116-3589 1163589 Heavy Road Grader Steering Cylinder Piston Seal Ring Kit OEM Hydraulic Cylinder Overhaul Replacement Spare Parts 740B D400E II 730C

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5. FAQ

Q: What three-layer composite integrated matching structure does this piston seal kit adopt for heavy road grader steering hydraulic cylinders?
A: It is a complete matched component set rather than single independent piston rings, including primary PU piston seal, anti-extrusion PTFE retaining rings and elastic pre-tightening O-rings, fully matching all piston sealing grooves of steering cylinders.

Q: What stable working temperature range can this whole piston sealing assembly keep reliable sealing performance?
A: Its applicable temperature range covers -168°C to 402°C, suitable for frigid northern winter highway construction and continuous long-hour steering grading work under high-temperature open-air road yards.

Q: Can this piston seal assembly be universally installed on hydraulic cylinders of all construction machinery types?
A: It is specially sized and formula customized only for heavy road grader steering cylinder piston structures, and cannot fit large excavator arm cylinders, wheel loader lift cylinders or small bulldozer tilt cylinders of other equipment series.

Q: What maximum instantaneous hydraulic pressure can the composite piston seal combination bear without extrusion deformation damage?
A: The three-layer matched sealing structure can resist instantaneous hydraulic pressure up to 7.6MPa, buffer sudden pressure surges from frequent steering left and right swing, and eliminate internal hydraulic oil leakage inside cylinder cavities.

Q: What mainstream road construction scenarios need this piston seal kit for regular hydraulic cylinder overhaul maintenance?
A: It is designed for daily overhaul of steering cylinder piston assemblies on heavy road graders, widely applied in highway pavement leveling, municipal road base renovation, airport runway trimming and mountain village road widening projects.

Q: Can this piston sealing assembly block road mud, fine stone dust and suspended hot hydraulic oil mist in long-time outdoor road construction environments?
A: The tight integrated seal structure separates tiny sediment and hot oil mist from penetrating piston matching gaps, and wear-resistant PTFE retaining rings prevent scratch abrasion caused by mixed gravel dust inside hydraulic fluid.

Q: What convenient labor-saving advantages can field grader maintenance technicians gain from using this fully pre-matched piston seal kit?
A: All supporting sealing parts required for piston overhaul are pre-matched into one complete set without separate purchase. Workers do not need to carry scattered loose seals or repeatedly measure groove sizes on site, significantly shortening cylinder repair duration.

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