English to Lithuanian Tech/Engineering Engineering (general) Stair units

Aprašoma keleivių įlaipinimo (išlaipinimo) trapo važiuoklė:

The stair unit is steered via a turntable mounted fore carriage and towbar. The towbar operates the drum brake on the front track axle wheels and ensures safe control of the stair unit at all times.
At the rear, two un-braked stub axles are welded to the main chassis frame. At the front, the chassis is supported by a braked track axle.

Kaip reikėtų išversti "braked track axle"? ašis su stabdžiais?