443-4084 4434084 Transmission Shaft Oil Seal Service Kit for Large Mining Wheel Dozer 426 F2 428F2

1. Quick Details of  seal 443-4084:

2. 443-4084 picture:

3. Service part number :

4. FAQ

Q: What four different raw materials make up all sealing parts inside this maintenance kit?
A: The full set consists of hydrolysis-resistant HNBR, graphite modified PTFE, high-temperature resistant AEM rubber and thick multi-layer felt composite fabric for outer dustproof assembly.

Q: What natural original color does each sealing accessory feature without extra artificial pigment?
A: HNBR main oil seals are deep matte black, graphite-filled PTFE auxiliary rings are dark iron gray, AEM rubber fittings are pale beige, composite felt dust seals are light taupe brown.

Q: What core sealing role does HNBR play on the dozer’s rotating transmission shafts?
A: As primary lip sealing material, HNBR relies on steady compression resilience to block transmission gear oil leakage while drive shafts keep continuous high-speed rotation under heavy mine pushing loads and fluctuating working pressure.

Q: What is the design purpose of matching graphite-filled PTFE as inner lining beside HNBR sealing lip?
A: It forms a low-friction contact layer against metal shaft surface, reducing frictional heat generation and preventing HNBR lip from premature wear caused by fine mineral dust invading the shaft clearance in harsh mining environments.

Q: What prominent performance edges does AEM rubber hold compared with regular common NBR rubber?
A: AEM boasts outstanding resistance against thermal ageing and oxidation deterioration, retaining stable sealing tightness after long-term contact with high-temperature oxidized gear oil inside overloaded transmission housings.

Q: At which specific installation spots are AEM oil seals generally assembled on equipment?
A: AEM components are mostly fitted at high-heat working positions including final drive hub and transmission input shaft where lubricating oil keeps running under persistent high operating temperature.

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