17A-09-41170 Crankshaft Main Bearing for Komatsu D155AX-6 D275A

Crankshaft Main Bearing 17A-09-41170 for Komatsu Bulldozer The 1697827 and 1437983 hydraulic cylinder seal kits are high-grade fluid power reconstruction assemblies engineered for heavy-duty construction and mining machinery. Designed to restore optimal sealing pressure within demanding hydraulic cylinders, these kits prevent fluid bypass, eliminate external oil leaks, and protect internal components from abrasive job site dust and moisture. Manufactured from premium polyurethane, nitrile rubber, and fluorocarbon materials, these seals offer exceptional wear resistance, thermal stability, and low-friction performance under continuous high-pressure operations. The 17A-09-41170 crankshaft main bearing is a high-precision, heavy-duty engine component engineered specifically for large-displacement industrial diesel engines. Positioned within the engine block journals, this main bearing supports the crankshaft, reduces rotational friction, and absorbs the immense combustion forces generated during intense heavy equipment operations. Manufactured with premium multi-layer bimetal or tri-metal alloys, it delivers exceptional load-carrying capacity, high thermal conductivity, and superior wear resistance under continuous peak loads. Product Specifications Precision-manufactured to strict dimensional and clearance tolerances to ensure optimal hydrodynamic lubrication films and immediate powertrain integration. Part Number: 17A-09-41170 Alternative Format: 17A0941170 Product Class: Heavy Machinery Engine Internal Spare Parts Component Type: Crankshaft Main Journal Bearing Set / Plain Bearing Material Composition: Copper-Lead / Aluminum-Tin Tri-Metal Alloy with Steel Backing Cross-Reference & System Placement This engine bearing corresponds to exact original equipment structural clearances and is built for specific placement within core block layouts: Interchangeable References: 17A-09-41170, 17A0941170 System Association: Engine Crankshaft Group / Cylinder Block Main Journal Assembly Primary Function: Provides a low-friction, high-durability surface to support the engine crankshaft, maintaining radial alignment during heavy torque generation. Application and Machinery Compatibility Accurately dimensioned to match the engine configurations of the following Komatsu heavy crawler tractors and mining dozers: Compatible Komatsu Bulldozer Models D155AX-6 Series (Equipped with SAA6D140E Engine) D275A-5 Series (Equipped with SAA6D140E Engine variants) D275A-5D / D275A-5R Series Associated Engine Series Komatsu 140-6 Series Diesel Engines (6D140 / SAA6D140E-5 / SAA6D140E-6) Installation and Engine Overhaul Guidelines Technical Recommendation: Main bearing replacement requires absolute cleanliness and strict adherence to torque parameters. Prior to installing the 17A-09-41170 main bearing inserts, thoroughly clean the engine block journals and bearing caps to remove any oil glaze or particulate contamination. Always measure oil clearances using precision gauging plastic before final assembly, and lubricate the bearing faces with clean engine assembly oil to prevent dry scuffing during initial engine startup. 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