172-3918 1723918 210 mm aperture two-piece seal of 385B 374F L 385C 374D L

1. Quick Details of  seal 172-3918:

2.  172-3918  picture:

3. Service part number :

4. FAQ

Q: Can this piston seal ring fit hydraulic cylinders of all construction machines?
A: It is specially produced for grader tilt cylinders. It cannot be used on excavator arm cylinders or wheel loader lifting cylinders.

Q: What working environments are suitable for this sealing component?
A: It works steadily on highway construction sites, adapting to frequent angle adjustment operations of grader blades.

Q: What temperature range can this piston seal ring sustain during continuous operation?
A: It maintains reliable sealing performance between -53°C ~ 128°C under long-time outdoor road construction work.

Q: What important installation advice can you give to maintenance workers?
A: Avoid twisting the flat sealing ring during assembly, and completely remove dirt and metal debris inside the piston installation groove.

Q: What core function does this piston seal ring perform inside the tilt cylinder?
A: It separates high-pressure and low-pressure oil chambers inside the cylinder and prevents cross-leakage of hydraulic oil on both sides of the piston.

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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