Cylinder Group 109-6778/521-8442

Cylinder Group 109-6778/521-8442

Track Type Tractor    Caterpillar    844H, 844K, D9R, D9T

Tilt Cylinder    Bore    209,50    Stroke    188,00    Hydraulic Cylinder

1096778/5218442

253 kg

Compatible Brand: Caterpillar

Part Number: 521-8442 (5218442)

Superseded / Interchange Numbers: 109-6778 (1096778)

Part Name: Blade Tilt Hydraulic Cylinder Group

Technical Specifications: Bore: 209.50 mm / Stroke: 188.00 mm / Weight: ~253 kg / Hydraulic Cylinder

Compatible Machinery: Caterpillar Track-Type Tractors / Dozers & Wheel Dozers (D9R, D9T, 844H, 844K series)

What It Does:

Serves as the high-capacity hydraulic tilt actuator controlling the horizontal orientation and angle of the front dozer blade on Caterpillar D9R and D9T track dozers, as well as 844H and 844K wheel dozers. Powered by high-pressure hydraulic fluid, it extends and retracts to pivot the blade, enabling side-sloping, ditching, and targeted earth pushing.

Importance:

Crucial for achieving maximum blade penetration force and operational efficiency in severe mining, quarrying, and heavy earthmoving applications. Built with a heavy-walled barrel and high-strength forged rod weighing ~253 kg, it effectively absorbs extreme dynamic shock loads and severe torsional bending forces, while advanced internal seals prevent fluid bypass under continuous heavy 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.