Cylinder Group 143-8004

Cylinder Group 143-8004

Excavator    Caterpillar    365B, 365B II, 365B L, 365C, 365C L, 385C

Bucket Cylinder    Bore    180,00    Stroke    1.443,00    Hydraulic Cylinder

1438004

500 kg

Compatible Brand: Caterpillar

Part Number: 143-8004 (1438004)

Superseded / Interchange Numbers: 143-8004, 1438004

Part Name: Excavator Bucket Hydraulic Cylinder Group / Assembly

Technical Specifications: Bore: 180.00 mm / Stroke: 1,443.00 mm / Weight: ~500 kg / Hydraulic Cylinder

Compatible Machinery: Caterpillar Heavy Hydraulic Excavators (365B, 365B II, 365B L, 365C, 365C L, 385C series)

What It Does:

Serves as the primary bucket hydraulic actuator controlling bucket curling (rollback) and dumping movements via the bucket linkage on Caterpillar 365 and 385 series heavy hydraulic excavators. Powered by high-pressure hydraulic fluid, it extends and retracts to drive the bucket into harsh rock and soil surfaces, enabling efficient digging, material retention during swing, and dumping into haulers or hoppers.

Importance:

Critical for defining bucket breakout force, penetration capability, and digging cycle speed in heavy mining, quarrying, and large-scale excavation operations. Built with a massive 500 kg heavy-walled barrel and high-strength forged rod structure, it effectively absorbs extreme dynamic impact loads, rock shock forces, and severe bending stress, while advanced internal seals prevent fluid bypass under continuous high-pressure operation.

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.