Views: 0 Author: BN GEAR Publish Time: 2026-07-31 Origin: Site
When a Caterpillar excavator's final drive fails, every hour of downtime costs money. Whether you run an E312C, 320D, or 336D, finding the right replacement quickly — without overpaying at the dealership — is critical.
This guide covers everything you need to know about replacing a CAT excavator final drive, including OEM part numbers, aftermarket alternatives, cost expectations, and compatibility.
Here are the most frequently replaced CAT final drive part numbers:
| OEM Part No. | Compatible Models | BN Gears Aftermarket |
|---|---|---|
| 191-2619 | E312C, 312C, E313C, E313D, E314C | 191-2619 CAT Final Drive → |
| 267-6796 | 320D, 323D, 325C, 325D, 329D | 267-6796 CAT Final Drive → |
| 353-0562 | E336D | 353-0562 E336D Final Drive → |
| 507-6562 | 320D2, 318, 323D2, 320E, 323, 325 | 507-6562 CAT Final Drive → |
| 7Y1571 | 320, 320L, 320N | 7Y1571 CAT Final Drive → |
Don't see your part number? Browse our full CAT Excavator Final Drive catalog with 200+ compatible models.
Aftermarket vs OEM CAT Final Drives
Factor OEM (CAT Dealer) Aftermarket (BN Gears) Price $$$$ (premium) $$ (30-50% savings) Warranty 6-12 months 12 months Availability May require lead time Stock available for popular models Quality OEM spec ISO 9001 certified, case-hardened gears Aftermarket final drives from a certified manufacturer like BN Gears deliver the same performance at a fraction of the cost. Our planetary gears are case-hardened with dual-cone floating seals — same engineering standards as OEM.
How Much Does a CAT Final Drive Cost?
Costs vary significantly by model size:
Mini excavators (E312, 313 series): 1,500−1,500−3,000 aftermarket
Mid-size (320, 323 series): 2,500−2,500−5,000 aftermarket
Large (336, 349 series): 4,000−4,000−8,000+ aftermarket
Aftermarket replacements typically save 30-50% compared to CAT dealer pricing. Contact us for a precise quote on your specific model.
How to Choose a CAT Final Drive Supplier
Look for these 3 things:
ISO 9001 certification — ensures consistent manufacturing quality
Warranty — minimum 12 months
Model coverage — the more models covered, the more specialized the manufacturer
BN Gears (Hongxiang Machinery) has been manufacturing aftermarket final drives since 2000, with ISO 9001 certification and coverage for 600+ excavator models across 17 brands including CAT, Komatsu, Hitachi, and Volvo.
