367-3933 3673933 143.4 mm inner diameter U-shaped cup rod seal of 385C L 374F L 374D L

1. Quick Details of  seal 367-3933:

2. 367-3933 picture:

3. Service part number :

 
4. FAQ

Q: What raw material constitutes the main sealing part of this piston rod seal?
A: The primary sealing body adopts hawthorn fiber reinforced HNBR elastomer, matched with silicon-filled PTFE support ring and POM back-up ring for assembly.

Q: What colors can customers receive for this set of sealing parts?
A: The main rod seal is matte dark black, the PTFE guide ring is off-white, and the back-up ring shows light grey tone.

Q: Can this piston rod seal fit all types of construction machinery cylinders?
A: It is specially developed for excavator arm cylinders. It cannot be installed on tilt cylinders of wheel loaders or lift cylinders of motor graders.

Q: What kind of working scenarios are suitable for this hydraulic rod seal?
A: It adapts to earthmoving, rock digging and foundation construction sites with muddy terrain and continuous reciprocating cylinder movement.

Q: How is the high and low temperature resistance performance of this seal assembly?
A: It runs stably within the temperature range of -80°C to 376°C and maintains stable sealing effect under continuous high-load operation.

Q: Do we need to match other sealing accessories while replacing this piston rod seal?
A: It is recommended to replace matched dust wiper and auxiliary sealing parts together to achieve optimal sealing performance.

Q: What hydraulic failure risks can this piston rod seal effectively prevent?
A: It can slow down external oil leakage caused by long-term reciprocating friction and resist extrusion deformation under fluctuating working pressure.

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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