Anti Burst STD Piston Ring 34317-07100 For Mitsubishi S6KT Excavator Diesel

Product Specification

Anti-Burst & High Temperature Resistant STD Piston 34317-07100 for Mitsubishi S6KT Excavator Diesel Enginediesel engine parts

This piston 34317-07100 is designed for Mitsubishi S6KT (CAT 3066) diesel engine, serving as the core replacement spare part for overhaul of CAT E320C, E320D excavators. It follows OEM tolerance standard and fits S6KT engine perfectly. As the critical pressure-bearing component in combustion chamber, piston withstands explosion impact, peak temperature and high-frequency reciprocating friction. This piston is optimized in five core dimensions: raw material, casting, precision machining, surface protection and quality inspection, to suit long-time heavy-load operation on mine and earthwork sites.

Feature 1: High-silicon aluminum alloy, thermal deformation resistance & impact endurance Refined eutectic high-silicon aluminum blank is adopted with evenly distributed silicon grains, low thermal expansion coefficient and excellent thermal fatigue resistance. When excavator works under continuous full load with dramatic cylinder temperature change, thermal expansion is well controlled. It resists out-of-round deformation, cylinder scuffing and seizure, perfect for harsh mine and earthmoving conditions.

Feature 2: Integral deep bowl chamber for sufficient fuel atomization & combustion The integrally cast deep bowl copies OEM contour and matches injector spray angle precisely. It ensures uniform fuel mixing, stable compression pressure and consistent power output, effectively solving common post-overhaul issues such as heavy black smoke, high fuel consumption and weak power.

Feature 3: Full CNC precision machining with tight tolerance for grooves & pin bore Ring grooves, pin bore and piston skirt are all CNC machined. Flatness of ring grooves and concentricity of pin holes are strictly controlled. Well-fitted piston rings deliver reliable sealing, prevent gas blow-by and oil consumption, and guarantee stable idle and quick throttle response after overhaul.

Feature 4: Skirt graphite coating to prevent dry wear during break-in Dry graphite lubricant coating is applied on piston skirt. It forms a solid lubricating film on cold start and early break-in before full oil film builds up, avoiding direct metal contact and cylinder scoring. It improves the first-time overhaul success rate for mechanics.

Feature 5: Penetrant inspection & dimension sampling test for traceable quality All castings go through penetrant testing to detect hidden sand holes, pores and internal casting cracks. Defective blanks are rejected before processing. Finished pistons are sampled for full dimension inspection. Low return rate makes it ideal for bulk export stock and excavator repair shop inventory.

We supply single pistons separately or full overhaul kits including wrist pin, circlips and piston rings. Ready stock available for regular S6KT / CAT3066 engine maintenance.