07010-00048 0701000048 HNBR PU FKM Carbon Filled PTFE Multi-Material Composite Oil Seal Kit for Bulldozer Steering Motor Servicing & Overhaul

1. Quick Details of  seal 07010-00048:

2. 07010-00048  picture:

3. Service part number :

4. FAQ

Q: What distinct color and structural visual differences allow maintenance technicians to quickly identify each component inside this steering motor seal kit?
A: HNBR rotary shaft and piston main seals are matte jet black with double-lip rotary integrated sealing structure, the contact lip surface undergoes precision nano mirror polishing without burrs or micro abrasion scratches. Special arched PU buffer rings are pale apricot yellow with exclusive curved arch shock absorption outline, visually distinguishable from wedge, oval and circular buffer rings used on lift cylinders, travel motors and hydraulic valve assemblies. FKM static O-rings are dark coffee brown with uniform round cross-section, no shrinkage or permanent deformation after long-term warehouse storage. Carbon-filled PTFE anti-extrusion rings are off-white with evenly scattered tiny black carbon particles on the surface, easy to separate from light gray graphite-filled PTFE rings applied to hydraulic control valves. The medium-duty dust wiper is thick black with dual internal and external scraping lips; the outer coarse lip blocks large mud clumps and gravel, while the inner fine lip filters ultra-fine abrasive silt particles. Each accessory is printed with clear steering motor matching dimension marks on the surface for rapid sorting and matching during on-site assembly.

Q: What wide temperature range and variable rotary hydraulic pressure working conditions can this four-material composite seal kit sustain for long-term stable continuous operation?
A: This integrated oil seal kit can steadily bear sustained long-term working pressure up to 422 bar, and withstand instantaneous peak impact pressure up to 478 bar without extrusion failure of delicate sealing components. HNBR and PU components retain stable elastic recovery and sealing performance within -38°C ~ +122°C, fully adapting to sub-zero frozen mountain construction in winter. FKM O-rings can operate reliably within -26°C ~ +145°C, perfectly matching the ultra-high-temperature hydraulic oil circulation state of non-stop full-load earthmoving and road leveling in summer. Carbon-filled PTFE backup rings will not soften or deform under variable-speed rotary friction and persistent high temperature, maintaining consistent anti-leakage protective performance through all seasonal construction environments.

Q: What hidden steering hydraulic system malfunctions and corresponding financial losses will customers face if they select low-grade inferior seal kits instead of this complete multi-material composite set?
A: Cheap inferior seal kits only utilize recycled low-grade ordinary NBR raw materials, without matching special arched PU buffer rings and carbon-filled PTFE anti-extrusion protective layers. After short-duration variable-speed rotary friction and silt corrosion, the thin rotary shaft sealing lip will crack and wear rapidly, triggering internal hydraulic oil bypass and slow external oil seepage of the steering motor assembly. The bulldozer will exhibit stiff steering response, unbalanced left-right turning sensitivity, weak pivot steering power and obvious medium-frequency hydraulic humming vibration noise during driving. Worn rubber and plastic debris will scratch the precision polished rotary shaft and motor housing inner bore, requiring costly full replacement of integral metal steering motor core components. Meanwhile, persistent slow oil seepage increases daily hydraulic oil consumption costs, and prolonged equipment shutdown will delay overall construction project schedules, bringing extra labor rental and operation loss expenses for customers.

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