Rexroth AP2D9LV1RS7-962-0 172456-73100 hydraulic pump for Yanmar VIO20 VIO20-2 mini excavator
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1. Product Overview
The Rexroth AP2D9LV1RS7-962-0 is a tandem variable displacement axial piston pump. As the primary pump for the Yanmar ViO20, it is engineered to deliver high power density within a compact frame, specifically designed for zero tail swing operations. This pump utilizes a sophisticated flow-sharing system that allows the operator to travel and use the front workgroup (boom, arm, bucket) simultaneously without a loss in speed or engine "bogging."
2. Comprehensive OEM Part Number Compatibility
This pump is a 100% direct "bolt-on" replacement for the following Yanmar factory part numbers and Rexroth specifications:
Yanmar Part Numbers: * 172456-73100
172956-73100
172173-73100
Rexroth Model Code: * AP2D9LV1RS7-962-0
(Also cross-compatible with select AP2D9 sub-series for the ViO20 chassis)
Machine Fitment:
Yanmar ViO20 (Zero Tail Swing)
Yanmar ViO20-2
Yanmar ViO20-3 (Please verify serial number)
3. Technical Specifications & Performance
Pump Series: Rexroth/Uchida AP2D series.
Pump Type: Tandem Axial Piston (Variable Displacement).
Maximum Pressure: Rated for continuous high-pressure operation (21.0 - 25.0 MPa) to maintain factory-spec breakout and lifting force.
Control System: Integrated load-sensing and pressure-limiting valves, ensuring that hydraulic flow is only produced upon demand, saving fuel and reducing system heat.
Internal Components: Features hardened alloy cylinder blocks and precision-ground piston sets for superior volumetric efficiency and longevity in high-cycle applications.
4. Why Partner With a 13-Year Industry Expert?
Technical Synchronization: We understand the specific flow curves of the ViO20. Our pumps are pre-calibrated to Yanmar’s factory specifications, ensuring the machine tracks straight and the joystick response is crisp and predictable.
Comprehensive Bench Testing: Every unit undergoes a 100% performance test on a professional hydraulic bench. We verify flow rates, pressure compensation, and seal integrity under maximum operating temperature.
OEM Material Quality: We provide Original Rexroth New or Premium OEM-spec units that bypass the high markups of local dealerships while providing identical service life.
Global Rapid Logistics: Secured in reinforced, export-standard packaging. Delivery via DHL, FedEx, or UPS typically arrives in 3 to 7 business days.
5. Critical Installation & Maintenance Protocol
Case Priming (Mandatory): You must fill the pump housing with clean, fresh hydraulic oil through the highest drain port before starting the engine. Running the pump "dry" will cause immediate and irreversible internal damage.
System Decontamination: If the previous pump failed due to internal breakage, you must flush the hydraulic tank, lines, and oil cooler. Residual metallic debris is the primary cause of premature failure in replacement pumps.
Filter & Oil Service: Always install a new high-efficiency hydraulic return filter and suction strainer. Ensure the hydraulic oil is clean and meets ISO VG46 standards to protect the precision-lapped internal surfaces.
6. Ordering & Professional Support
Fitment Verification: To ensure 100% accuracy, please provide your Machine Serial Number or a photo of the nameplate on your existing pump.
Instant Quote: Contact us today for up-to-date pricing, tiered quality options, and current stock availability.
Technical Guidance: Our expert team is available 24/7 to provide professional advice on installation, air bleeding, and hydraulic troubleshooting.