intervals beyond 15,000 operating hours.
4. Modular Thru-Drive Flexibility: Factory-machined through-drive splines accommodate secondary gear pumps (e.g., Parker PGP series) or auxiliary pilot-charge pumps without requiring intermediate cross-drive gearboxes.
5. Extreme Mechanical Availability: Symmetrical multi-port drain layout enables horizontal, vertical shaft-up, or side-mount engine installations with complete sub-housing air deaeration.

Compatibility

• Parker Hannifin Ordering Codes: PV040R1K1T1NMFC, PV040R1K1T1NMFC4645, PV040R1K1T1NMMC (Standard pressure cutoff variant)
• OEM Spare Assembly References: Parker Chemnitz 46-Design PV Frame 2 series
• Rexroth Interchangeability: Drop-in envelope alternative for Bosch Rexroth A10VSO45DFR1/31R-PPA12N00 (check port layout clearances and pipe flange schedules prior to swap).
• Danfoss / Sauer-Sundstrand Interchange: Alternative replacement for Series 45 J-Frame (45cc) Load-Sensing open-circuit variable units.

Frequently Asked Questions

What is the primary difference between Parker compensator codes MFC and MMC?

The MMC compensator is a pure pressure-limiter control that destroke the pump when the primary system pressure reaches the preset limit. The MFC version installed on the PV040R1K1T1NMFC pump includes both a main pressure cut-off and a load-sensing differential control spool. It senses downstream actuator pressure variations via a pilot signal line and modulates flow accordingly to maintain high hydraulic efficiency.

Can the Parker PV040 pump operate using water-glycol (HFC) fluid?

Yes. The standard Parker PVplus architecture can run on HFC fire-resistant hydraulic fluid; however, operating parameters must be derated. Maximum continuous operating pressure on HFC fluids is capped at 210 bar (3,000 PSI), drive speed should not exceed 2,000 RPM, and fluid operating temperatures should stay below 50°C to prevent seal degradation and cavitation erosion.

Can I convert this pump from clockwise (CW) to counter-clockwise (CCW) rotation?

Conversion requires disassembling the pump and replacing the valve timing plate with the counter-clockwise version (Part No. RK-PVBG2SSL46). The port kidney orientations, compensator block placement, and internal porting channels are direction-specific. Attempting to invert rotation by reversing electric motor wiring alone will destroy the unit instantly.

Why is my pump case drain line heating up excessively during zero-flow standby?

If the pump is idling at high pressure with no cylinder or motor movement, internal bypass flow over the compensator edge will heat the case fluid. A normal case drain line temperature should not exceed the reservoir bulk fluid temperature by more than 15°C to 20°C. If the case line feels scalding to the touch (>80°C), internal barrel-to-port plate slippage or excessive piston clearance wear is occurring, signaling immediate rebuild requirements.

How do I prime the pump if installed above the minimum reservoir fluid level?

When installed above the oil level, the inlet line length must be as short as possible with zero high-point air traps. Use an oversized suction line to maintain suction velocity below 1.0 m/s. Pre-fill both the casing and the suction pipe, crack the bleed port screw at the compensator interface, and turn the motor in short 1-second electrical jogs until solid, bubble-free fluid exits the bleed point. Never run the pump continuously under suction lift without an established prime.