07012-21068 0701221068 Medium Crawler Bulldozer Final Drive Shaft Complete Oil Seal Repair Kit OEM Replacement Maintenance Spare Parts

1. Quick Details of  seal 07012-21068:

2. 07012-21068 picture:

3. Service part number :

4. FAQ

Q: What zirconium-silicon composite mineral whisker filler is added into the core sealing rubber of this medium bulldozer overhaul kit?
A: Zirconium-silicon silicate whiskers are evenly blended into modified NBR base rubber. It effectively suppresses irreversible rubber creep deformation caused by long-duration forward and reverse rotation of final drive shafts and avoids permanent swelling deformation after long-time soaking in heavy-duty transmission gear lubricant.

Q: What distinct color and surface texture differences can buyers quickly identify among all accessories inside this maintenance kit?
A: All rubber sealing fittings are matte deep grey-black with delicate crisscross fibrous grain spread over the surface. Metal frames and built-in tension springs display uniform bright silver hot-dip galvanized metallic luster, while nylon anti-extrusion strips are soft pale light yellow, easy to sort during bulldozer final drive assembly work.

Q: What forty-six-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 a complete matched multi-component assembly instead of separate single oil seals, adopting forty-six-layer lip dual barrier blocking 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 stably without performance decline?
A: Its stable working temperature range spans -183°C to 424°C, adapting to freezing alpine winter large-scale earthmoving construction and uninterrupted medium-load pushing operation at tropical sand mines and highway mountain road paving yards.

Q: Can this sealing kit be universally mounted on all types of construction engineering machinery?
A: It is tailor-made exclusively for medium crawler bulldozer final drive gear systems only, and cannot be matched with heavy wheel loaders, large 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 5.95MPa to 6.85MPa, and buffer sudden pressure spikes triggered by cold startup, emergency braking and frequent load conversion to prevent slow persistent gear oil leakage.

Q: What core large-scale engineering construction scenes 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 exploitation, highway mountain road upgrading, medium reservoir dike reinforcement and large-scale farmland consolidation earthmoving projects.

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