Rexroth AP2D12 OEM 6680010 hydraulic pump for Bobcat 331 D E G 334 430 mini excavator
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1. Product Overview
The AP2D12 is a high-pressure, tandem variable displacement axial piston pump. As the primary hydraulic power source for Bobcat’s 2.5 to 4.0-ton class machines, it is designed to provide high volumetric efficiency and precise control. This pump allows for smooth, simultaneous operation of the boom, arm, bucket, and travel functions. With 13 years of expertise in Rexroth-style hydraulics, we provide units calibrated to restore your excavator's original breakout force and cycle times.
2. Comprehensive OEM Part Number Compatibility
This pump is a 100% direct "bolt-on" replacement for Bobcat factory part numbers and Rexroth/Uchida specifications.
Common Part Numbers:
6680010, 6676165, 6675547.
Manufacturer Model:
AP2D12LV3RS7 (and related AP2D series configurations).
Machine Fitment:
Bobcat 331 Series: 331D, 331E, 331G.
Bobcat 334 Series: 334 (Standard and G-series).
Bobcat 430 Series: 430 ZTS (Zero Tail Swing), 430 Fast Track.
3. Technical Specifications & Performance
Pump Type: Tandem Axial Piston Pump (Variable Displacement).
Max Working Pressure: Rated up to 30.0 - 35.0 MPa (350 bar) to meet factory performance standards.
Internal Components: Features hardened cylinder blocks, precision-ground pistons, and high-load bearings for long-term durability in high-cycle construction applications.
Control System: Integrated Pressure Compensator (PC) and Load Sensing (LS) valves to optimize engine power management and reduce fuel consumption.
Drive Shaft: OEM-standard spline shaft for perfect alignment with the engine coupling.
4. Why Partner With a 13-Year Industry Expert?
Technical Precision: We specialize in the AP2D series. We ensure the pump regulators are adjusted to Bobcat’s specific flow curves, preventing the "stalling" or "sluggishness" common with generic aftermarket pumps.
Rigorous Bench Testing: Every unit undergoes a 100% performance test on a professional hydraulic bench. We verify flow rates at various pressures and ensure zero leakage at maximum load.
Factory-Direct Value: Access Original New or Premium OEM-spec units at competitive wholesale pricing, offering significant savings over local dealership retail.
Global Rapid Logistics: Units are secured in reinforced, shock-proof export wooden crates. We offer express delivery via DHL, FedEx, or UPS, typically arriving 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 case 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 metal fragments are the primary cause of 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.
Air Bleeding: After installation, run the engine at low idle and cycle all hydraulic functions without load to purge any trapped air from the circuit.
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 status.
Technical Guidance: Our expert team is available 24/7 to provide professional advice on installation, regulator adjustments, and hydraulic troubleshooting.