A: Visible oil weeping at pipe connections, sudden drops in pilot system operating pressure, and a noticeable accumulation of abrasive dust around the coupling joints signal seal degradation. Replacing worn rings early prevents critical pump cavitation and fluid contamination.
A: Technicians must ensure the mating groove is completely free of old debris, rust, and sharp metallic burrs before placement. Lubricate the ring with clean hydraulic fluid prior to assembly to prevent pinching or twisting during connection torquing.
A: Verify your equipment manuals against 320D, 320DL, or 330D series schematics. Check that the original equipment manufacturer parts system requests part number 7F-8268 to guarantee a flawless structural match before completing wholesale orders.
A: The rugged elastomeric construction maintains optimal sealing elasticity and resists thermal hardening across temperatures from -40°C to 120°C. It effectively prevents pressure leakage despite heavy chassis vibrations during extreme rock breaking operations.
A: We provide original, OEM, and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companie





















