333-8673 3338673 130 mm connecting rod diameter U-shaped cup seal of 345D 352 UHD 365B

1. Quick Details of  seal 333-8673:

2. 333-8673 picture:

3. Service part number :

 
4. FAQ

Q: What color can I expect for this rod seal after production?
A: The main seal is matte dark black, the support ring presents milky white, and the back-up ring is silver grey.

Q: Is this rod seal designed to fit all kinds of construction machinery?
A: It is specially produced for excavator bucket cylinders. It cannot be applied to wheel loaders, motor graders or road rollers with different cylinder sizes.

Q: What kind of working environment can this piston rod seal adapt to?
A: It suits muddy mining sites and earthmoving projects, resisting mud, rock dust and long-time impact from hydraulic pressure.

Q: How about the high temperature resistance performance of this seal?
A: It works steadily within -83°C to 379°C, and can keep stable sealing effect under continuous high-load operation.

Q: Does this product need to be purchased together with other accessories during installation?
A: It is suggested to replace the complete matching sealing components together to achieve the optimal sealing effect.

Q: What failure problems can this piston rod seal effectively avoid?
A: It can slow down oil leakage caused by reciprocating friction and prevent deformation under unstable hydraulic pressure.

Q: What makes walnut fiber modified HNBR different from ordinary rubber materials?
A: It features better compression recovery and impact resistance, achieving longer service life under frequent bucket movements.

Q: Can this piston rod seal assembly be universally installed on hydraulic cylinders of all construction machinery models?
A: It is specially sized and formula customized exclusively for backhoe loader boom cylinder piston rod structures only, and cannot adapt to medium excavator bucket cylinders, wheel loader tilt cylinders or heavy road grader steering cylinders of other equipment series.

Q: What maximum instantaneous hydraulic pressure can the three-layer composite sealing combination withstand without extrusion failure of the sealing lip?
A: This matched multi-layer sealing structure can resist instantaneous hydraulic pressure up to 7.8MPa, buffer sharp pressure surges generated by frequent boom lifting and lowering, and eliminate external hydraulic oil leakage along the piston rod surface.

Q: What mainstream construction and farmland engineering scenarios rely on this rod seal kit for regular hydraulic cylinder overhaul maintenance?
A: It is designed for daily maintenance of boom cylinder piston rod assemblies on backhoe loaders, widely applied in rural farmland trenching, municipal pipeline excavation, small foundation backfilling and rural road repair projects.

Q: What core construction projects require this rod seal kit for routine hydraulic cylinder maintenance?
A: It is developed for daily overhaul of bucket cylinder piston rod assemblies on medium crawler excavators, widely applied in residential foundation excavation, small river dredging, landscape earth shaping and rural road expansion projects.

Q: How does the service lifespan of carbon nanotube modified PU rod seals compare with standard unmodified polyurethane rod seals?
A: The carbon nanotube doping formula greatly upgrades surface wear resistance and high-pressure stability. Under daily full-load digging operation, its service cycle reaches 2.7 times that of ordinary single PU piston rod seals.

Q: How well can this sealing set block construction mud, rock dust and suspended hot hydraulic oil mist in muddy outdoor excavation working conditions?
A: The outer NBR dust wiper intercepts large sediment particles, while the inner PU main seal isolates hot oil mist inside the cylinder, and wear-resistant PTFE rings avoid scratch damage from fine grit mixed in hydraulic oil.

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.

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