421-4025 4214025 76.15mm inner diameter U-shaped cup seal of IT62G II IT62G

1. Quick Details of  seal 421-4025:

2. 421-4025 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: Where is this piston rod seal installed on bulldozer equipment?
A: It fits inside the cylinder head groove, working directly against the reciprocating hydraulic piston rod surface.

Q: Where is this piston rod seal installed on excavator?
A: It is fitted inside the gland groove of boom, arm and bucket hydraulic cylinders, directly contacting reciprocating piston rod surface.

Q: What is the core working effect of this seal during machine operation?
A: It prevents hydraulic fluid leaking outward along piston‑rod clearance and sustains stable sealing under fluctuating working pressure.

Q: Can this seal keep stable performance under frequent impact load of digging work?
A: The energized composite structure adapts well to pressure shocks and maintains sealing performance under cyclic digging load conditions.

Q: Are these rod seals produced to meet standard hydraulic cylinder groove dimensional requirements?
A: Every unit is precision manufactured to match standard gland groove dimensions for heavy‑duty excavator hydraulic cylinders.

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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