Hydraulic Parts/Swivel Joint

Products & Range Coverage
A&S MACHINERY CO., LTD. delivers an extensive inventory of specialized swivel joints within our hydraulic parts catalog to support diverse heavy-duty equipment. Our product lineup covers a broad range of machine series and hydraulic fluid management specifications, ensuring that every component meets rigorous Komatsu standards for rotary power transmission and leakage prevention:
• Machine & Swivel Joint Application Compatibility: Engineered for a broad range of Komatsu heavy-duty excavators and loaders, our parts ensure exact port counts, pressure ratings, and bolt interface dimensions for a 100% perfect match, rapid installation, and factory-grade hydraulic performance.
• Complete Heavy-Duty Swivel Joint Range: 1. Swivel Joint Assemblies: Designed specifically for high-intensity frequent rotation operations utilizing precision chrome-plated and ground internal oil passages; 2. Core Mandrels & Housings: Manufactured from high-strength alloy steel forgings subjected to deep quenching treatments for superior wear resistance; 3. High-Pressure Rotary Seal Kits: Containing imported polyurethane and Teflon composite step seals, glyd rings, and dust wipers engineered to eliminate internal fluid crossover.
• OEM & Heavy-Duty Aftermarket: We offer certified original equipment manufacturer Komatsu swivel joint assemblies alongside rigorous bench-tested aftermarket heavy-duty parts completing rotational fatigue and high-pressure impulse testing with sealing lifespans exceeding industry benchmarks, delivering exceptional operational reliability and extended service lifespan at a cost-effective procurement point for global clients.

Supply Chain & Logistics
We maintain a robust operational infrastructure designed to support global swivel joint procurement through direct supply channels, delivering reliable stock availability and rapid dispatch to build trust with international equipment owners and repair facilities.
• Massive Inventory and Cross-Reference: We maintain large-volume stock of hundreds of differing specifications of swivel joint assemblies and overhaul seal kits for Komatsu mainstream heavy-duty machines across every series. Backed by barcode-enabled intelligent warehousing and Komatsu cross-reference databases, we guarantee precise matching and immediate dispatch upon order confirmation to fulfill routine maintenance and rapid replacement needs for overseas fleet workshops and minimize equipment downtime caused by internal fluid crossover leading to operational paralysis.
• Port Sealing and Heavy-Duty Crated Protection: We implement specialized industrial packaging standards for swivel joint products featuring moderate overall weight combined with precision-matched cylindrical mating components that are highly vulnerable to external port thread deformation, internal mandrel scratching, or rubber seal aging during transcontinental transport, utilizing pressure-resistant threaded flange covers and specialized dust plugs to seal dozens of inlet and outlet ports tightly against salt spray and dust ingress, while the assembly is fully encapsulated and suspension-fixed inside high-density custom EPE molded packaging, secured within heavy-duty export fumigated wooden crates to completely eliminate impact damage during cross-border ocean logistics.
• Consolidated Sourcing for Slewing Overhaul Kits: We support overseas clients by consolidating swivel joints alongside matching components, such as slewing reduction gear oils and complete upper and lower hydraulic hose sets, into precise bundled full-set slewing and undercarriage kits, achieving a one-stop purchasing model that pairs slewing system core parts while significantly reducing comprehensive logistics costs for overseas workshops.

Engineering Solutions & Technical Support
Our technical framework focuses on resolving field-level operational challenges to eliminate equipment downtime, moving beyond simple parts distribution to deliver comprehensive engineering and service capabilities for rotary hydraulic asset reliability.
• Application-Specific Durability Solutions: We address common field issues in extreme jobsite environments, such as heavy open-pit quarries and high-frequency 360° rotation operations where standard factory swivel joints suffer internal seal scorching and upper-to-lower oil passage crossover under prolonged high-pressure alternating loads and marginal lubrication. We also provide professional engineering upgrades, including imported high-pressure polytetrafluoroethylene composite sealing rings and mandrels finished with specialized super-finishing and chrome hardening treatments to substantially increase wear resistance and crossover prevention capabilities.
• Troubleshooting and Maintenance Guidelines: We address common user concerns regarding Komatsu excavator travel veering where left and right tracks move at inconsistent speeds, or boom and travel functions interfering with each other during simultaneous operations due to internal high-pressure oil passage crossover within the swivel joint, by providing professional diagnostic and maintenance guidance. This includes emphasizing strict adherence to pipeline cleanliness and alignment protocols requiring technicians to thoroughly label and clean all connecting high-pressure rigid and flexible lines during replacement to ensure ports align precisely without cross-connection errors that destroy hydraulic components instantly, while also enforcing case drain line clearance inspection rules requiring mechanics to verify that the upper frame drain line returning to the oil tank is entirely unobstructed, strictly prohibiting backpressure buildup that would otherwise blow out newly installed rotary oil seals.
• Expert Technical Support and Safety Guidelines: We provide technical documentation covering multi-channel port schematics, assembly torque standards, pipe numbering comparison guides, and internal leakage troubleshooting protocols for Komatsu equipment, assisting overseas technical personnel in maintaining standardized installations.

Call to Action & User Experience
Optimize your machinery rotary hydraulic reliability and overhaul efficiency today by utilizing our interactive tools placed across strategic positions on our platform.
• Multi-Dimensional Intelligent Search and Specification Filtering: Benefit from advanced search functions supporting fast product filtering by Komatsu machine model (such as PC200-8, PC360-7, PC400-8, or WA380), accessory categories (such as complete swivel joint assembly, mandrel, housing, or seal kits), or original equipment manufacturer part numbers to lock onto target products instantly.
• RFQ and Swivel Joint Kit Quotation: Access our fast-response interactive channels providing one-click bill of materials uploads for fleet Komatsu machinery slewing and undercarriage system overhaul procurement lists, including swivel joint, slewing motor, and seal kit combinations, to receive bundled assembly quotations and international logistics freight estimates, fulfilling workshop emergency repairs and large-scale periodic spare parts reserve procurement requirements.
• Consultation and Support: Utilize our around-the-clock professional technical support channels staffed by senior Komatsu machinery hydraulic rotary mechanism and sealing experts to assist overseas clients in verifying compatibility for legacy non-standard channel parameters, alternative model upgrades, and fluid crossover troubleshooting solutions, ensuring cross-border procurement runs error-free.