Engine Parts/Crankshaft and Gear Train

Products & Range Coverage
A&S MACHINERY CO., LTD. delivers an extensive inventory of specialized rotating power systems and internal transmission components to support diverse heavy-duty equipment (e.g., CAT 770/775/777 mining trucks, 336/349 excavators, 980 loaders, and D6/D8 dozers):
• Machine & Engine Series Compatibility: Engineered for a broad range of Caterpillar equipment series and heavy-duty diesel engines (covering inline six-cylinder and V-engine layouts), our parts ensure exact stroke lengths, main/connecting rod journal diameters, fillet radii, counterweight phases, and timing gear installation hole positions with original engine blocks to guarantee a 100% perfect match for lossless alignment and factory-grade dynamic balance.
• Complete Crankshaft & Gear Train Components: 1. Heavy-Duty Forged Crankshafts: High-purity alloy steel units processed through mold forging, deep induction hardening, and precision dynamic balancing; 2. Crankshaft Vibration Dampeners: Silicone fluid dampeners and rubber damping pulleys engineered to absorb high-frequency torsional vibrations and prevent fatigue fractures; 3. Main & Connecting Rod Bearings: Multi-layer composite metal bearings offering superior anti-spalling, anti-embedment, and high-load capacity; 4. Timing & Gear Train Assemblies: Crankshaft timing gears, idlers, camshaft gears, and fuel pump drive gears manufactured from high-strength alloy steel via carburizing and quenching.
• OEM & Heavy-Duty Aftermarket: We offer certified original equipment manufacturer Caterpillar crankshaft and gear train components alongside rigorously tested heavy-duty aftermarket parts verified through severe mining high-load bench fatigue tests, delivering exceptional operational reliability and extended service lifespan at a cost-effective price point for global clients.

Supply Chain & Logistics
We maintain a robust operational infrastructure designed to support global machinery ultra-heavy precision forging procurement through direct supply channels, delivering reliable stock availability and rapid dispatch to build trust with international buyers.
• Massive Inventory and Part Cross-Reference: We maintain large-volume stock of tens of differing specifications of CAT mainstream heavy engine crankshaft assemblies, bearing overhaul kits, and various timing gears. Backed by barcode-enabled intelligent warehousing and heavy machinery parts databases, we guarantee precise matching and direct dispatch upon order confirmation to minimize equipment downtime caused by engine overhaul crankshaft damage forcing machinery stoppages.
• VCI Anti-Rust and Heavy-Duty Crated Packaging: We implement specialized industrial packaging standards for hundreds of kilograms of heavy crankshafts where journals must remain entirely free of impacts, utilizing volatile corrosion inhibitor anti-rust oil film coating, full-length vacuum plastic sealing, multiple high-density molded foam slot suspension fixtures, and specialized thickened steel-band-reinforced fumigated solid wood export heavy-duty crates equipped with dedicated hoisting lift points to ensure parts do not suffer axial deformation, corrosion, or collision damage during transcontinental ocean or air transit.
• Consolidated Sourcing: We support overseas clients by consolidating crankshafts, main bearings, dampeners, and timing gears alongside matching heavy engine block overhaul kits, connecting rods, or liners into precise bundled shipments, maximizing container space utilization and significantly reducing international freight costs for overseas repair facilities.

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.
• Application-Specific Durability Solutions: We address common field issues in extreme working environments, such as open-pit quarries running under continuous high-intensity full loads with improper oil maintenance, where standard crankshaft journals experience rapid wear and dampener rubber experiences high-temperature aging failure. We also provide professional engineering upgrades, including deep-nitrided strengthened wear-resistant journals, high-fatigue-resistance alloy forged steel, and military-grade silicone fluid dampeners.
• Troubleshooting and Maintenance Guidelines: We address common user concerns regarding internal heavy metallic knocking noises, sudden lubricating oil pressure drops, crankcase breather white smoke, or crankshaft fracture by providing professional diagnostic and replacement guidance. This includes using micrometers and Plastigage to precisely measure main journal-to-bearing clearance, crankshaft axial play, and radial runout to ensure compliance with Caterpillar specifications, alongside emphasizing the necessity of inspecting crankshaft dampener housing temperatures and rubber or silicone status during overhauls to strictly prevent using failed dampeners that cause new crankshafts to fracture again.
• Expert Technical Support and Safety Guidelines: We provide technical documentation covering Caterpillar crankshaft main bearing cap bolt step-angle tightening torque standards, timing gear alignment diagram instructions, and cleanliness control specifications, assisting overseas technical personnel in maintaining standardized installations.

Call to Action & User Experience
Optimize your engine rotational reliability and power transmission performance 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 Caterpillar machine model (such as CAT 777G, 336D, or 980H units), engine platforms (such as C15, C18, or 3406), component categories (such as crankshafts, vibration dampeners, main bearings, or timing gears), or original equipment manufacturer part numbers to lock onto target products instantly.
• RFQ and Bulk Engine Overhaul Quotation: Access our fast-response interactive channels providing one-click bill of materials uploads for fleet engine deep overhaul and crankshaft or transmission spare replacement lists to receive bundled assembly quotations and heavy-duty logistics freight estimates, fulfilling workshop overhaul and heavy emergency spare parts reserve procurement requirements for overseas mining sites, fleets, and repair shops.
• Consultation and Support: Utilize our around-the-clock professional technical support channels staffed by senior engine mechanical structure and power transmission experts to assist overseas clients in verifying compatibility for legacy machine non-standard crankshaft dimensions, including 0.25 mm and 0.50 mm undersize repair journals or aftermarket replacement selections, ensuring cross-border procurement runs error-free.