07010-00050 0701000050 HNBR PU FKM PTFE Multi-Material Composite Oil Seal Kit for Bulldozer Steering Pump Maintenance D50S-10

1. Quick Details of  seal 07010-00050:

2. 07010-00050  parts on group :

3. 07010-00050  picture:

4. Service part number :

5. FAQ

Q: What distinct color and structural characteristics allow maintenance staff to quickly distinguish each component inside this steering pump seal kit at a glance?
A: HNBR rotary shaft and piston main seals are matte deep black with triple-lip sealing structure, the contact lip surface undergoes precision mirror polishing without burrs or scratches. PU buffer rings are light apricot yellow with exclusive wedge-shaped shock absorption outline, visually distinguishable from flat buffer rings used on tilt, ripper, track adjuster or final drive cylinders. FKM static O-rings are dark coffee brown with uniform circular cross-section, no shrinkage or permanent deformation after long-term storage. Carbon-filled PTFE anti-extrusion rings are off-white with evenly distributed tiny black carbon particles on the surface, easy to tell apart from pure white unfilled PTFE rings. The external heavy-duty mud wiper is black with dual scraping lips; the outer thick lip blocks large mud clumps and gravel, while the inner fine lip filters tiny abrasive dust particles. Each accessory is printed with clear size specifications on the surface for fast sorting and matching during on-site assembly.

Q: What wide temperature range and extreme hydraulic pressure working conditions can this four-material composite seal kit sustain for long-term stable operation?
A: This integrated oil seal kit can continuously bear stable long-term working pressure up to 425 bar, and withstand instantaneous peak impact pressure up to 490 bar without extrusion failure of sealing components. HNBR and PU accessories retain stable elasticity and sealing performance within -38°C ~ +122°C, fully adapting to low-temperature frozen mountain construction in winter. FKM O-rings can operate normally within -26°C ~ +145°C, matching the high-temperature hydraulic oil circulation state of continuous full-load earthmoving in summer. Carbon-filled PTFE backup rings will not soften or deform under high-speed rotary friction and high temperature, maintaining consistent anti-leakage protection performance all year round.

Q: What chain of hidden mechanical faults and corresponding economic losses will customers face if they select low-quality inferior seal kits instead of this complete multi-material set?
A: Cheap inferior seal kits only adopt recycled ordinary NBR raw materials, without matching PU buffer rings and carbon-filled PTFE anti-extrusion protective layers. After short-term rotary friction and mud corrosion, the sealing lip will crack and wear rapidly, triggering internal hydraulic oil bypass and external oil leakage of the steering pump assembly. The bulldozer will suffer slow steering response, stiff turning operation and abnormal metal squeaking noise during walking. Worn rubber and plastic debris will scratch the polished pump rotary shaft and pump housing inner wall, requiring expensive replacement of metal pump core components. Meanwhile, frequent oil leakage increases daily hydraulic oil consumption, and long-term equipment shutdown will delay overall construction progress, bringing extra labor cost and operation loss for customers.

Q: What detailed standardized installation operation specifications and forbidden operations should maintenance staff strictly follow to maximize the service life of this 07010-00050 steering pump seal kit?
A: First, use fine water sandpaper to polish the piston outer groove, pump housing inner wall and rotary shaft surface, thoroughly remove old seal residues, metal burrs, mud and gravel mixed abrasive impurities. Second, evenly coat all sealing components with brand-new clean hydraulic oil for lubrication; thick grease mixed with metal iron filings is strictly forbidden, as hard particles will scratch the HNBR sealing lip during high-speed rotation. Third, install every seal in the designated direction: the sharp sealing lip must face the high-pressure hydraulic oil chamber side, reverse installation will directly cause immediate oil leakage after assembly. Fourth, lay the carbon-filled PTFE backup ring flat without bending or warping before installing the main HNBR piston seal. Fifth, after finishing all seal assembly, rotate the steering pump shaft manually dozens of times at low pressure to check all sealing positions for oil leakage before installing the pump back on the bulldozer and putting the machine into full-load earthmoving operation.

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