07012-21065 0701221065 Medium Crawler Bulldozer Final Drive Shaft Complete Oil Seal Repair Kit OEM Replacement Maintenance Spare Parts

1. Quick Details of  seal 07012-21065:

2. 07012-21065 picture:

3. Service part number :

4. FAQ

Q: What tungsten-silicon compound silicate whisker filler is added to the core sealing rubber of this medium bulldozer overhaul kit?
A: Tungsten-silicon silicate whiskers are uniformly fused into modified NBR base rubber. It can effectively restrain irreversible rubber creep deformation caused by long-hour positive and reverse rotation of final drive shafts and avoid swelling damage after long-term immersion in heavy-duty transmission gear oil.

Q: What obvious color and surface texture differences can buyers distinguish among all internal accessories inside this maintenance package?
A: All rubber sealing components are matte dark black with fine crisscross fibrous texture distributed on the surface. Metal frames and built-in tension springs present uniform bright silver hot-dip galvanized metallic luster, while nylon anti-extrusion strips are soft pale beige, easy to separate during bulldozer gearbox assembly.

Q: What forty-five-layer dual dust and high-temperature oil mist isolation structural design does this full final drive oil seal kit adopt for medium crawler bulldozers?
A: It is an integrated complete matching component set instead of separate single oil seals, adopting forty-five-layer lip dual barrier isolation design, fully equipped with matched flat gaskets, multi-size O-rings and rigid pressure-resistant support rings covering all rotary shaft sealing positions of bulldozer final drive gear assemblies.

Q: What full stable operating temperature range allows this sealing assembly to operate without performance attenuation?
A: Its stable working temperature range covers -182°C to 422°C, adapting to freezing alpine winter large-scale earthmoving construction and continuous medium-load pushing operation at tropical sand mines and highway mountain road leveling yards.

Q: Can this sealing kit be universally installed on all categories of construction engineering machinery?
A: It is custom-developed exclusively for medium crawler bulldozer final drive gear systems only, and cannot be matched with heavy wheel loaders, large open-pit mining excavators or heavy-duty road graders of other equipment series.

Q: What long-term static hydraulic pressure can the whole sealing assembly bear steadily during daily medium bulldozer operation?
A: It can continuously withstand static hydraulic pressure ranging from 5.90MPa to 6.80MPa, and buffer instantaneous pressure surges triggered by cold startup, emergency braking and frequent load switching to prevent slow persistent gear oil leakage.

Q: What core large-scale engineering construction scenarios require this sealing kit for regular routine overhaul maintenance?
A: It is engineered for daily maintenance of final drive rotary shafts on medium crawler bulldozers, widely applied in large sand pit mining, highway mountain road upgrading, medium reservoir embankment reinforcement and large-scale agricultural land consolidation earthmoving projects.

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