Гидронасос Nachi ПВД-0Б-24П 7209325 7209326 для мини-экскаватора Bobcat E25 E26 E27Z

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

Manufacturer Model Number: Nachi PVD-0B-24P-6G3-4191A (PVD Series Architecture)

Bobcat OEM Part Numbers: 7209325, 7209326

Machine Compatibility:

Bobcat E25

Bobcat E26

Bobcat E27Z 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

Output Performance: Factory-engineered displacement parameters, flow profile, and operating pressure limits specifically calibrated for Bobcat 2.5 to 2.7-ton mini excavator hydraulic circuits.

Integrated Control Network: Features integrated load-sensing control regulators to manage multi-function fluid distribution and prevent engine lugging under heavy digging loads.

Drive Configuration: Heavy-duty input spline shaft and precision mounting flange designed to attach directly to 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 fresh, clean hydraulic fluid through its highest case drain port. Operating an axial piston pump dry—even for a few seconds—will score the swash plate, valve plate, and piston slippers, causing immediate total pressure loss.

Air Bleeding & Initial Startup Procedure
After mounting and filling the pump, loosen the top air bleed port on the pump housing. Crank the engine with the fuel delivery disabled until a steady stream of bubble-free hydraulic oil flows out, then retighten the plug. Allow the machine to idle at low RPM with no load for 10 to 15 minutes to purge any remaining air from the system.

Fluid & System Decontamination
If replacing a pump that suffered internal mechanical failure, completely drain and clean the hydraulic oil reservoir, flush all circuit lines, and clean the oil cooler. Always replace return and suction filter elements prior to initial engine startup.

Pressure Regulator & Relief Valve Verification
Verify that system main relief pressures match factory Bobcat specifications upon initial testing. Improper relief valve settings can cause sluggish implement speed, circuit overheating, or engine stalling under load.

4. Frequently Asked Questions (FAQ)
Q: Are Bobcat part numbers 7209325 and 7209326 fully interchangeable?
A: Yes. These part numbers represent standard Bobcat factory revisions, supersessions, and catalog updates across the E25, E26, and E27Z model ranges. Both cross-reference directly to the Nachi PVD-0B-24P platform and share identical physical mounting dimensions, input shaft splines, and hydraulic port locations.

Q: My Bobcat E26 stalls the engine or loses speed when performing combined boom and travel functions. Is the main pump failing?
A: Engine lugging or loss of speed under load usually indicates worn internal dynamic groups or sticking load-sensing pump regulators failing to destroke fluid output when pressure spikes occur. Replacing the main pump assembly restores balanced engine-to-hydraulic power delivery.

Q: Does this unit arrive complete with the rear gear pump section attached?
A: Yes. The unit arrives complete as a single integrated pump assembly, including the main axial piston pump section, factory-calibrated 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.