143-8138 1438138 171.86mm inner diameter piston wear-resistant ring of 568 FM LL 336D L 330D FM 385C 365B

1. Quick Details of  seal 143-8138:

2.  143-8138 picture:

3. Service part number :

4. FAQ

Q: Can this piston seal ring adapt to hydraulic cylinders of all construction equipment?
A: It is specially matched for grader lift cylinders. It cannot be installed on excavator stick cylinders or wheel loader tilt cylinders.

Q: Is this sealing ring equipped with split opening design?
A: Yes, it features inclined split cut, simplifying installation inside piston grooves. Non-split styles are also optional.

Q: What core function does this piston wear ring perform?
A: It supports piston assembly and prevents metal-to-metal contact to reduce cylinder abrasion and extend cylinder service life.

Q: What hydraulic pressure environment can this product adapt to?
A: The PA66 version suits medium-high pressure systems. If working under ultra-high pressure, we suggest choosing PTFE composite material version.

Q: Can it keep stable performance under continuous reciprocating movement?
A: Definitely, modified nylon material effectively lowers friction loss during long-time operation. PU material offers even quieter operation.

Q: What hydraulic media can this ring adapt to?
A: It is compatible with regular mineral hydraulic oil used on most excavator equipment.

Q: What core function does this piston seal ring perform inside the cylinder?
A: It separates high-pressure and low-pressure oil chambers inside the cylinder and prevents hydraulic fluid from flowing across both sides of the piston.

Q: What engineering projects commonly require replacement of this piston seal ring?
A: It serves routine maintenance of hydraulic cylinder piston sealing assemblies on medium crawler excavators, widely used in urban infrastructure, highway subgrade construction, small quarry loading and residential foundation excavation projects.

5. Exhibition and Wearhous

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