721-98-00350 7219800350 Stick Hydraulic Cylinder Complete Seal Repair Kit for Excavator Stick Cylinder Field Rebuild & Maintenance

1. Quick Details of  seal 721-98-00350:

2.  721-98-00350 picture:

3. Service part number :

 
4. FAQ

Q: I need to repair my excavator stick cylinder, can you tell me which seal kit I should order?
A: The correct part number you need is 721‑98‑00350, this complete stick cylinder seal kit is developed for excavator stick cylinder field repair and overhaul jobs.

Q: Which hydraulic cylinder does part number 721‑98‑00350 exactly fit on the excavator machine?
A: 721‑98‑00350 is matched to the stick hydraulic cylinder which controls stretching and retracting actions of the excavator intermediate arm during excavation work.

Q: What raw materials make up the different sealing components inside this repair set?
A: It uses NBR for oil resistant o‑rings, PU for wear‑resistant main rod seals, PTFE backup rings to resist extrusion, and PA nylon for low‑friction guide wear rings.

Q: What sealing parts are included inside this full repair kit?
A: It contains piston seals, rod seals, buffer rings, PTFE backup rings, dust wiper seals and various sizes of supporting O‑rings for cylinder reassembly.

Q: Where is this cylinder seal kit mounted on mini excavator?
A: These sealing assemblies are installed inside cylinder barrel and cylinder head, surrounding piston and reciprocating bucket cylinder rod.

Q: Can this product prevent hydraulic oil leakage effectively?
A: The precise size design effectively reduces internal leakage and external oil seepage.

Q: What construction scenarios often require this arm cylinder seal kit for regular maintenance?
A: It is widely used for maintaining mini excavators working on villa foundation projects, landscape engineering, pipeline trenching and rural road reconstruction.

5. Exhibition and Wearhous

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