8C-9179 8C9179 200mm aperture two-piece seal of 385B 374F L 385C 374D L 365B

1. Quick Details of  seal 8C-9179:

2.  8C-9179  picture:

3. Service part number :

4. FAQ

Q: What materials make up this set of piston seal rings?
A: The main sliding ring adopts poplar fiber filled PTFE, paired with elastic NBR backing ring to realize dynamic sealing function.

Q: Could this piston seal ring fit all hydraulic cylinders of construction machines?
A: It is specially manufactured for wheel loader lift cylinders. It cannot adapt to cylinder piston grooves of excavators or graders.

Q: What kinds of working sites suit this sealing assembly?
A: It works reliably at material yards and ports, coping with frequent lifting movements under continuous medium load operation.

Q: What temperature range can this piston seal ring withstand continuously?
A: It maintains stable sealing capacity within -55°C ~ 135°C during all-day loading and unloading operations.

Q: What guidance can you offer technicians during installation?
A: Do not twist the flat seal ring while assembling, and thoroughly wipe away dirt and metal scraps inside the piston groove beforehand.

Q: What vital role does this piston seal ring play inside the lift cylinder?
A: It isolates high-pressure and low-pressure oil chambers inside the cylinder and prevents hydraulic oil flowing across both sides of the piston.

Q: What installation tips should maintenance technicians follow?
A: Avoid bending the flat seal ring violently during assembly, and clear sediment inside the piston groove completely in advance.

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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