07001-05220 0700105220 RING,BACK-UP OF D155A-2A D155A-2

1. Quick Details of  seal 07001-05220:

2. 07001-05220 parts on group :

3.  07001-05220 picture:

4. Service part number :

5. FAQ

Q: What color features can be observed on each sealing component?
A: The main piston seal ring is semi-matte black, the PTFE sliding ring is cream white, and the supporting back ring presents pale ash grey.

Q: Can this piston seal ring be universally used on hydraulic cylinders of all construction machinery?
A: It is specially manufactured for wheel loader lift cylinders. It cannot adapt to bulldozer tilt cylinders or excavator boom cylinders with different structural sizes.

Q: What kinds of working sites fit this piston seal ring well?
A: It works reliably in logistics yards and sand quarries, adapting to frequent lifting operations and environments mixed with dust and fine gravel.

Q: How is the temperature resistance performance of this whole sealing assembly?
A: It maintains stable sealing efficiency between -69°C and 364°C and keeps balanced tightness under continuous reciprocating piston movement.

Q: What preparation steps should technicians complete before installation?
A: Polish and clean cylinder inner walls thoroughly. Tiny scratches or residual particles will accelerate abrasion of the sealing surface.

Q: What hydraulic problems can this piston seal ring effectively prevent?
A: It blocks internal hydraulic oil leakage inside the cylinder and avoids seal distortion caused by pressure difference on two sides of the piston.

Q: What core performance merits does oak fiber reinforced HNBR have compared with regular rubber?
A: It boasts excellent compression set resistance and wear resistance, perfectly matching frequent lifting cycles of wheel loader hydraulic cylinders.

Q: Can this sealing set sustain long-term work under continuously changing hydraulic pressure?
A: Sure. It copes with alternating pressure generated during material loading and reduces material aging speed under cyclic loads.

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.

6. Exhibition and Wearhous

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