Hitachi-(1010956;FT3061;1028494)EX400/JD370 sprocket rim assembly/heavy duty excavator crawler part manufacture/drive sprocket ass'y supply/china sprocket factory direct

Product Specifications

(1010956;FT3061;1028494)EX400 final drive sprocket assembly is a critical undercarriage component for Hitachi/FIAT-HITACHI/JOHN Deere 40 ton-series excavators (also compatible with some Sumitomo SH400 and CAT 400-class models). Here's a detailed technical and commercial breakdown.

 EX400 Final Drive Sprocket Assembly Specifications

• Function: Transmits power from final drive to track chain

• Compatible Models:

  • Hitachi EX400-1/3/5/6

  • Sumitomo SH400-1/3/5

  • Caterpillar M318/M322 (with adapter kits)

• Key Components:

  • Segmented sprocket rim (27-29 teeth)

  • Planetary gear set

  • Output shaft with splines

  • Multi-lip seal kit

  • Bearing housing

Maintenance Warning Signs

⚠️ Replace Immediately If:

• Teeth are "hooked" (>30% wear)

• Oil leaks past seals

• Grinding noises during operation

• Track "skipping" occurs

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