4425743 CYL.;ARM (L)(for transportation) Hitachi parts of EX5500

1. Quick Details of  seal 4425743:

2. 4425743 parts on group :

3. 4425743 picture:

4. Service part number :

 
5. FAQ

Q: We are sourcing complete sealing overhaul parts for large excavator arm cylinder maintenance, could you offer the exact part number for our quotation list?
A: The exact matching part number is 4425743, this full arm cylinder seal kit is produced for large excavator arm cylinder field servicing and full hydraulic cylinder refurbishment assignments.

Q: Which hydraulic cylinder assembly does part number 4425743 fit on large excavator equipment?
A: 4425743 matches the arm hydraulic cylinder, it controls arm extension and retraction movements, supports digging, rock breaking and material grabbing operations under heavy‑duty quarry excavation conditions.

Q: What raw materials make up each sealing component within this repair kit?
A: It adopts NBR oil‑resistant o‑rings, PU wear‑resistant rod sealing lips, PTFE anti‑extrusion backup rings and POM guide rings to bear lateral impact load and frequent long‑stroke reciprocating friction in high‑pressure hydraulic systems.

Q: What about the dimensional stability and surface workmanship of these sealing spare parts?
A: Every seal maintains consistent raw‑material color, all sharp corners receive precise chamfering, dynamic contact surfaces go through fine finishing treatment to lower abrasion under repeated boom lifting cycles.

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.

6. Exhibition and Wearhous

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