TM 10-3930-669-20 1.  SERVICE BRAKES DO NOT APPLY OR APPLY SLOWLY (CONT). KNOWN INFO TEST OPTIONS Transmission temperature normal. Hom operates. Brake fluid level correct. Drive axle OK. Brake discs OK. Brake linkage adjustment check. POSSIBLE PROBLEMS REASON FOR QUESTION Brake linkage adjustment incorrect. Master cylinder faulty. Master cylinder pressure switch faulty. Transmission inching valve faulty. Wire 27A faulty. Relay R9 ground wire faulty. Wire 27 faulty. Wire 27B faulty. Relay R9 faulty. If    brake    linkage    adjustment    is incorrect, brake linkage is faulty. ¬ 2-394