مضخة هيدروليكية Kubota U27-4 PVD-0B-24P-6G3-4191A لـ حفارة صغيرة

PRODUCT: Nachi PVD Main Hydraulic Pump for Kubota U27-4
1. Part Number & Compatibility
This pump is a direct bolt-on replacement for the following Kubota and Nachi identifiers:

Kubota Genuine Part Number: RH418-61110

OEM Manufacturer Model: Nachi PVD-0B-24P-6G3-4191A

Machine Application: Kubota U27-4 (Zero Tail Swing Mini Excavator)

2. Technical Specifications
Pump Type: Variable Displacement Axial Piston Pump

Flow Configuration: Combined triple or quad-flow output (Powering travel, boom, and auxiliary circuits)

Rated Pressure: High-pressure capability for maximum breakout force

Mounting: SAE standard or Kubota-specific engine flange mount

Drive Shaft: Splined shaft designed to mate with the engine flywheel coupling

3. Key Performance Advantages
Load-Sensing Technology: The PVD series is designed to deliver flow only when the operator demands it, significantly reducing fuel consumption and heat buildup.

Multi-Function Control: Optimized to handle three or more simultaneous movements (e.g., digging while swinging and traveling) without a significant drop in speed.

Compact Design: Engineered specifically for the tight engine compartment of the U27-4, ensuring proper clearance for cooling and maintenance.

Quiet Operation: Nachi’s specialized piston and swashplate geometry minimizes hydraulic "hum" and vibration, improving operator comfort.

4. Signs of Pump Failure
If your U27-4 is experiencing the following, the main pump may require inspection or replacement:

Slow or sluggish hydraulic cycles across all functions.

Excessive whining or grinding noise coming from the pump area.

Hydraulic oil overheating rapidly.

Machine "tracking" to one side (uneven flow to travel motors).

Visible metal shavings in the hydraulic return filter.