Product description
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Product Overview
This complete A4VG71 hydraulic pump overhaul kit is a full set of matched core hydraulic parts for variable axial piston main pumps, marked and packed under unified Hydraulic Parts specification. The full hydraulic parts assembly includes cylinder block assembly, piston slipper assemblies, valve plate, retainer plate, ball guide, splined hub, full seal kit and swash plate yoke, all precisely sized for A4VG71 series hydraulic pumps. Every hydraulic part inside the kit adopts CNC precision machining + full quenching temper heat treatment, fully interchangeable with OEM original pump spare parts. This integrated hydraulic parts repair pack eliminates scattered separate sourcing of single hydraulic components, shortens pump overhaul downtime, cuts maintenance labor cost for excavator repair shops, hydraulic service centers, construction machinery rental firms and cross-border hydraulic parts distributors worldwide.This set of Hydraulic Parts solves all typical pump malfunctions caused by worn internal hydraulic components: insufficient pump output flow, weak digging power, heavy internal cross leakage, unstable system pressure, abnormal rattling vibration, high operating temperature and slow cylinder movement under load. All hydraulic parts follow original OEM dimensional tolerance standards to restore pump rated flow and pressure after full rebuild.Core Hydraulic Parts & Technical Parameters
- Matching Model: A4VG71 variable axial piston hydraulic pump
- Complete Hydraulic Parts List in Kit:
- Cylinder block assembly (1pc)
- Piston slipper assemblies (9pcs full set)
- Valve plate / distribution plate (1pc)
- Retainer plate / separator plate (1pc)
- Ball guide assembly (1pc)
- Inner splined hub (1pc)
- Full multi-layer rubber seal kit (1set)
- Swash plate yoke (1pc)
- Material Standard for All Hydraulic Parts:
- Cylinder block: High-strength alloy cast steel
- Piston slipper: Wear-resistant copper alloy + solid alloy steel piston
- Valve plate: Double-sided precision ground alloy steel
- Swash plate: Forged high-rigidity alloy steel
- Seals: High-temperature resistant NBR composite rubber
- Processing Precision: All hydraulic core parts controlled within OEM tolerance, surface roughness Ra ≤ 0.8μm
- Rated Working Pressure Matching: 350bar continuous working pressure, 420bar peak intermittent pressure
- Displacement Compatibility: Matches 71cc/rev A4VG71 pump displacement
- Heat Treatment Process: Full overall high-temperature quenching + stress relief tempering to improve abrasion resistance and anti-deformation performance
- Packaging Specification: Each hydraulic part individually packed with labeled yellow Hydraulic Parts cartons and bubble anti-collision bags, clear model marking for quick identification
Material & Performance Advantages of These Hydraulic Parts
- One-stop complete matched Hydraulic Parts kit for A4VG71 pump: All wear-prone internal hydraulic components integrated in one package, no multiple suppliers needed, greatly saving procurement lead time and overhaul scheduling.
- OEM equivalent precision manufacturing: Every hydraulic part undergoes multi-step grinding and heat treatment, long service life under 24-hour continuous high-pressure heavy-load construction cycles.
- Low internal leakage optimized design: Ultra-flat mirror finish valve plate and copper alloy piston slippers minimize bypass oil leakage, fully recover original pump flow output and digging force after maintenance.
- High rigidity anti-deformation hydraulic components: Forged swash plate and thick wall cylinder block resist permanent distortion under heavy excavation overload, eliminating abnormal knocking and vibration noise.
- Exclusive matching for A4VG71 series pumps: Strict dimensional calibration for perfect assembly fit, no modification required during pump repair, direct plug-and-play replacement.
- Independent classified packaging of each Hydraulic Part: Anti-rust, shockproof separate packaging avoids damage during sea or land transportation; clear model labels prevent mixing different hydraulic spare parts.
Application Scenarios
Main Applicable Construction Machinery
- Medium crawler excavators fitted with A4VG71 main pump: 6-12 ton medium digging excavators, road maintenance excavators, municipal engineering excavators
- Heavy compact track loaders with A4VG71 hydraulic system
- Road construction equipment: Medium asphalt pavers, small soil stabilizers, cold recycling machines
- Agricultural heavy machinery: Large self-propelled combine harvesters, heavy tractors with hydraulic drive systems
Company Profile
Winners Hydraulic specializes in supplying high-performance imported hydraulic equipment, including pumps, motors, reducers, and complete excavator hydraulic systems. Our products are engineered for excellence and reliability, serving as critical components across diverse industrial, agricultural, and marine applications.
In heavy industries, our hydraulic solutions act as the "power heart" for construction and mining machinery—ensuring efficiency, stability, and productivity on demanding job sites. In agriculture, they serve as the "mechanical hands" driving modernization, supporting precision and sustainability in farming operations. For the marine sector, our systems deliver the precise control and dependable power transmission essential for safe and stable vessel performance.
Exhibition
Product Customization
OEM/ODM
We have a professional design team that can provide comprehensive services from design to production.
Non-standard customization
We have a professional design team that can provide comprehensive services from design to production.
FAQ
What is the shelf life of your products
One year
What payment method do you support?
TT, paypal, Western Union
Yes, it depends on the quantity
Sea, air, train, truck, express, at the buyer's discretion.
Do you support custom logos and packaging?
Yes, it depends on the quantity
How long can you send your product?
Depending on the model and quantity, we have some popular models in stock
Do you support providing samples before placing an order?
Yes, of course we do
Piston pump motor maintenance kit assembly (including complete set of spare parts and sealing repair kit)
Still have questions? Please get a sample first.Contact us!
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One-stop hydraulic solutions provider, specializing in high-end imported pumps, motors & reducers, backed by expert technical services, serving heavy industries.
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Zhibo Science and Technology Park, Baoding City, Hebei Province, China