Cylinder Group 4T5931/311-7786

Wheel Loader Caterpillar 785C, 785D Hoist Cylinder

Bore 292,10 Stroke 1.082,00 Hydraulic Cylinder

4T-5931/3117786

Compatible Brand: Caterpillar

Part Number: 311-7786 (3117786)

Superseded / Interchange Numbers: 4T-5931 (4T5931)

Part Name: Off-Highway Mining Truck Body Hoist Hydraulic Cylinder Group / Assembly

Teknik Özellikler / Technical Specifications: Bore: 292.10 mm / Stroke: 1,082.00 mm / Weight: Not Specified (Heavy Mining Class Alloy Steel Structure & Hard Chrome Plated Forged Rod) / Hydraulic Cylinder

Compatible Machinery: Caterpillar Large Off-Highway Mining Trucks (785C, 785D series)

What It Does:

Serves as the primary heavy-duty body hoist hydraulic cylinder assembly mounted between the main chassis frame and the dump body on Caterpillar 785C and 785D series 150-ton class off-highway haul trucks. Powered by high-pressure, high-flow hydraulic fluid across a massive 292.10 mm bore and 1,082.00 mm stroke, it converts hydraulic energy into powerful linear mechanical thrust to raise the fully loaded 150-ton dump body, discharging bulk rock, ore, and overburden efficiently, and lowering the empty body smoothly back onto the chassis pads.

Importance:

A vital kinematic and ultra-high-thrust hydraulic drive component essential for rapid dump cycle times, lifting stability, and site safety in demanding open-pit mining and quarrying applications. Engineered with a heavy-walled barrel, high-tensile forged alloy rod, and reinforced cylinder head assembly, it effectively absorbs extreme axial compressive loads, cyclic side-thrust forces, and dynamic pressure spikes caused by uneven payload discharge, while advanced heavy-duty seals prevent fluid bypass and cylinder drift under continuous extreme operating duty.

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.