Typ 338 pins down the exact version of your Fendt 311 Vario. More than 450 parts are listed here, from lighting and electrics to steering and the front axle.
A tractor that will not start first thing, or a hitch that no longer holds its height, stops work on the spot. For the Fendt 311 Vario with Typ 338 on the type plate, this page lists more than 450 parts, including the ones that matter for exactly those faults: starter motors, alternators, a potentiometer for the linkage and bushes for the hydraulic cylinder.
There are also LED work lamps and rotating beacons with holders, push button and rocker switches, windscreen gas struts, grab handles, rubber floor mats, seals, O-rings such as the tank O-ring, and connector heads for the trailer brake line. Brands include GRANIT, HELLA, Wabco, Walterscheid and PROBOSS.
The potentiometer tells the electronics where the lift arms are. Once it wears, the hitch starts to jerk, hunts around its set position or stops responding cleanly to the controls. Before you undo the old one, scribe a line across the shaft and the bracket so the new part goes back in the same position. Afterwards check the top and bottom limits with no load on the arms, and recalibrate the hitch control if the end positions are out. Always work with the arms lowered and no implement attached.
If the hydraulic cylinder weeps at its pivot or shows visible play in its eyes, look at the bushes. A worn bush loads the cylinder off-centre, and over time that takes its toll on the seals inside the cylinder as well.
Before swapping a starter motor or alternator, always disconnect the battery negative first. The heavy starter cable stays live even with the ignition off, and a spanner touching earth will throw a big spark. Lay the old and new units side by side and compare the direction of rotation, the number of teeth on the pinion and the position of the terminals before you bolt anything in.
This page only shows what is recorded for Typ 338. If your 311 Vario carries a different Typ number, the matching page will help: Typ 324, Typ 348 or Typ 351. The Fendt 311 Vario page groups all versions together. For a starter motor or alternator, the plate on the old unit also helps, as it carries a reference number that makes matching straightforward.
The other models in this line have their own parts pages, such as the Fendt 309 Vario, the Fendt 310 Vario, the Fendt 312 Vario, the Fendt 313 Vario and the Fendt 314 Vario. For everything from the brand, go to Fendt parts.