3919053 Cummins Piston Pin For 4BT3.9 6BT5.9 Engines

Product Overview：

The 3919053 piston pin is a core power transmission component for medium-duty Cummins B-series diesel engines. It acts as the connecting pivot between piston and connecting rod, transferring combustion impact force to the crankshaft assembly. Positioned as a universal replacement part covering light commercial vehicle, medium truck and construction machinery engine platforms, balancing durability, compatibility and cost efficiency for aftermarket repair and equipment assembly.

3919053 piston pin Specification:

✅Light hollow structure: Cuts reciprocating inertia, vibration & fuel use at high RPM

✅Carburized quenching: Hard wear-resistant surface, tough anti-fatigue core

✅Precision mirror grinding: Tight tolerances, smooth surface prevents wear & knocking

✅Full-floating fit with circlips: Free rotation, even load, longer matching parts life

Application:

✅Light/medium commercial trucks: Dongfeng Kinland, early Tianlong, passenger coaches

✅Construction machinery: Wheel loaders, excavators, road rollers with 4BT/6BT/QSB engines

✅Stationary power: Diesel generator sets, agricultural water pump units

✅Aftermarket repair: Complete four-piece overhaul kits for fleets and repair shops

Why Choose US?

✅Professional China-based Cummins parts supplier

✅Genuine Cummins quality, strict factory inspection

✅Direct factory supply with competitive cost advantage

✅Stable stock & fast global delivery

✅Technical matching support for all B-series engines