This repair kit contains the seals, gaskets, and internal components needed to restore the air valve in the pneumatic system of the host tractor. The air valve controls the flow of compressed air to actuators that engage or disengage auxiliary functions. A leaking or sticking valve causes slow or incomplete actuation of the connected implement. The kit is manufactured by AGCO to match the original valve body geometry and seal groove dimensions, ensuring the valve spool moves freely without bypass leakage. On reassembly, lubricate the new seals with pneumatic-system grease and verify the valve opens and closes without binding.