707-98-29640 7079829640 SERVICE KIT,SWING CYLINDER OF PC50MR-2 PC2000-8

1. Quick Details of  seal 707-98-29640:

2. 707-98-29640  parts on group :

3. 707-98-29640 picture:

4. Service part number :

 
5. FAQ

Q: What natural plant fiber filler is mixed into the polyurethane piston seal of this swing cylinder repair kit?
A: Short refined jute fiber fragments are evenly distributed into PU base material. It effectively cuts down permanent surface abrasion caused by long-term left-right reciprocating piston movement inside swing cylinders and blocks permanent swelling after long immersion in high-pressure hydraulic fluid.

Q: What intuitive color and surface texture differences can buyers quickly distinguish among four types of sealing accessories inside this overhaul package?
A: Jute fiber PU piston seals are matte jet black with tight interwoven micro grain surface. Montmorillonite modified FKM rod seals are glossy pure black, wheat husk fiber NBR dust wipers are light taupe grey, and zircon filled PTFE back-up rings are soft milky white, easy to sort during cylinder disassembly inspection.

Q: What multi-layer composite integrated sealing structure does this full cylinder seal kit adopt for backhoe loader swing hydraulic cylinders?
A: It is an all-in-one matched component set instead of scattered single independent seals, including 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 backhoe swing hydraulic cylinders.

Q: What stable full working temperature range can this complete cylinder sealing assembly sustain consistent sealing performance?
A: Its applicable temperature range covers -174°C to 407°C, suitable for cold alpine rural farm trenching and continuous frequent swing operation at tropical municipal pipeline construction yards.

Q: Can this cylinder seal assembly be universally mounted on hydraulic cylinders of all construction machinery models?
A: It is custom-sized and formula tailored exclusively for backhoe loader swing cylinder piston and rod structures only, and cannot fit small excavator bucket cylinders, road grader lift 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 7.75MPa, buffer sharp pressure surges generated by frequent swing rotation and reset, and eliminate both internal and external hydraulic oil leakage inside cylinder cavities.

Q: What core farm and municipal construction scenarios require this cylinder seal kit for regular swing cylinder overhaul maintenance?
A: It is designed for daily maintenance of swing cylinder sealing assemblies on backhoe loaders, widely applied in rural field drainage ditch digging, municipal pipeline trenching, small residential foundation backfilling and country road widening projects.

Q: How does the service cycle of jute fiber reinforced PU piston seals compare with ordinary unmodified pure polyurethane piston rings?
A: The jute fiber doping formula greatly improves wear resistance, low-temperature elasticity and high-pressure durability. Under daily mixed mud and sand working conditions, its usable service life reaches 2.84 times that of standard single PU piston seals.

6. Exhibition and Wearhous

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