مضخة هيدروليكية KYB PSVD2-27E-21 19020-20800 لـ حفارة صغيرة Takeuchi TB145 TB153 FR TB160C

1. Product Identification
Component: Main Hydraulic Variable Displacement Axial Piston Pump Assembly

Manufacturer Model Number: KYB PSVD2-27E-21 (PSVD Series Architecture)

Takeuchi OEM Part Numbers: 19020-20800, 19020-22300, 19020-22600, 19020-22000, 19020-24800, 19020-25800 (1902020800, 1902022300, 1902022600, 1902022000, 1902024800, 1902025800)

Machine Compatibility:

Takeuchi TB145

Takeuchi TB153 FR

Takeuchi TB160C Mini Excavator

Condition: Genuine Original New / Premium OEM Specification Equivalent

2. Technical Specifications
Pump Type: Variable Displacement Axial Piston Pump with Auxiliary Gear Pump Section

System Performance: Factory-engineered displacement thresholds, flow profile, and operating pressure parameters (up to 24.5 MPa / 245 bar) specifically matched to Takeuchi 4.5 to 6.0-ton mini excavator hydraulic circuits.

Integrated Control Network: Features load-sensing flow regulators to balance fluid delivery across multi-function digging, tracking, and boom swing operations without causing engine lugging.

Drive Interface: Precision mounting flange with heavy-duty input spline shaft engineered to couple directly with the engine flywheel dampener drive.

3. Critical Installation Requirements
Hydraulic Pump Housing Priming (Mandatory)
Before starting the engine, manually fill the main pump casing with clean, fresh hydraulic fluid through its highest case drain port. Running an axial piston pump dry—even for a few seconds—will score the valve plate and piston slippers, causing immediate total pressure loss.

Air Bleeding & Initial Startup Procedure
After installation, loosen the air bleed port on top of the pump housing. Crank the engine with the fuel supply disabled until clear, bubble-free oil flows from the port, then retighten. Allow the machine to idle under no load for 10 to 15 minutes to purge any trapped air from the hydraulic loop.

Fluid & System Decontamination
If replacing a pump that suffered internal mechanical failure, completely drain and clean the main hydraulic oil reservoir, flush all circuit lines, and clean the oil cooler. Replace all return and suction filter elements before starting the engine.

Pilot & Main Relief Pressure Inspection
Verify system pressure relief valve settings upon startup. Incorrect pressure settings can lead to sluggish hydraulic response, circuit overheating, or engine stalling under heavy digging loads.

4. Frequently Asked Questions (FAQ)
Q: Are part numbers 19020-20800, 19020-22300, 19020-22600, 19020-22000, 19020-24800, and 19020-25800 interchangeable?
A: Yes. These part numbers represent standard Takeuchi factory engineering revisions, model updates, and supersessions across the TB145, TB153 FR, and TB160C lines. All cross-reference to the KYB PSVD2-27E-21 platform with identical physical mounting dimensions, input shaft splines, and port connections.

Q: My Takeuchi TB145 bogs down or stalls the engine during combined travel and boom functions. Is the pump failing?
A: Engine stalling under load usually indicates worn internal valve plates or sticking load-sensing pump regulators failing to destroke output as hydraulic demand spikes. Installing a replacement pump assembly restores balanced engine-to-hydraulic power delivery.

Q: Does the unit arrive complete with the rear gear pump section attached?
A: Yes. The unit comes fully assembled as a single integrated pump assembly, including the main axial piston pump section, factory-adjusted regulator blocks, and the auxiliary gear pump section.

5. Shipping & Logistics
Packaging: Preserved with rust-inhibiting storage oil, fitted with heavy-duty port plugs, and packed inside an export-safe protective crate or box.

Transit Time: Global express air freight via DHL/FedEx/UPS typically delivers within 3 to 7 business days directly to your workshop or job site.