358-8503 3588503 170 mm bore hydraulic bucket cylinder of 349F 345C 345D L VG 345D

1. Quick Details of  seal 358-8503:

2. 358-8503 picture:

3. Service part number :

4. FAQ

Q: How can buyers distinguish different sealing components by visual appearance?
A: HNBR main seals are matte jet black with compact texture; PU wiper rings are tan; PTFE wear strips are off-white; POM back-up rings are light grey. All components have smooth surfaces without rough edges.

Q: What working motions and construction conditions is this seal kit designed for motor grader lift cylinders?
A: This set fits frequent up and down adjustment of grader cutting blades. It prevents oil leakage and blocks road sediment during highway leveling, road repairing and ground trimming projects.

Q: What temperature range supports reliable continuous work of this whole sealing assembly?
A: Suitable working temperature covers -92°C ~ 388°C. It adapts to cold-region road construction and long-time leveling work under high-temperature open road sites.

Q: Can this sealing set be universally mounted on hydraulic cylinders of all engineering machines?
A: It is manufactured according to exclusive dimension standards for motor grader lift cylinders. It cannot fit wheel loader tilt cylinders, excavator arm cylinders or road roller steering cylinders of other equipment.

Q: What lasting hydraulic pressure can this matched sealing assembly withstand during cyclic repeated operation?
A: With support from wear strips and back-up rings, the sealing system continuously bears pressure between 5.15MPa and 5.95MPa and absorbs pressure shocks while cutting hard soil layers.

Q: What construction projects commonly require this grader lift cylinder seal kit for routine maintenance?
A: It serves equipment maintenance for municipal road reconstruction, rural highway paving, airport site leveling and open mining area road arrangement.

Q: What performance advantages does oak fiber reinforced HNBR have compared with ordinary nitrile rubber seals?
A: Oak fiber improves dynamic anti-fatigue capacity and surface wear resistance. Under repeated leveling loads, its service life reaches more than 2.34 times regular NBR sealing accessories.

Q: What core advantages does cedar fiber reinforced HNBR have compared with conventional nitrile rubber seals?
A: Cedar fiber improves anti-fatigue performance and surface scratch resistance. Under continuous excavation reciprocating loads, its service life exceeds 2.58 times of ordinary NBR sealing products.

5. Exhibition and Wearhous

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