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 correct. Master cylinder OK. Master cylinder pressure switch OK. Voltage test. STE/ICE-R #89. POSSIBLE PROBLEMS REASON FOR QUESTION Transmission inching valve faulty. Wire 27A faulty. Relay R9 ground wire faulty. Wire 27 faulty. Wire 27B faulty. Relay R9 faulty. This question eliminates a possible    problem    or    group    of possible     problems     determining where troubleshooting continues. KNOWN INFO TEST OPTIONS Transmission temperature normal. Hom operates. Brake fluid level correct. Drive axle OK. Brake discs OK. Brake linkage adjustment correct. Master cylinder OK. Master cylinder pressure switch OK. Wire 27A OK. Relay R9 ground wire OK. Wire 27 OK. Wire 27B OK. Relay R9 OK. Voltage test. STE/ICE-R #89. POSSIBLE PROBLEMS REASON FOR QUESTION Transmission inching valve faulty. If  22  to  24  vdc  are  not  present, transmission     inching     valve     is faulty. ¬ ¬ 2-400