367-3929 3673929 138.4 mm inner diameter hydraulic cylinder piston rod seal of L 385C 374D L 365B

1. Quick Details of  seal 367-3929:

2. 367-3929 picture:

3. Service part number :

 
4. FAQ

Q: What construction environments is this hydraulic piston rod seal suitable for?
A: It adapts to foundation construction and quarry projects, resisting dust, muddy soil and frequent rotary reciprocating movement.

Q: How about the temperature adaptability of this sealing assembly?
A: It can operate steadily between -79°C and 374°C and maintain stable sealing performance under continuous heavy-duty rotation work.

Q: Should other sealing parts be replaced together when installing this rod seal?
A: We suggest replacing the matched dust seal at the same time to avoid premature wear of the newly installed piston rod seal.

Q: What common hydraulic issues can this piston rod seal effectively prevent?
A: It helps to avoid external hydraulic oil leakage and prevents seal deformation caused by frequent pressure changes during equipment rotation.

Q: What advantages does cedar fiber reinforced HNBR have compared with regular rubber?
A: It possesses outstanding rotary abrasion resistance and elastic recovery capacity, prolonging service life under frequent left-right rotation loads.

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.

5. Exhibition and Wearhous

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