AP2D Series Hydraulic Piston Pump | AP2D18 AP2D25 AP2D36 | TB145 TB150S

LIC Hydraulic’s AP2D Series tandem axial piston pumps are the industry-leading power units for mini-excavators. This series, including AP2D12, AP2D18, AP2D25, AP2D28, and AP2D36, provides dual independent flows within a single compact housing, optimized for compact machinery under 6 tons. Specifically for part number AP2D25LV1RS7-928-4, we guarantee 100% Drop-in Interchangeability for the Takeuchi TB145 and TB150S. Engineered with a robust swash-plate design and wear-resistant valve plates, every AP2D pump undergoes 100% factory dynamic load testing to ensure zero-defect reliability in demanding trenching and utility operations.

Technical Specifications (Bulleted List)

• Series Models: AP2D12, AP2D18, AP2D25, AP2D28, AP2D36

• Configuration: Tandem Variable Displacement Piston Pump

• Rated Pressure: 21.0 MPa (3045 PSI)

• Peak Pressure: 25.0 MPa (3625 PSI)

• Compatibility: Takeuchi TB145, TB150S, TB153, and various 2-5 ton mini-excavators.

• Control Types: Constant Power, Load Sensing, or Remote Pressure Control.

• Housing: High-strength aluminum or cast iron based on specific frame size.

Key Technical Advantages

• Ultra-Compact Tandem Design: By integrating two rotating groups on a single shaft, the AP2D series minimizes the drivetrain footprint, allowing for easier maintenance in cramped engine compartments.

• Rapid Displacement Response: The internal regulator adjusts flow instantly relative to system pressure, preventing engine stalling while ensuring smooth simultaneous operation of the boom and arm.

• Advanced Valve Plate Metallurgy: Utilizing bimetallic valve plates and hardened steel pistons to maintain high volumetric efficiency and minimize heat generation during long duty cycles.

• High Load Capacity: Heavy-duty needle bearings are used to handle the high radial loads common in rigorous excavation tasks, significantly extending the service life.

Application Areas

• Mini-Excavators: Primary hydraulic source for brands like Takeuchi, Kubota, and Yanmar.

• Compact Track Loaders: Driving the main hydrostatic transmission and implement circuits.

• Auxiliary Power: Providing reliable flow for hydraulic attachments like augers and breakers.

Expert Maintenance Tips

• Initial Priming: Always fill the pump case with clean hydraulic oil through the drain port before the first start. These high-speed pumps will experience catastrophic internal damage if started dry for even a few seconds.

• System Contamination Flush: If the previous pump failed due to internal breakage, you must flush the entire hydraulic circuit and replace all filters. Micro-debris from the old pump will act as grinding paste on the new unit’s precision surfaces.

• Regulator Calibration: The AP2D regulator is factory-set to match specific engine torque curves. Do not adjust the regulator screws without a pressure gauge, as improper settings can lead to sluggish performance or engine overload.