6207-21-2210 Cylinder liner ID=95MM B3.3 semi finished For Engine 6D95 4D95

6207-21-2210 Cylinder Liner for Komatsu 4D95 / 6D95 Engine

This premium 6207-21-2210 cylinder liner (cylinder sleeve) is a direct-fit replacement component designed for Komatsu 95 series diesel engine overhauls. Precision-machined from high-density cast iron alloy, it features exceptional wear resistance and optimized thermal dissipation, ensuring long-lasting ring-to-wall sealing under severe hydraulic load.

Technical Specifications & Dimensions

Application-Specific Notes for Komatsu 95 Series

The 6207-21-2210 dry liner is a thin-wall sleeve that relies heavily on a perfect interference fit with the engine block cylinder bores. Because early Komatsu PC60-5 / PC120-5 and later PC120-6 excavators utilize varying thermal configurations of the 4D95 and 6D95 blocks, always ensure the engine block block bore is accurately measured and cleaned before pressing the new sleeve.

To guarantee uniform compression across all combustion chambers, we strongly advise against single-sleeve replacements. Complete engine liner sets combined with matching standard pistons and rings should be deployed during an official engine block rebuild.

Signs That Your 4D95 / 6D95 Liner Requires Maintenance

Vertical Scoring Marks: Deep scratches on the inner wall surface indicating lubrication film failure or carbon particle intrusion.

High Blow-By Pressure: Cylinder ovality allows combustion gas to escape past the piston rings into the crankcase, causing power drops and black smoke.

Glazed Inner Surface: A mirror-like finish that prevents engine oil from adhering properly, triggering premature piston ring wear.

Secure an Accurate Technical Quote Within 24 Hours

For immediate fitment verification, please submit your Komatsu Engine Serial Number (ESN) or your excavator chassis serial number. Our heavy equipment specialists will cross-reference the official Komatsu parts book database to ensure the 6207-21-2210 matches your specific fleet application perfectly.

FAQ

Is the 6207-21-2210 a finished or semi-finished liner?

This component is a fully-finished (pre-honed) dry cylinder liner. It is pre-sized to standard factory measurements and is ready for direct installation without requiring extra boring or honing post-pressing.

Are 6207-21-2110 and 6207-21-2210 completely interchangeable?

Yes. 6207-21-2110, 6207-21-2111, and 6207-21-2210 share identical dimensional properties (95mm Bore x 98mm OD x 180mm Length) according to Komatsu OEM parts records and can be utilized interchangeably in the 95 series engines.