Views: 0 Author: Site Editor Publish Time: 2026-09-29 Origin: Site
Kubota is the world's largest manufacturer of mini excavators — the KX and U series are everywhere from North American rental fleets to European landscaping contractors. When a final drive fails on a Kubota, owners expect a replacement that fits perfectly the first time.
This guide covers Kubota excavator final drive replacement across the KX and U series: the models that matter, how to verify fitment, and how BN Gears supports owners.
Kubota's crawler excavator range includes the popular KX series (KX61, KX71, KX91, KX121, and larger KX models) and the U-series compact models (U17, U25, U55, and others). Specifications vary significantly between series and generations — the part that fits a KX91 will not fit a KX121 without verification.
The full model designation and generation (e.g., KX121-3 vs KX121-5)
The machine serial number
The OEM part number stamped on the travel motor or gearbox if available
Sprocket hole and frame hole counts on the current unit
Whether the travel motor is still serviceable — a gearbox-only replacement keeps costs down
Kubota mini excavators use proven hydraulic travel motor platforms shared across the industry. BN Gears supplies aftermarket travel motors and components across the most common motor brands used on compact machines:
BN Gears (Hongxiang Machinery) has manufactured travel and swing reducers since 2000, covering 600+ construction machinery models, with a strong line of compact excavator final drives. If your Kubota model is not yet in the standard catalog, the engineering team evaluates compatibility and can develop new fits on request.
ISO 9001:2015 certified, 18,000 m² factory in Jiangmen, China
Case-hardened forged alloy steel gears with controlled heat treatment
Complete assemblies or individual components (sun shafts, gears, seals)
Worldwide shipping; stock units processed within 4–7 days
Check final drive oil level every 250 operating hours
Change gear oil every 1,000 hours (or per manufacturer spec)
Inspect seals daily — compact machines work in mud, dust, and water often
Address grinding noise, track slippage, or oil leaks early
