07013-40125 0701340125 SEAL,OIL OF D355C-3 D355A-3X

1. Quick Details of  seal 07013-40125:

2. 07013-40125 parts on group :

3. 07013-40125 picture:

4. Service part number :

5. FAQ

Q: What modified elastomer raw material is adopted for the core reciprocating oil seals inside this boom cylinder overhaul kit?
A: The primary reciprocating oil seals adopt hawthorn leaf fiber modified HNBR compound. This kit contains NBR static sealing rings and PA66 backup rings to match all dynamic and static sealing grooves of the boom cylinder assembly.

Q: What exterior characteristics help buyers quickly distinguish all sealing accessories inside the package?
A: Fiber reinforced HNBR oil seals are matte jet black with fine uniform texture; metal shells and tension springs have consistent silvery titanium vanadate passivated surface; nylon backup rings are light ivory. All accessories are precision processed without burrs or deformation.

Q: What heavy-load reciprocating working conditions is this oil seal kit designed to adapt to on medium excavator boom cylinders?
A: This integrated kit consists of piston reciprocating seals and static flange gaskets. It prevents hydraulic oil leakage and blocks external muddy contaminants from entering the cylinder during frequent boom lifting and lowering for earthmoving work.

Q: What continuous working temperature range enables this whole sealing kit to maintain reliable sealing efficiency?
A: Its applicable temperature range covers -139°C to 433°C, suitable for cold mountain foundation excavation and long-duration repeated boom operation under high-temperature open-air construction environments.

Q: Can this oil seal kit be universally installed on boom cylinders of all construction machinery?
A: It is dimensionally customized exclusively for medium excavator boom cylinder structures only. It cannot fit hydraulic assemblies of motor graders, travel motors of wheel loaders or vibration motors of road rollers from other equipment series.

Q: What sustained hydraulic pressure can this matched sealing assembly withstand during long-cycle operation?
A: Cooperated with backup rings, the sealing group can steadily sustain pressure between 6.30MPa and 7.10MPa, and buffer pressure fluctuations generated during sudden load lifting.

Q: What typical engineering projects require this boom cylinder seal kit for regular maintenance?
A: It supports routine overhaul of boom cylinder sealing assemblies on medium excavators, widely used in mine excavation, river dredging, urban infrastructure construction and farmland renovation projects.

Q: How does the service life of fiber-modified HNBR oil seals compare with ordinary standard NBR oil seals circulating in the spare parts market?
A: Cedar leaf stalk fiber filler greatly improves compression recovery and anti-hydrolysis aging performance. Under long-cycle intermittent reciprocating working conditions, its service life reaches more than 2.70 times that of conventional nitrile oil seals.

Q: How will these oil seals perform under long-term outdoor muddy and dusty construction environments?
A: The precision sealing lip can wipe tiny particles adhered to the piston rod surface. The metal outer shell isolates coarse grit, lowering abrasive wear and slowing down the occurrence of slow steering oil seepage.

Q: How well can this full sealing kit block mud, gravel dust and hot gear oil mist on muddy outdoor road job sites?
A: The multi-layer flexible rubber lip scrapes thick mud off the shaft surface, the fully enclosed plated metal shell blocks coarse dust particles, and inner auxiliary rubber layers isolate high-temperature oil mist to protect internal precision gears.

6. Exhibition and Wearhous

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