Q: How can I tell if my R220-9S boom cylinder seals have reached their wear limit?
A: Aside from visible external leaks, the most common symptom is "boom drift"—where the boom sinks while the joystick is in neutral. This indicates that the internal piston seals within the R220-9S kit are no longer holding pressure, potentially causing safety issues at the job site.
A: Aside from visible external leaks, the most common symptom is "boom drift"—where the boom sinks while the joystick is in neutral. This indicates that the internal piston seals within the R220-9S kit are no longer holding pressure, potentially causing safety issues at the job site.
Q: What technical precautions should be taken during the seal replacement process?
A: Thoroughly inspect the cylinder rod for any nicks or scratches before installation. Always use a generous amount of clean hydraulic oil as a lubricant during assembly. It is critical to ensure the seals are oriented correctly; installing a U-cup backward is a frequent error that results in immediate failure.
A: Thoroughly inspect the cylinder rod for any nicks or scratches before installation. Always use a generous amount of clean hydraulic oil as a lubricant during assembly. It is critical to ensure the seals are oriented correctly; installing a U-cup backward is a frequent error that results in immediate failure.
Q: How do I verify that this repair kit matches my Hyundai R220-9S fleet?
A: This kit is precision-matched to the R220-9S and R220LC-9S boom cylinders. We recommend cross-referencing your serial number plate or the specific part number in your Hyundai parts manual. Our technical team can also confirm compatibility if you provide the cylinder bore and rod diameters.
A: This kit is precision-matched to the R220-9S and R220LC-9S boom cylinders. We recommend cross-referencing your serial number plate or the specific part number in your Hyundai parts manual. Our technical team can also confirm compatibility if you provide the cylinder bore and rod diameters.
Q: How does this seal kit withstand extreme thermal cycling in mining zones?
A: The R220-9S kit is designed to remain flexible and effective in temperatures ranging from -35°C to 110°C. We use high-grade TPU that resists the "heat set" common in low-quality rubber, ensuring the seals don't become brittle after long shifts in high-temperature environments.
A: The R220-9S kit is designed to remain flexible and effective in temperatures ranging from -35°C to 110°C. We use high-grade TPU that resists the "heat set" common in low-quality rubber, ensuring the seals don't become brittle after long shifts in high-temperature environments.
Q: What quality options are available?
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 Companies
