707-52-91160 7075291160 BUSHING OF D475A-5E0 D475A-3-HD

1. Quick Details of  seal 707-52-91160:

2. 707-52-91160 parts on group :

3. 707-52-91160 picture:

4. Service part number :

5. FAQ

Q: What raw materials make up this piston seal ring assembly?
A: The primary sealing ring adopts poplar fiber reinforced HNBR elastomer, equipped with silicon filled PTFE sliding ring and rigid modified POM back-up ring for matching assembly.

Q: What temperature range can this piston seal ring keep stable sealing performance?
A: Reliable working performance ranges from ‑30℃ up to 135℃ under variable outdoor road‑construction environment.

Q: What installation points should maintenance staff pay attention to?
A: Avoid sharp cylinder port edges scratching composite surface; do not twist or over‑stretch the ring while fitting it into piston groove.

Q: How should distributors store these piston seal rings in warehouse?
A: Keep flat in sealed packing bag, avoid long‑time compression and direct sunlight to prevent permanent deformation.

Q: What practical sign indicates piston seal ring needs replacement?
A: Slow cylinder drifting under static load, together with slight power drop when the grader carries out leveling tasks.

Q: What work should technicians complete in advance before installation?
A: Carefully clean impurities and tiny burrs inside the cylinder. Hard particles will abrade the sealing surface and shorten service life.

Q: What hydraulic malfunctions can this piston seal ring effectively prevent?
A: It inhibits internal hydraulic oil leakage inside the cylinder and prevents seal deformation caused by pressure difference on two sides of the piston.

Q: What prominent strengths does poplar fiber reinforced HNBR have compared with conventional rubber materials?
A: It has excellent shock resistance and stable compression resilience, adapting to frequent angle adjustment movement of grader tilt cylinders.

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

Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More