Attachments/Couplers

Products & Range Coverage
A&S MACHINERY CO., LTD. delivers an extensive inventory of quick coupler systems and bucket connection components, eliminating procurement gaps across global machine fleets:
• Machine Compatibility: Engineered for Caterpillar series ranging from mini excavators to medium/heavy excavators (CAT 320, 330, 336, 345, 374) and wheel loaders, ensuring 100% alignment with original dipper arms and mounting dimensions.
• Complete Coupler & Connection Systems: 1. Quick Coupler Assemblies: Manual quick couplers for economical frequent changes; hydraulic quick couplers for in-cab one-touch high-frequency switching; and proprietary interfaces including pin-grabber styles and wedge-locking designs; 2. Locking & Connection Parts: High-strength locking pins, safety hooks, hydraulic cylinders, solenoid valves, high-pressure hoses, bucket ear bushings, adapter brackets, and conversion cradles.
• OEM & Heavy-Duty Aftermarket: Offering genuine OEM Caterpillar quick couplers alongside rigorously tested aftermarket alternatives manufactured from high-strength alloy forged steels, guaranteeing equivalent locking safety factors and wear life in extreme environments.

Supply Chain & Logistics
We maintain a robust operational infrastructure designed to support global heavy machinery and attachment procurement through direct supply channels, delivering reliable stock availability and rapid dispatch to build trust with international buyers.
• Ready-to-Ship Inventory: We maintain large-volume stock of high-demand quick coupler tonnages, hydraulic cylinders, seal kits, and locking pin assemblies to ensure immediate order processing and rapid dispatch upon confirmation, directly minimizing equipment downtime.
• Global Shipping and Industrial Packaging: Our international logistics framework utilizes efficient air freight courier services, express lines, and ocean shipping to ensure secure and efficient delivery covering core infrastructure and mining markets across North America, South America, the Middle East, Australia, Southeast Asia, and Africa.
• Anti-Corrosion and Anti-Collision Shipping Standards: We implement rigorous industrial packaging standards specifically designed for precision hydraulic quick couplers, utilizing anti-rust sealing and dust protection, alongside steel pallet fixation and fumigation-free wooden crate packaging for heavy structural parts to guarantee that products withstand long-distance ocean transport without damage.

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.
• Safety and Wear Solutions: We address common field issues in aggressive environments where quick couplers experience looseness from wear, locking mechanism jamming, or safety latch failure. We also provide professional engineering solutions including high-strength wear-resistant alloy material upgrades and dual hydraulic or mechanical backup locking structure designs.
• Hitch Compatibility and Conversion Expertise: We solve sizing discrepancies frequently encountered by global buyers when procuring components for older or specialized Caterpillar machine models or mixing different brand buckets with CAT quick couplers, such as mismatched pin center distances, ear widths, or grab hook dimensions, and we provide professional engineering consultations, supporting clients in performing precise one-to-one cross-referencing and non-standard customization based on machine serial numbers and interface dimension drawings.
• Expert Technical Support and Safety Guidelines: We provide professional technical guidance covering quick coupler hydraulic line connections, electrical control signal integration, daily grease lubrication point maintenance, and locking clearance regular checks. Clear warranty and safety compliance policies ensure complete peace of mind for global engineering contractors, equipment rental companies, and parts dealers.

Call to Action & User Experience
Optimize your machine attachment versatility today by utilizing our interactive tools placed across strategic positions on our platform.
• Multi-Dimensional Intelligent Search and Filtering: Benefit from advanced search functions that support fast product filtering by Caterpillar excavator tonnage or model, including CAT 320 or CAT 336, coupler type (such as manual, hydraulic, or pin-grabber), and pin diameter or ear spacing specifications, to lock onto target products instantly.
• RFQ and Proforma Invoice System: Access our fast-response interactive channels providing one-click access to formal quotations, including freight terms (such as CIF or FOB), supported by around-the-clock multi-language online customer service to help global engineering contractors, equipment rental businesses, and parts distributors complete procurement efficiently.