Brakes
Japan
Published 2 Jul 2026
Ref JP-2107170
Yanmar: YT5114S — Computer (Power Transmission)
Translated from Japanese · machine translation
- Country
- Japan
- Published
- 2 Jul 2026
- Units affected
- 39
- Reference
- JP-2107170
Affected vehicles
Yanmar YT5114S 2026
Hazard
In the power transmission system of an agricultural tractor, due to insufficient review of the control software, when the brake is applied after the system has automatically switched from four-wheel drive to two-wheel drive, it should return to four-wheel drive and provide four-wheel braking; however, since it does not switch to four-wheel drive until decelerating to a set speed, two-wheel braking remains and the braking distance may increase.
Show original (日本語)
農耕用トラクタの動力伝達装置において、制御ソフトの検討が不十分なため、４輪駆動から自動で２輪駆動に切り替わった状態でブレーキを踏むと、４輪駆動に復帰して４輪制動になるべきところ、設定速度に減速するまで４輪駆動に切り替わらないため、２輪制動のままとなり、制動停止距離が伸びるおそれがある。
Remedy
On all vehicles, rewrite the control unit software with the improved software.
Show original (日本語)
全車両、制御コントローラのソフトを改善ソフトに書き換える。