Nachi PVD-1B-24P-11AG-4754G 20/950921 hydraulic pump for JCB 8027 8032 ZTS 8027Z 8032Z mini excavator
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Ukraine, Kalush
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Pump Model: Nachi PVD-1B-24P-11AG-4754G
OEM Part Number: 20/95show contacts)
Machine Compatibility:
JCB 8027
JCB 8032 ZTS (Zero Tail Swing)
JCB 8027Z
JCB 8032Z
Condition: OEM Brand New / Original Nachi
2. Technical Specifications
Type: Dual Variable Displacement Axial Piston Pump + Integrated Gear Pump
Architecture: Split-flow piston design that delivers independent, simultaneous oil flow to the travel, boom, and arm circuits, preventing function drop.
System Parameters: Factory-calibrated to match the precise flow and relief valve settings of the JCB mini excavator control block.
Structural Build: Compact casing designed to fit high-output dual-piston groups within a confined engine bay configuration.
3. Critical Installation Requirements
Case Priming (Mandatory)
Before starting the engine for the first time, you must manually fill the pump housing with clean hydraulic oil through the highest case drain port. Running a Nachi PVD piston pump dry for even 5 seconds will scratch the valve plate and destroy the piston shoes.
Complete Hydraulic Decontamination
If the previous pump failed mechanically (sending brass or steel particles into the system), the entire hydraulic loop must be cleaned. Thoroughly drain and clean the hydraulic tank, flush the main control valve bank, and clean the oil cooler lines.
Replace All Filtration Elements
Always install a brand-new suction strainer, pilot filter, and high-pressure return filter element. Refill the system with fresh, clean ISO VG46 or factory-recommended anti-wear hydraulic oil.
Air Bleeding Procedure
Upon initial startup, let the engine run at a low idle speed for 10 minutes. Slowly cycle all cylinder functions (boom, arm, bucket, track travel) to their full travel limits without load to purge any trapped air back into the reservoir.
4. Frequently Asked Questions (FAQ)
Q: Are the PVD-1B-24P pumps for the JCB 8027 and 8032 fully interchangeable?
A: Yes, these models share the same hydraulic platform and use the exact same Nachi PVD-1B-24P series pump assembly under JCB part number 20/950921. Always verify your machine serial number before purchase to confirm port fitting types.
Q: My mini excavator tracks straight but has very weak boom and bucket power. Is the pump bad?
A: It is a strong possibility. The PVD-1B pump has multiple independent flow sections. One piston section can wear out internally (causing high oil bypass) while the other sections still function well enough to drive the tracks. Run a pressure test at the control valve block to isolate the problem.
Q: Does the pump come with the regulatory valves pre-installed?
A: Yes, our OEM Brand New Nachi pumps are shipped as complete assemblies, including the pre-set pressure regulators and control valves calibrated directly at the factory.
5. Shipping & Logistics
Packaging: Thoroughly preserved with anti-corrosion oil, sealed with protective heavy-duty port plugs, and secured inside a reinforced export shipping box.
Transit Time: Global express air freight via DHL/FedEx/UPS typically delivers within 3 to 7 business days directly to your address.