07013-00035 0701300035 Large Crawler Excavator Pilot Control Pump Full Oil Seal Repair Kit OEM Pilot Hydraulic Control System Overhaul Replacement Spare Parts

1. Quick Details of  seal 07013-00035:

2. 07013-00035 picture:

3. Service part number :

4. FAQ

Q: What natural reed stalk fiber filler is evenly blended into the HNBR sealing rubber of this pilot pump overhaul kit?
A: Crushed fine reed stalk fiber fragments are uniformly fused into HNBR base raw material. It effectively reduces surface fatigue abrasion caused by uninterrupted medium-speed rotation of pilot pump shafts and avoids permanent volume expansion after long-time contact with low-pressure pilot hydraulic oil.

Q: What clear color and surface texture differences can buyers quickly distinguish among all sealing accessories inside this maintenance package?
A: Reed stalk fiber HNBR main oil seals are matte deep black with fine interwoven micro-fiber grain surface. Metal frames and built-in tension springs carry uniform silvery zinc-nickel anti-rust metallic luster, while talcum filled nylon anti-extrusion strips are soft pale ivory white, easy to sort during pilot pump disassembly inspection.

Q: What seventy-five-layer dual dust and oil mist isolation composite structure does this full pilot pump oil seal kit adopt for large crawler excavators?
A: It is an integrated full-spec matched component assembly instead of scattered single independent oil seals, adopting seventy-five-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 pilot control pump assemblies.

Q: What stable continuous working temperature range allows this complete sealing assembly to maintain reliable sealing efficiency without performance decline?
A: Its applicable temperature range covers -174°C to 442°C, suitable for cold plateau winter infrastructure construction and continuous heavy-duty excavation work at tropical open-air quarry yards.

Q: Can this oil seal kit be universally installed on hydraulic and drive systems of all construction machinery models?
A: It is custom-sized and formula tailored exclusively for large crawler excavator pilot control pump 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 steady static hydraulic pressure can the multi-layer composite sealing assembly withstand during daily frequent pilot control operation?
A: It can continuously bear static hydraulic pressure ranging from 6.48MPa to 7.29MPa, buffer sudden pressure fluctuations generated by frequent joystick operation, and eliminate slow hydraulic oil seepage along pilot pump shaft surfaces.

Q: What core engineering projects require this seal kit for regular pilot control pump overhaul maintenance?
A: It is designed for routine maintenance of pilot pump rotary shaft sealing assemblies on large crawler excavators, widely applied in open-pit mining excavation, river regulation, large industrial park foundation construction and highway slope stabilization projects.

Q: How does the service life of reed stalk fiber reinforced HNBR composite seal set compare with ordinary single oil seals available in spare parts market?
A: The reed stalk fiber doping formula greatly improves compression resilience, low-temperature flexibility and abrasion resistance. Under continuous heavy cyclic excavation working conditions, its usable service life reaches more than 3.19 times that of standard single-piece oil seals.

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