A large surface copper mine experienced pre-mature seal failure on the suspension cylinders of heavy-duty, off-road haul trucks.
The suspension system was exposed to severe operating conditions including a heavy payload, shock load, and high frequency.
Cylinders with an OEM seal repair kit lasted only 6,000 to 8,000 hours.
The challenge was to extend the operating hours between maintenence intervals of the shock absorbers. Another goal was to use existing metallic components for repair/ upgrade of the cylinders.