Robust Sealing System:
Caterpillar employs a multi-stage sealing package designed for this harsh application:
Heavy-Duty Wiper Seal: The first line of defense. It aggressively scours mud, grit, and moisture from the rod as it retracts, preventing contamination from entering the system.
Buffer Seal: Protects the primary rod seal from damaging high-pressure pulses that occur during digging.
Primary Rod Seal: Contains the main system pressure within the cylinder.
Piston Seals: Prevent internal leakage across the piston, ensuring efficient power transfer and preventing cylinder drift.
Wear Bands/Bearing Bands: Guide the piston and rod, preventing metal-to-metal contact and ensuring smooth, even movement without binding.
This 417-6665 bucket cylinder is used 374D 374F excavator.
EXCAVATOR
374F 374F L
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