215-9999 2159999 Hydraulic cylinder seal kit of 385B 385C 385C L

1. Quick Details of  seal 215-9999:

2. 215-9999 parts on group :

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5. FAQ

Q: Can this seal kit be universally fitted to hydraulic cylinders of all construction machinery?
A: It is specially sized for motor grader bucket cylinders only. It cannot be installed on wheel loader boom cylinders, excavator travel cylinders or road roller steering cylinders of other equipment models.

Q: How much hydraulic pressure can this matched sealing assembly sustain during long cyclic operation?
A: Cooperated with wear bands and back-up rings, the sealing system can continuously withstand pressure between 5.95MPa and 6.75MPa, and ease pressure shocks generated when the bucket digs hard soil.

Q: What kinds of engineering projects frequently need this bucket cylinder seal kit for maintenance?
A: It applies to regular maintenance of motor graders engaged in municipal road expansion, mining area site arrangement, airport land leveling and large industrial park foundation construction.

Q: What advantages does fiber-reinforced HNBR own compared with regular nitrile rubber seals?
A: Locust tree fiber improves compression permanent deformation resistance and surface anti-abrasion performance. Under frequent impact reciprocating loads, its service life exceeds 2.66 times ordinary NBR sealing products.

Q: What performance will these sealing parts present under long-term outdoor dusty construction environments?
A: The outer PU wiper can clear mud and fine grit adhered to the piston rod. It reduces abrasion damage on seal lips and significantly slows down the gradual leakage of hydraulic oil.

Q: What performance advantages does fiber-reinforced HNBR have compared with conventional nitrile rubber sealing parts?
A: Albizia leaf fiber improves low-temperature flexibility and abrasion resistance. Under repeated reciprocating loads, its service life reaches more than 2.72 times that of ordinary NBR seals.

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