07013-40090 0701340090 Medium Excavator Main Hydraulic Pump Full Oil Seal Repair Kit OEM Primary Hydraulic Power Supply Assembly Overhaul Replacement Spare Parts

1. Quick Details of  seal 07013-40090:

2. 07013-40090 picture:

3. Service part number :

4. FAQ

Q: What modified elastomer raw material is adopted for the core rotary oil seals inside this main hydraulic pump overhaul kit?
A: The primary rotary oil seals adopt chinaberry leaf fiber modified HNBR compound. This kit is equipped with FKM static sealing rings and PA66 backup rings to fit all dynamic and static sealing grooves of the main hydraulic pump 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 subtle uniform grain; metal shells and tension springs have consistent silvery manganese vanadate passivated surface; nylon backup rings are light beige. All accessories are precision trimmed without burrs or surface warpage.

Q: What continuous variable-load rotation working conditions is this oil seal kit designed to adapt to on medium excavator main hydraulic pumps?
A: This integrated kit combines rotary shaft lip seals and static flange sealing pieces. It prevents high-pressure hydraulic medium leakage and blocks external muddy pollutants from entering the pump during continuous digging, lifting and slewing operations on construction sites.

Q: What continuous working temperature range enables this whole sealing kit to sustain reliable sealing efficiency?
A: Its applicable temperature range covers -141°C to 435°C, suitable for cold mountain open-pit excavation and long-duration continuous high-pressure hydraulic work in tropical quarry construction yards.

Q: Can this oil seal kit be universally installed on main hydraulic pumps of all construction machinery?
A: It is dimensionally customized exclusively for medium excavator main hydraulic pump structures only. It cannot match motor grader hydraulic assemblies, wheel loader travel motors or road roller vibration units of 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 6.34MPa and 7.14MPa, and buffer pressure fluctuations generated during sudden heavy digging impact.

Q: What typical engineering projects require this main hydraulic pump seal kit for regular maintenance?
A: It supports routine overhaul of main hydraulic pump sealing assemblies on medium excavators, widely applied in open pit mining, river dredging, urban foundation construction and highway expansion projects.

Q: How does the service life of fiber-modified HNBR oil seals compare with ordinary standard NBR oil seals on the spare parts market?
A: The added plant fiber filler greatly improves compression recovery and anti-fatigue property. Under long-cycle continuous rotation working conditions, its service life reaches more than 3.46 times that of conventional nitrile oil seals.

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