The Tractor:
A John Deere 5400 Tractor, Serial No.: 5400542074 Engine Model 3029TLV01
Engine Serial No.: 3029247613 Year of manufacture: 1996. Made in USA. 9 Forward and 3 Reverse gears.
The problem:
While driving, the tractor stops spontaneously as if the brakes of both wheels where locked...