Engine Parts/Kits

Products & Range Coverage
A&S MACHINERY CO., LTD. delivers an extensive inventory of specialized kits within our engine parts catalog to support diverse heavy-duty equipment:
• Machine & Engine Series Compatibility: Engineered for a broad range of Komatsu heavy-duty engines, our parts ensure exact dimensional tolerances across standard and oversize configurations for a 100% perfect match and factory-grade power restoration.
• Complete Engine Kits Range: 1. Overhaul Gasket Kits: Complete overhaul and sealing kits integrating cylinder head gaskets, full vehicle oil seals, high-temperature O-rings, and paper/graphite sealing gaskets into convenient one-stop kits; 2. Piston & Liner Assemblies: Comprehensive kits containing high-strength alloy cast iron wet liners, wear-resistant reinforced pistons, piston rings, piston pins, and snap rings; 3. Main & Connecting Rod Bearing Kits: High-wear-resistant bearings manufactured from triple-layer aluminum-tin or copper-lead alloy electroplating, providing exceptional embeddability and anti-fatigue peeling performance; 4. Valve Train Overhaul Kits: Complete component sets comprising intake and exhaust valves, valve guides, valve seats, and valve stem seals.
• OEM & Heavy-Duty Aftermarket: We offer certified original equipment manufacturer Komatsu repair kits alongside rigorous bench-tested aftermarket parts, delivering exceptional 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 kit 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 BOM Verification: We maintain large-volume stock of hundreds of differing specifications of Komatsu mainstream heavy-duty engine overhaul kits, piston liner kits, and bearing sets. Backed by barcode-enabled intelligent warehousing and Komatsu parts databases, we guarantee precise matching and complete-set dispatch upon order confirmation to minimize jobsite downtime caused by incomplete overhaul components.
• Compartmentalized Packaging and Crated Protection: We implement specialized industrial packaging standards for combination kits containing dozens of differently sized components from heavy metal liners and pistons to fragile paper gaskets and precision rubber O-rings vulnerable to transit damage, utilizing high-strength multi-layer honeycomb corrugated cartons or fumigated solid wood export heavy-duty crates featuring customized molded foam and independent compartment slotting to strictly isolate pistons, liners, bearings, and thin gaskets, ensuring components do not suffer impact scratches, moisture corrosion, or missing parts during transcontinental ocean or air transit.
• Consolidated Sourcing: We support overseas clients by consolidating engine overhaul kits alongside matching oil pumps, water pumps, turbochargers, and coolants into precise bundled shipments, maximizing container space utilization and significantly reducing international freight costs for overseas machine maintenance 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 for power unit overhaul assets.
• Application-Specific Durability Solutions: We address common field issues in extreme jobsite environments, such as open-pit quarries involving continuous heavy loading or high-heat dusty mines where standard factory piston rings suffer short lifespans and liners experience early cavitation wear. We also provide professional engineering upgrades, including high-pressure anti-cavitation reinforced cylinder liners and diamond-like carbon coated wear-resistant piston ring combination kits.
• Troubleshooting and Maintenance Guidelines: We address common user concerns regarding Komatsu excavator excessive blow-by after overhaul, low oil pressure, or early melting of new bearing shells by providing professional diagnostic and replacement guidance. This includes emphasizing the mandatory requirement to use dial indicators to measure wet liner projection height above the block upper surface within a precise range of 0.05 mm to 0.10 mm with minimal height variance across cylinders to prevent head gasket blowout, alongside instructing technicians to use plastigage to verify oil film clearance on main and connecting rod bearings rather than assembling blindly.
• Expert Technical Support and Safety Guidelines: We provide technical documentation covering Komatsu engine overhaul torque diagrams including staged torque plus angle tightening methods for cylinder head and connecting rod bolts, piston ring end-gap staggering angles, and break-in operating procedures, assisting overseas technical personnel in maintaining standardized installations.

Call to Action & User Experience
Optimize your machinery overhaul reliability and power restoration 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 Komatsu machine model (such as PC200-8, PC360-7, or WA380), engine platforms (such as 6D102 or SAA6D107), component categories (such as full overhaul kits, piston liner kits, bearing kits, or gasket kits), or original equipment manufacturer part numbers to lock onto target products instantly.
• RFQ and Engine Kit Quotation: Access our fast-response interactive channels providing one-click bill of materials uploads for fleet Komatsu machinery engine overhaul spare replacement lists to receive bundled assembly quotations and international logistics freight estimates, fulfilling workshop deep maintenance and emergency spare parts reserve procurement requirements.
• Consultation and Support: Utilize our around-the-clock professional technical support channels staffed by senior Komatsu machinery engine overhaul experts to assist overseas clients in verifying compatibility for legacy non-standard repair sizes, kit version compatibility, and overhaul auxiliary material matching, ensuring cross-border procurement runs error-free.