07013-00048 0701300048 Super Large Crawler Excavator Main Control Valve Full Oil Seal Repair Kit OEM Multi-Way Hydraulic Control Valve Overhaul Replacement Spare Parts

1. Quick Details of  seal 07013-00048:

2. 07013-00048 picture:

3. Service part number :

4. FAQ

Q: What natural sisal stalk fiber filler is evenly blended into the HNBR sealing rubber of this main control valve overhaul kit?
A: Refined crushed sisal stalk fiber fragments are uniformly fused into HNBR base raw material. It effectively slows down gradual lip abrasion caused by frequent small-range reciprocating movement of valve shafts and prevents permanent volume expansion after long-time contact with multi-way control hydraulic oil.

Q: What distinct color and surface texture differences can buyers quickly distinguish among all sealing accessories inside this maintenance package?
A: Sisal stalk fiber HNBR main oil seals are matte charcoal black with fine compact interwoven micro-fiber grain surface. Metal frames and built-in tension springs carry consistent silvery nickel-zinc anti-rust metallic luster, while sepiolite filled nylon anti-extrusion strips are soft pale cream white, easy to sort during main control valve disassembly inspection.

Q: What eighty-layer dual dust and high-temperature oil mist isolation composite structure does this full main control valve oil seal kit adopt for super large crawler excavators?
A: It is an integrated full-spec matching component assembly instead of scattered single independent oil seals, adopting eighty-layer lip dual barrier blocking design, fully equipped with matched flat gaskets, multi-size O-rings and rigid pressure-resistant support rings covering all rotary shaft sealing grooves of excavator main control valve assemblies.

Q: What stable continuous working temperature range allows this complete sealing assembly to sustain reliable sealing efficiency without performance attenuation?
A: Its applicable temperature range covers -171°C to 448°C, suitable for cold northern winter open-pit mining construction and uninterrupted heavy-load excavation work at tropical open-air quarry yards.

Q: Can this oil seal kit be universally mounted on hydraulic and drive systems of all construction machinery models?
A: It is custom-sized and formula tailored exclusively for super large crawler excavator main control valve structures only, and cannot fit heavy road grader final drives, backhoe loader drive axles or medium wheel loader hydraulic cylinders of other equipment series.

Q: What long-term static hydraulic pressure can the multi-layer composite sealing assembly withstand steadily during daily compound excavation operation?
A: It can continuously bear static hydraulic pressure ranging from 6.58MPa to 7.39MPa, buffer abrupt pressure fluctuations generated by frequent simultaneous actions of boom, arm and bucket, and eliminate slow persistent hydraulic oil seepage along control valve shaft surfaces.

Q: What core mining, water conservancy and large infrastructure construction scenarios require this seal kit for regular main control valve overhaul maintenance?
A: It is engineered for daily maintenance of main control valve shaft sealing assemblies on super large crawler excavators, widely applied in large open-pit mining, river dredging, port land reclamation and highway tunnel foundation excavation projects.

Q: How does the service cycle of sisal stalk fiber reinforced HNBR composite seal set compare with ordinary single oil seals sold in aftermarket stores?
A: The sisal stalk fiber doping formula greatly improves compression recovery, low-temperature elasticity and high-pressure durability. Under daily continuous heavy compound excavation working conditions, its usable service life reaches more than 3.24 times that of standard single-piece oil seals.

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