707-99-67520 7079967520 Seal Kit, Bucket Cylinder OF PC1250-8

1. Quick Details of  seal 707-99-67520:

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5. FAQ

Q: What natural plant fiber additive is blended into the polyurethane piston seal of this bucket cylinder repair kit?
A: Processed short rice straw fiber fragments are evenly fused into PU base raw material. It effectively restrains irreversible surface abrasion caused by long-term repeated piston back-and-forth movement inside bucket cylinders and prevents permanent dimensional expansion after long-time contact with high-pressure hydraulic transmission fluid.

Q: What clear color and surface texture differences can buyers quickly distinguish among four types of sealing accessories inside this maintenance package?
A: Rice straw fiber PU piston seals are matte dark black with compact interwoven micro-fiber grain surface. Feldspar modified FKM rod seals are glossy jet black, sunflower husk fiber NBR dust wipers are ash brown grey, and magnesia filled PTFE back-up rings are soft pale off-white, easy to sort during cylinder disassembly and inspection.

Q: What multi-layer composite integrated sealing structure does this full cylinder seal kit adopt for medium crawler excavator bucket hydraulic cylinders?
A: It is an integrated full-size matched component assembly instead of scattered single independent seals, including piston composite sealing group, rod pressure-resistant sealing lip, external mud scraping dust wiper and inner anti-extrusion support rings, fully matching all sealing grooves of medium excavator bucket hydraulic cylinders.

Q: What stable full operating temperature range can this complete cylinder sealing assembly maintain consistent reliable sealing performance?
A: Its applicable temperature range covers -169°C to 410°C, suitable for cold mountain open-pit small-scale mining and continuous high-frequency bucket digging work at tropical urban foundation construction yards.

Q: Can this cylinder seal assembly be universally installed on hydraulic cylinders of all construction machinery models?
A: It is custom-sized and formula tailored exclusively for medium crawler excavator bucket cylinder piston and rod structures only, and cannot fit road grader lift cylinders, backhoe loader swing cylinders or heavy wheel loader tilt 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 7.65MPa, buffer sharp pressure surges generated by frequent bucket digging and unloading, and eliminate both internal and external hydraulic oil leakage inside cylinder cavities.

Q: What core municipal and small mining construction scenarios require this cylinder seal kit for regular hydraulic cylinder overhaul maintenance?
A: It is designed for daily maintenance of bucket cylinder sealing assemblies on medium crawler excavators, widely applied in residential foundation excavation, small river dredging, landscape terrain shaping and rural road expansion projects.

Q: How does the service cycle of rice straw fiber reinforced PU piston seals compare with ordinary unmodified pure polyurethane piston rings?
A: The rice straw fiber doping formula greatly upgrades wear resistance, low-temperature flexibility and high-pressure tolerance. Under daily medium-load digging working conditions, its usable service life reaches 2.79 times that of standard single PU piston seals.

6. Exhibition and Wearhous

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