102mm CAT Piston Ring Set 5I-7538 5I7538 262-3066 178-6543 For 3066 S6K Engine Excavator

Core Features 

• [Direct Fit & OEM Dimensions] Precision-machined to exact factory cylinder bore (102mm), groove depths, and ring thickness specifications for seamless drop-in installation.

• [High-Performance Sealing & Compression] Optimized top compression rings, second scraper rings, and oil control rings provide superior gas sealing, reduced blow-by, and excellent oil consumption control.

• [Wear-Resistant Alloy Materials] Manufactured from high-grade alloy cast iron and premium steel with specialized coatings to withstand high combustion temperatures and severe friction.

• [Thermal Stability & Radial Tension] Engineered to maintain consistent radial tension and elasticity under extreme thermal expansion and high-load operating cycles.

• [Pre-Shipment Quality Inspection] Rigorously inspected for gap clearance, tension consistency, and surface finish prior to shipment to ensure zero-defect engine rebuilds.

Product Details (产品详细说明)

• [Direct Fit Replacement] Directly replaces original equipment part numbers 5I-7538 and 5I7538, cross-referenced with 178-6543 and 34317-19010.

• [Engine Compatibility] Specially engineered for CAT and Mitsubishi diesel engines including 3066, 3064, S6K, S6KT, and C6.4 platforms with a 102mm bore size.

• [Wide Equipment Fitment] Compatible with CAT industrial excavators such as 311, 312, 320B, 320C, and related heavy equipment.

• [Restores Compression & Power] Effectively eliminates crankcase blow-by, reduces excessive oil consumption, and restores original engine compression and power output during overhauls.