421-4026 4214026 82.5mm inner diameter U-shaped cup seal of 950F II 950M Z 966 GC

1. Quick Details of  seal 421-4026:

2. 421-4026  picture:

3. Service part number :

 
4. FAQ

Q: Can this piston rod seal be mounted to hydraulic cylinders of all construction machinery?
A: It is specially manufactured for grader tilt cylinders. It cannot fit excavator stick cylinders or wheel loader steering cylinders of different structural sizes.

Q: What is its main working effect during digging operation?
A: It prevents hydraulic fluid leaking outward through rod clearance and maintains sealing performance under shifting working pressure.

Q: Can this seal cope with relatively high oil temperature in continuous heavy‑duty digging work?
A: FKM energizer possesses good heat resistance, so the whole assembly keeps stable elasticity under elevated fluid temperature.

Q: Are these rod seals produced according to standard hydraulic cylinder gland groove specifications?
A: Each individual unit is precision sized to satisfy groove dimension requirements for heavy‑duty excavator hydraulic cylinders.

Q: Will frequent short‑stroke reciprocating movement accelerate wear on the sealing lip?
A: Modified PU material reduces surface friction, effectively slowing lip abrasion under repeated short‑stroke motions.

Q: Would performance drop if this seal works without paired wiper seal?
A: It can function alone for moderate conditions; matching wiper seal will block external grit and greatly extend service lifespan.

Q: What practical efficiency benefits can on-site excavator maintenance staff gain from using this fully pre-matched rod seal kit?
A: All supporting sealing accessories required for rod overhaul are pre-assembled into one complete set without separate procurement. Technicians do not need to carry scattered loose seals or repeatedly measure rod groove dimensions on site, greatly shortening cylinder repair time.

5. Exhibition and Wearhous

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