Product description
- Product description
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Product Overview
This full set hydraulic motor core spare parts kit covers all critical internal wear components of variable bent axis hydraulic travel motors, categorized as universal hydraulic parts for heavy-duty construction, mining and road compaction machinery. The full hydraulic parts assembly includes splined drive shaft, cylinder block barrel, piston slipper assemblies, swash plate, retainer plate, valve plate, friction copper plate, snap ring and inner splined hub. Every hydraulic part adopts high-precision CNC machining and heat treatment process, unified standard interchange dimensions matching mainstream bent axis hydraulic motor series. This full hydraulic repair kit eliminates the trouble of purchasing scattered single hydraulic spare parts separately, shortens equipment overhaul cycle, cuts maintenance downtime and labor service cost for machinery repair workshops, hydraulic overhaul service centers, construction equipment rental firms and cross-border hydraulic parts distributors worldwide.This full set hydraulic parts kit resolves all common hydraulic motor failure issues caused by worn internal hydraulic components: weak starting torque, slow traveling speed, heavy internal oil leakage, abnormal knocking vibration, overheating, loud running noise and actuator drift under heavy load holding. All hydraulic parts inside the kit are manufactured to original OEM tolerance standard, guaranteeing stable consistent hydraulic performance after full motor rebuild.Core Hydraulic Parts & Technical Specifications
- Splined Drive Shaft: Medium-large heavy-duty spline shaft, alloy steel full quenching hardening, surface precision grinding anti-wear treatment, standard spline tooth count for interchangeable hydraulic motors
- Cylinder Block Barrel: High-strength cast alloy cylinder housing, precision machined piston bores, internal spline hub integrated forming, pressure-resistant high load bearing
- Piston Slipper Assembly: Copper alloy wear-resistant slipper + solid steel piston, anti-abrasion surface coating, 9pcs full set per kit matched to 9-cylinder motor configuration
- Swash Plate (Yoke): Forged alloy steel bent axis swash frame, high rigidity anti-deformation, precision curved contact surface to reduce friction loss
- Retainer Plate / Separator Plate: High-toughness alloy steel retainer to lock piston slippers during variable displacement operation
- Valve Plate: Dual-sided precision ground steel distribution plate, ultra-flat finish to minimize internal bypass leakage
- Copper Friction Plate: Soft copper buffer plate for pressure shock absorption and noise reduction
- Snap Retaining Ring: Spring steel anti-fatigue snap ring for internal assembly positioning
- Universal Compatibility: Fits most medium & large variable bent axis hydraulic travel motors used on road rollers, compact track loaders, underground mining haulers, asphalt pavers
- Material Standard for All Hydraulic Parts: Alloy structural steel, wear-resistant copper alloy, spring steel; Full high-temperature quenching + tempering heat treatment
- Processing Precision: All hydraulic core parts tolerance controlled within OEM standard, surface roughness Ra ≤ 0.8μm
- Working Pressure Matching: Rated up to 350bar, peak intermittent pressure 410bar, compatible with heavy closed-loop hydraulic motor circuits
Material & Performance Advantages of These Hydraulic Parts
- Complete one-stop hydraulic parts combination: All wear-prone internal hydraulic spare parts integrated into one kit, no need to source multiple separate hydraulic parts suppliers, drastically saving procurement time and overhaul scheduling.
- Strict OEM equivalent precision manufacturing: Every hydraulic part undergoes multi-step CNC grinding and heat treatment, long service life under continuous high-pressure heavy-load circulation.
- Low leakage design matching: Ultra-flat valve plate and copper alloy piston slippers effectively reduce internal bypass leakage, restore original motor torque and traveling speed after repair.
- High rigidity anti-deformation hydraulic components: Forged swash plate and thickened cylinder block avoid permanent deformation under steep hill climbing overload, eliminating abnormal vibration and knocking noise.
- Wide universal interchangeability: This full hydraulic parts repair kit fits mainstream medium-large bent axis hydraulic motor series for compaction, mining and earthmoving machinery, strong versatility for multi-brand equipment maintenance.
- Standard unified packaging of hydraulic parts: Each hydraulic component is separately protected against collision and rust during transit, complete part marking for quick identification during disassembly & assembly.
Application Scenarios
Applicable Equipment for This Set of Hydraulic Parts
- Road construction machinery: Heavy single/double drum road rollers, full-width soil stabilizers, asphalt pavers, cold recycling machines
- Underground mining machinery: Medium-large mine ore haulage vehicles, quarry heavy material loaders, rock crushing hydraulic systems
- Compact heavy earthmoving machinery: Large compact track loaders, heavy skid steer loaders, medium-large backhoe excavators
- Industrial heavy hydraulic equipment: Large tonnage hydraulic presses, material lifting heavy loaders, port bulk cargo transfer carriers
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This is a complete hydraulic piston pump spare parts kit, consisting of drive shaft, cylinder block, pistons, swash plate, valve plate, retainer plate and related fittings. These wear parts are used to repair axial piston pumps of engineering machinery. They replace damaged internal components, restore pump pressure and flow output, reduce equipment maintenance cost and extend hydraulic system service life. Suitable for various excavator, loader and industrial hydraulic pump models.
Product Overview
The parts shown in the picture are complete internal overhaul spare parts for axial piston hydraulic pumps / hydraulic motors, widely used in construction machinery (excavators, loaders), agricultural machinery and industrial hydraulic equipment.This full kit includes all core wearing components of a piston pump assembly:- Main Drive Shaft
- The power input shaft with splines, transfers mechanical torque from the engine to the pump internal rotating assembly, driving the piston group to reciprocate.
- Cylinder Block (Rotating Barrel)
- The core rotating carrier with multiple cylindrical bores to hold pistons; internal splines connect with the drive shaft, distributing high-pressure hydraulic oil flow.
- Piston Assemblies (Brass-coated Pistons)
- Plunger pistons with brass sliding heads. Their back-and-forth motion inside the cylinder block creates oil suction and pressure output, converting mechanical power into hydraulic energy.
- Swash Plate (Cam Rocker)
- The inclined sliding plate that controls the stroke length of pistons. Adjusting its tilt angle changes pump displacement and output flow rate.
- Valve Plate (Copper Port Plate)
- A precision copper sealing plate mounted between the cylinder block and pump housing. It separates the oil inlet and outlet ports, realizing continuous oil suction & discharge as the cylinder rotates.
- Retainer Plate / Piston Slipper Hold Plate
- Circular steel plate with holes, locks all piston slippers tightly against the swash plate to maintain stable sliding contact during operation.
- Splined Hub / Guide Ring & Retaining Clips
- Small auxiliary parts for positioning, limiting and anti-loosening of rotating components to prevent assembly dislocation at high pressure.
Core Function & Application
- Repair & Replacement Purpose
- All these are consumable wearing parts inside piston pumps. Long-term high-pressure work causes abrasion, scratches, leakage or power loss. Replacing this full kit restores the pump’s original performance, avoiding expensive whole pump replacement.
- Hydraulic Energy Conversion Principle
- When the drive shaft spins the cylinder block, pistons slide along the inclined swash plate, moving back and forth inside cylinder bores:
- Retraction stroke: Draw low-pressure hydraulic fluid from the tank
- Extension stroke: Compress oil to generate high pressure for driving hydraulic cylinders and motors
- Industry Value
- These overhaul kits lower equipment maintenance costs, shorten machine downtime, and ensure stable hydraulic output for heavy machinery including excavators, concrete mixers, hydraulic presses and road rollers.
- Performance Advantages of Matching Parts
- Manufactured with high-strength alloy steel and wear-resistant brass lining, featuring high pressure resistance, low friction and long service life. Precise dimensional tolerance eliminates internal oil leakage and recovers pump flow, pressure and lifting power completely after overhaul.
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
Core components of plunger pump (drive shaft, cylinder body, plunger, distribution plate, thrust washer)
Still have questions? Please get a sample first.Contact us!
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Zhibo Science and Technology Park, Baoding City, Hebei Province, China