Volvo Oilgear PVG100 PVG130 Piston Pump | VOE 11704284 11709023

The Oilgear PVG100 and PVG130 Series of heavy-duty, open-loop axial variable displacement piston pumps manufactured by Chengyuan Hydraulic are premium fluid power components engineered to fully cross-reference the rigid operational benchmarks of Oilgear Company and the tailored application profiles of VOLVO Wheel Loaders. Replicating the exact flow dynamics and structural mounting profiles of genuine Volvo parts—including part numbers VOE 11704284, 11709023, 11173538, 11411016, 15068638, and 15068597—this series is optimized for heavy construction frames (such as L150E, L150F, L180E, L180F, L220D, L220E, and L220F) running under non-stop breakout forces and heavy-duty steering routines. To prevent the premature inner-face spalling common in aftermarket solutions under abrasive site conditions, Chengyuan utilizes an advanced “Hard-on-Hard” component engineering matrix and low-friction polymerous hydrodynamic journal barrel bearings. This design guarantees 100% original-place interchangeable plug-and-play installation onto standard Volvo SAE input shafts, split-flange manifolds, and specialized Load-Sensing (LS) command circuits, delivering identical pressure retention limits up to 344.8 bar. Prior to leaving our testing facility, every unit undergoes 100% simulated continuous full-load duty cycle logging and high-pressure circuit testing, offering global fleet operators a reliable replacement pump that minimizes machine downtime.

Technical Specifications :

• Brand & OEM Application Matching: Replaces Oilgear PVG Series / Direct drop-in for VOLVO Heavy Construction Equipment

• Target Volvo Genuine Part Numbers Interchanged: VOE 11704284, VOE 11709023, VOE 11173538, VOE 11411016, VOE 15068638, VOE 15068597

• Core Product Series Group: PVG Open-Loop Axial Piston Variable Displacement Platforms

• Volumetric Displacement Classes Matrix:

  • PVG-100 Configuration: Maximum geometric displacement 98.3 $cm^3/rev$ (100 cc main loading / steering variant)

  • PVG-130 Configuration: Maximum geometric displacement 130.2 $cm^3/rev$ (130 cc high-flow implement variant)

• Maximum Rated Continuous Working Pressure:

  • PVG-100 Frame Size: Sustains up to 344.8 bar (34.5 MPa / 5000 PSI)

  • PVG-130 Frame Size: Sustains up to 258.6 bar (25.8 MPa / 3750 PSI)

• Maximum Peak Intermittent Pressure Boundary:

  • PVG-100 Frame Size: Peak cutoff pressure peaks up to 400.0 bar (40.0 MPa / 5800 PSI)

  • PVG-130 Frame Size: Peak cutoff pressure peaks up to 293.1 bar (29.3 MPa / 4250 PSI)

• Rotational Input Drive Velocity Limits: Up to 2400 rpm max under positive inlet metrics

• Control Configuration System: 4-way pilot-operated variable displacement control module integrating Load-Sensing (LS) flow tracking and proportional mechanical horsepower limiters

• Assembled Structural Dry Weight: Approximately 52 kg to 55 kg (115 lbs – 121 lbs)

• Allowable Operating Fluid Viscosity Range: 65 SSU to 2000 SSU (Handles low-lubricity and low-viscosity fluids efficiently)

Key Technical Advantages:

• Advanced Hardened “Hard-on-Hard” Internal Rotating Technology: Heavy quarry wheel loaders continuously ingest micro-abrasive dust particles into their main reservoirs. Unlike legacy pumps using soft bronze faces running against steel, Chengyuan applies specialized tool-grade steel alloys through a deep-carburizing process. Hardened steel piston shoes run directly on a hardened swashblock face, and a hardened cylinder barrel meets a hardened valve plate (all over 60HRC). This design resists abrasive erosion and maintains a flat volumetric efficiency curve.

• Patented Cylindrical Polymerous Journal Bearing Mechanism: To achieve high power density within the PVG100/130 frame, the internal structure eliminates traditional heavy rolling element bearings around the input drive line. It uses a high-grade polymerous hydrodynamic journal bearing that wraps around and directly cradles the rotating cylinder barrel. Under active pressure, a micro-inch hydraulic oil wedge forms across this boundary, absorbing severe radial unbalance forces during high-tilt swashplate cycles.

• High-Response 4-Way Pilot-Operated Control Architecture: The variable control block features an integrated 4-way servo pilot valve that monitors the loader’s main manifold load-sense signals. This module responds quickly to abrupt mechanical breakout resistances, executing a full-stroke displacement shift in 40 to 50 milliseconds. This ultra-fast stroke adjustment protects the engine from stalling and minimizes system pressure spikes.

• Force-Fed Pressure Lubricated Hydrostatic Swashblock Assembly: The internal swashblock features dedicated internal lubrication galleries that continuously feed pressurized system oil directly to its sliding support arcs. This configuration maintains a steady hydrostatic fluid cushion beneath the tilting assembly, eliminating boundary metal-to-metal friction and ensuring smooth, un-delayed displacement adjustment even during continuous 345 bar peak operations.

Application Areas:

• VOLVO Large-Scale Heavy Earthmoving Wheel Loaders: Main high-pressure implement work pump, primary articulated steering booster pump, and multi-function auxiliary loader linkage hydraulics for VOLVO L150E, L150F, L180E, L180F, L220D, L220E, and L220F.

Expert Maintenance Tips:

• Perform a Minimum 3-Cycle Closed-Loop Pressure Flush of the Entire Machine Reservoir and Lines Prior to Installing the Replacement Pump: This is a non-negotiable directive for high-pressure piston pumps on construction equipment! When an original pump fails, microscopic metal shavings and hardened cavitation debris travel throughout the loader’s large cooler cores, lines, and tank corners. Installing a new pump into an un-flushed system exposes it to circulating debris, leading to rapid contamination wear and failure within the first 20 operating hours. The circuit must be professionally flushed and filtered to NAS Class 7 or better.

• The Pump Case Drain Plumbing Must Be Single-Routed to the Reservoir and Free of Any Restrictions: Due to its high-load hydrodynamic journal bearing layout, the internal case leakage flow rate of the PVG100/130 series is higher than that of standard light-duty designs. Ensure the upper #16 SAE case drain connection is plumbed independently back to the hydraulic tank with an unrestricted hose. Do not route this line through quick-disconnect fittings, valves, or return filters. If case backpressure exceeds 0.15 MPa, it will blow out the front high-pressure shaft seal and disrupt the internal barrel oil film, causing immediate internal damage.

• Verify Cold-Start Oil Viscosity Limits and Avoid High Intake Vacuum to Stop Cavitation Pitting: The VOE 11704284 main pump experiences sharp flow demand changes during bucket penetration cycles. Ensure all intake flange connections are airtight and use high-grade anti-wear hydraulic oil within the 65-2000 SSU operating window. In cold-weather environments, run the machine at idle with short, no-load control strokes for at least 15 minutes until the case drain oil temperature surpasses 14°F (-10°C) before initiating heavy breakout loads, protecting the pistons from suction cavitation damage.