Piston As. 519-9626

Excavator Caterpillar 320

Bucket Cylinder Bore 115,00 Stroke 1.104,00 Hydraulic Cylinder

5199626

Compatible Brand: Caterpillar

Part Number: 519-9626 (5199626)

Superseded / Interchange Numbers: 519-9626, 5199626

Part Name: Excavator Bucket Cylinder Piston Assembly

Technical Specifications: Cylinder Bore Fitment: 115.00 mm / Stroke: 1,104.00 mm / Weight: Not Specified (Heavy-Duty Ductile Iron / Alloy Steel) / Hydraulic Cylinder Piston Assembly

Compatible Machinery: Caterpillar Next Gen Hydraulic Excavators (320 series)

What It Does:

Serves as the internal piston assembly operating inside the bucket hydraulic cylinder on Caterpillar Next Gen 320 series hydraulic excavators. Mounted onto the cylinder rod, it separates the cylinder barrel into two distinct hydraulic pressure chambers (extend and retract sides) and houses the dynamic piston seals, wear rings, and guide bands. It converts hydraulic fluid pressure into direct linear mechanical force to drive bucket curling (closing) and dumping (opening) motions.

Importance:

A critical internal drive component essential for maintaining peak hydraulic efficiency, bucket breakout force, and operational cycle speed. Precision-machined to match the 115.00 mm cylinder bore, it is built to withstand high hydraulic pressure spikes, dynamic shock loads, and cyclic fatigue during heavy excavation and digging operations, while providing an optimal seating groove profile for internal seals to prevent fluid bypass and internal barrel wear.

As Seçkin Makine, we manufacture this product as an aftermarket item fully equivalent to the original specifications in terms of raw materials, technical dimensions, and performance characteristics. This product comes with a 1-year warranty from the invoice date.