Rod As. 389-1021

Articulated/Off Highway Caterpillar 745

Hoist Cylinder Bore 139,70 Stroke 2.581,00 Hydraulic Cylinder

3891021

155 kg

Compatible Brand: Caterpillar

Part Number: 389-1021 (3891021)

Superseded / Interchange Numbers: 389-1021, 3891021

Part Name: Articulated Truck Body Hoist Cylinder Rod Assembly

Technical Specifications: Cylinder Bore Fitment: 139.70 mm / Stroke: 2,581.00 mm / Weight: ~155 kg / Hydraulic Cylinder Piston Rod

Compatible Machinery: Caterpillar Articulated Dump Trucks (745 series)

What It Does:

Serves as the heavy-duty piston rod assembly operating inside the primary body hoist hydraulic cylinders on Caterpillar 745 series articulated dump trucks. It converts high-pressure hydraulic fluid forces into powerful linear mechanical thrust, extending through a 2,581.00 mm long stroke to elevate the fully loaded dump body for rapid payload discharge and retracting to seat the empty body back onto the chassis frame safely.

Importance:

A critical kinematic load-bearing component that endures immense axial compressive loads, severe cyclic bending moments, and dynamic shock stresses during full-payload tipping operations on uneven mining terrains. Manufactured from a massive 155 kg high-tensile forged alloy steel structure with induction hardening, hard chrome plating, and precision micro-finish surface grinding, it effectively resists buckling, surface scoring, and abrasive wear, while ensuring tight seal engagement to prevent hydraulic fluid leaks 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.