707-98-13890 7079813890 SERVICE KIT,BLADE LIFT CYLINDER OF PC20MR-2-A PC20MR-2-B

1. Quick Details of  seal 707-98-13890:

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5. FAQ

Q: What natural plant fiber filler is integrated into the polyurethane piston seal of this tilt cylinder repair kit?
A: Purified short cotton fiber fragments are evenly dispersed into PU base material. It effectively slows permanent surface abrasion created by long-term repeated piston back-and-forth movement inside tilt cylinders and stops permanent dimensional swelling after continuous contact with high-pressure hydraulic transmission fluid.

Q: What clear color and surface texture differences can buyers quickly identify among four categories of sealing accessories inside this overhaul kit?
A: Cotton fiber PU piston seals are matte dark black with tight compact micro-fiber grain surface. Feldspar modified FKM rod seals are glossy jet black, corn husk fiber NBR dust wipers are ash brown grey, and alumina filled PTFE back-up rings are soft pale off-white, easy to separate during cylinder disassembly and inspection.

Q: What multi-layer composite integrated sealing structure does this full cylinder seal kit adopt for heavy wheel loader tilt hydraulic cylinders?
A: It is an all-in-one matched component assembly instead of scattered single independent seals, consisting of piston composite sealing unit, rod pressure-resistant sealing lip, outer mud-scraping dust wiper and inner anti-extrusion support rings, fully matching all sealing grooves of loader tilt hydraulic cylinders.

Q: What complete stable working temperature range allows this whole cylinder sealing assembly to sustain consistent reliable sealing performance?
A: Its applicable temperature range spans -173°C to 406°C, suitable for freezing plateau winter aggregate stockpiling and uninterrupted heavy bucket tilting work at tropical port and quarry yards.

Q: Can this cylinder seal assembly be universally fitted to hydraulic cylinders of all construction machinery models?
A: It is custom-sized and formula customized exclusively for heavy wheel loader tilt cylinder piston and rod structures only, and cannot adapt to medium excavator swing cylinders, road grader lift cylinders or backhoe loader bucket cylinders of other equipment series.

Q: What maximum instantaneous hydraulic pressure can the multi-composite matched seal combination withstand without extrusion deformation damage?
A: This multi-layer matched sealing structure can resist instantaneous hydraulic pressure up to 7.8MPa, buffer sharp pressure surges generated by frequent bucket lifting and dumping, and eliminate both internal and external hydraulic oil leakage inside cylinder cavities.

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