6742-01-5159 3900328 3948095 Cylinder Liner for Komatsu 6D114 Engine

6742-01-5159 / 3900328 / 3948095 Cylinder Liner Sleeve for Komatsu 6D114 & Cummins 6CT Engine

The premium industrial matching 6742-01-5159 cylinder liner is a highly accurate interchangeable wet sleeve engineered to sustain maximum compression loads in high-tonnage construction machinery. Cast from specialized heat-treated centrifugal iron formulas, this common core component provides immense resistance to wall friction and continuous structural fatigue under cyclic thermal demands.

Technical Specifications & Structural Dimensions

Combustion Pressure Challenges in HPCR Common Rail Upgrades

When deploying fleet overhauls for heavy 30-ton mining crawlers like the Komatsu PC300-7 excavator or PC360-7 excavator, understanding the mechanical shift between early mechanical blocks and late high pressure common rail SAA6D114E engines is critical. The electronic common rail injection system introduces much higher peak cylinder firing pressures. This severe downward combustion force reacts directly on the upper flange counterbore seat. Installing our high tensile 3900328 wet liner core ensures structural rigidity under these upgraded pressure spikes, completely eliminating micro-cracking risks near the cylinder head mating interface.

Managing Piston Side Thrust and Sealing Ring Integrity

The massive power output of the 8.3-liter Cummins 6CT engine architecture produces severe secondary piston side thrust during the power stroke. Since wet liners are surrounded by fast flowing engine coolant, this lateral impact creates microscopic sleeve vibration. If the lower block packing grooves are fitted using degraded seals, this micro-movement will shear the rubber bands, causing immediate coolant contamination. Utilizing the standard dimensioned 6742-01-5159 sleeve core with a strict counterbore depth inspection ensures a locked interference fit, preserving complete isolation between the engine block oil galley and the cooling jacket.

Secure a Verified Industrial RFQ Within 24 Hours

To secure absolute parts compatibility and protect your production fleet from unnecessary downtime, please submit your complete Komatsu Engine Serial Number or Cummins dataplates to our customer support division. Our industrial specialists will run an official catalog check to guarantee that the 3948095 wet liner assembly perfectly matches your engine rebuild block tier constraints.

FAQ

Are Komatsu 6742-01-5159 and Cummins 3900328 identical components?

Yes, these numbers share identical engineering dimensions and metallurgical values. The 6742 series number is the official Komatsu designation assigned to capture parts supply for their 6D114 / S6D114 co-developed engines, aligning completely with Cummins factory records.

Should the lower block crevice packing rings be renewed along with this liner?

Absolutely. Every time a wet-type liner like the 3948095 sleeve is extracted, the lower sealing packing rings must be scrapped and replaced with fresh high-fluorine sealing sets to guarantee a leak-proof barrier against high temperature coolant.