Final drive or travel motor? The two are sold together often enough that the names blur. The travel motor converts hydraulic flow into rotation; the final drive — the travel device — is the reduction gearbox that multiplies torque into the sprocket. This page covers the gearbox assemblies; complete motor-and-gearbox units are on the travel motor page. The pages cross-link deliberately, and the documented listings below state which assembly each number covers.
Documented listingsDocumented Final Drive Listings
| Part number | Part | Compatible with | Machine models |
|---|---|---|---|
| 169-5558 / 169-5563 / 200-3488 | Travel device final drive | Caterpillar | E345D, E349E, E349D2 |
| 191-2619 / 169-5569 / 296-4651 | Travel device final drive | Caterpillar | E312D, E318D, E311D, E312E, E314D |
| 170401-00009M / 170401-00009L / 170401-00009H / 170401-00120 | Final drive | Doosan | DX500 LCA, DX520 |
| 157-5072 | Travel gearbox (documented for Caterpillar dozers) | Caterpillar | D8R, D8N, D8 |
Why Final Drives Fail
The classic final drive failure is quiet: the gear oil level drops or the oil is never changed, the planetary gears and bearings wear, and the first symptom is metallic debris on the magnetic plug or a growl under load. Seal failure at the sprocket face lets oil out and dirt in. Because the gearbox is sealed and stressed, most buyers replace the assembly rather than rebuild it on site. The gearbox is a separate assembly: it is quoted as a replacement by its documented number, not as a repair item. Where the fault is in the motor rather than the drive, a repair route exists for the motor: the hydraulic repair solution names travel motors among the components it refits, rebuilds and tests.
- Send the number from the drive's cover or plate, plus machine model — the cross-references above show how many numbers one assembly can carry.
- Say which side (left/right) and whether the motor is needed too, or the gearbox alone.
- Report the failure honestly — no drive, noise, or leakage — it changes whether the reply quotes a drive, a motor or both.
Delivery and preparation times are confirmed for your order in the enquiry reply, in writing and before payment: the reply states the times, the packing and the shipping method that apply to your exact part number. Times are confirmed per order rather than published as a general figure, because they follow the listing, the quantity and the destination.
Frequently Asked Questions
Is the travel motor included with a final drive?
Only where the listing says so. The documented listings above are travel device (gearbox) assemblies; combined motor-and-drive units are listed on the travel motor page. The enquiry reply states exactly what the number covers.
Can I buy one side only?
Yes — final drives are priced and shipped per side. State left or right as seen from the operator's seat, or send a photo to remove the doubt.
Do the parts carry a warranty?
Warranty terms are confirmed in writing for each order before payment. Kyotechs' own FAQ states that most parts are backed by a warranty against manufacturing defects; ask for the term that applies to your listing when you enquire.
Protecting the Replacement
Most final drives die of neglected oil, so a replacement fitted into the same maintenance pattern has a short life ahead of it. Three habits protect the new unit: change the gear oil at the interval the machine maker specifies (and immediately after any water contamination), check the magnetic plug at every service and treat metal on it as a stop-and-inspect signal, and keep the sprocket-side seal area clean so grit is not fed into the seal. None of this is exotic — it is the difference between a final drive that lasts the machine's remaining life and one that returns as a warranty argument. The enquiry reply can include the oil specification recorded for your drive if you ask when ordering.