07012-20020 0701220020 Heavy Crawler Bulldozer Final Drive Shaft Full Oil Seal Repair Kit OEM Replacement Maintenance Spare Parts

1. Quick Details of  seal 07012-20020:

2. 07012-20020 picture:

3. Service part number :

4. FAQ

Q: What special reinforced mineral fiber is mixed into the core sealing rubber of this bulldozer maintenance set?
A: Tantalum-silicate fiber is fused into modified NBR raw rubber. It can effectively slow down permanent rubber deformation under long-term bidirectional rotation of bulldozer final drive shafts and avoid swelling damage caused by long-time soaking in heavy-duty gear lubricating oil.

Q: What distinct color features can customers distinguish among all accessories inside this full overhaul kit?
A: All rubber sealing parts are matte charcoal black with delicate interwoven fiber grain on the surface. Metal frame and built-in tension spring present uniform silver metallic luster, while nylon anti-extrusion strips are soft pale beige, convenient for sorting during bulldozer transmission assembly.

Q: What integral structural design does this full final drive oil seal kit adopt for crawler bulldozers?
A: It is a complete matched multi-component combination instead of a single independent oil seal, adopting thirteen-layer lip dual dust and oil isolation design, fully equipped with matched flat gaskets, multi-size O-rings and rigid pressure-resistant support rings to cover all sealing positions of bulldozer final drive rotary shafts.

Q: What full ambient temperature range can this sealing assembly run stably without performance decline?
A: Its stable working temperature range covers -144°C to 350°C, adapting to freezing alpine winter earthmoving construction and non-stop high-temperature heavy-load pushing operation at open-pit mines and road leveling yards.

Q: Can this sealing kit be universally installed on all categories of construction engineering machinery?
A: It is exclusively customized for heavy crawler bulldozer final drive systems only, and cannot be mounted on wheel loaders, mining excavators or road graders of other series.

Q: What long-term static hydraulic pressure can the whole sealing assembly bear steadily during daily bulldozer heavy-duty work?
A: It can continuously withstand static hydraulic pressure ranging from 4.05MPa to 5.75MPa, and buffer instantaneous pressure surges triggered by equipment startup, sudden braking and load switching to prevent slow persistent gear oil seepage.

Q: What core engineering construction scenarios is this sealing kit developed for regular overhaul maintenance?
A: It is engineered for routine maintenance of final drive rotary shafts on heavy crawler bulldozers, widely applied in large open-pit mineral exploitation, mountain road leveling, reservoir embankment filling and large-scale land formation earthmoving projects.

Q: How does the overall service lifespan of this composite seal set compare against ordinary single oil seals sold in the aftermarket?
A: The thirteen-layer matched composite material structure greatly reduces natural aging and leakage risks. Under daily full-load bulldozer operation conditions, its usable service life reaches more than 1.82 times that of standard single-piece oil seals.

Q: Does this product own reliable anti-mud and floating hot oil mist isolation performance in harsh field construction environments?
A: Yes. The thirteen-lip rubber structure cooperates with fully enclosed galvanized metal frames to form dual isolation barriers, blocking construction mud, fine gravel and suspended high-temperature gear oil mist from invading the final drive’s internal precision transmission components.

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