07010-00090 0701000090 HNBR PU FKM Graphite Infused PTFE Multi-Material Composite Oil Seal Kit for Bulldozer Auxiliary Charge Pump Complete Servicing

1. Quick Details of  seal 07010-00090:

2. 07010-00090  picture:

3. Service part number :

4. FAQ

Q: What wide temperature range and constant low-flow 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 low-flow working pressure up to 465 bar, and withstand instantaneous tiny peak impact pressure up to 525 bar without micro 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 micro O-rings can operate reliably within -26°C ~ +148°C, perfectly matching the mild high-temperature hydraulic oil circulation state of non-stop full-load earthmoving in summer. Graphite-infused PTFE backup rings will not soften or deform under medium-speed constant rotary friction and persistent high temperature, maintaining consistent anti-leakage protective performance through all seasonal construction environments.

Q: What hidden low-pressure 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 concave circular PU micro buffer rings and graphite-infused PTFE anti-extrusion protective layers. After short-duration constant medium-speed rotary friction and silt vapor corrosion, the thin rotary shaft sealing lip will crack and wear rapidly, triggering internal hydraulic oil bypass and continuous slow micro oil seepage of the auxiliary charge pump assembly. The bulldozer will exhibit delayed brake response, stiff pilot handle manipulation, insufficient torque converter pre-charge pressure and obvious low-frequency hydraulic humming micro vibration noise during driving and pushing work. Worn tiny rubber and plastic micro debris will scratch the precision polished rotary shaft and pump housing inner micro bore, requiring costly full replacement of integral metal charge pump core components. Meanwhile, persistent slow micro 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.

Q: What detailed standardized delicate installation operation specifications and strictly prohibited operations should maintenance staff follow to extend the maximum service life of this 07010-00090 auxiliary charge pump seal kit?
A: First, use ultra-fine micron water sandpaper to polish the rotary shaft outer surface, pump housing inner micro bore and static sealing mounting flat surfaces, thoroughly clear old micro seal residues, metal micro burrs, mud and ultra-fine silt mixed micro abrasive impurities. Second, evenly coat all delicate micro sealing components with brand-new clean anti-wear hydraulic oil for lubrication; thick grease mixed with metal iron filings is strictly forbidden, as hard micro particles will scratch the HNBR dual-lip rotary sealing lip during constant medium-speed rotation. Third, install every rotary shaft seal in the designated fixed orientation: the sharp sealing lip must face the internal high-pressure hydraulic oil chamber side, reversed installation will directly cause continuous slow micro oil seepage after assembly completion. Fourth, lay the graphite-infused PTFE backup ring completely flat without bending, folding or micro warping before fitting the main HNBR rotary shaft seal into the pump housing installation groove. Fifth, after finishing full seal assembly, manually rotate the charge pump shaft hundreds of constant cycles at low pre-charge pressure to inspect all sealing positions for micro oil seepage before reinstalling the auxiliary charge pump onto the bulldozer and putting the machine back into full-load earthmoving production.

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