TM 5-3825-226-24 PROBLEM PROBABLE CAUSE RECOMMENDED CORRECTIVE ACTION Transmission does not shift. 1. Low oil pressure. a. Check oil pressure, adjust as necessary. 2. Air leaks on inlet side of pump. a. Repair or replace pump. 3. Control linkage loose or adjustment not correct. a. Check control linkage for proper adjustment. Transmission   engages   very   suddenly   (rough shifting). 1. Primary setting of the relief valve not correct. a. Correct primary setting of the relief valve. 2. Adjustment of control linkage not correct. a. Check control linkage for proper adjustment. 3. Operation   of   load   piston   or   differential   and safety valve not correct. a. Repair  or  replace  load  piston/differential/ safety valve as necessary. 4. Valve springs are weak or have damage. a. Replace valve springs. Shifts slowly. 1. Low oil pressure. a. Check oil pressure, adjust as needed. 2. Adjustment of control linkage not correct. a. Check control linkage for proper adjustment. 3. Air leaks on inlet side of pump. a. Repair or replace pump. PROBLEM PROBABLE CAUSE RECOMMENDED CORRECTIVE ACTION 4. Operation   of   load   piston   or   differential   and safety valve not correct. a. Repair  or  replace  load  piston/differential and safety valve. 5. Orifice in modulation relief valve not open. a. Repair or replace modulation relief valve. Transmission  engages  but  the  machine  does  not move and the engine stops. 1. The gears in the transmission cannot turn. a. Parking brake is on. b. Planetary   in   the   final   drive   has   broken gears and cannot turn. c. Differential  has  broken  gears  and  will  not turn. d. Too many transmission clutches are being engaged in the transmission. 1. Release parking brake. 2. Replace planetary in the final drive. 3. Replace differential. 4. Repair or replace transmission clutches as necessary. Loss of power during or after a shift. 1. Two or more clutches wrongly engaged. a. Repair or replace clutches as necessary. Pump noise is not normal. 1. Loud   sounds   at   short   intervals   that   give   an indication  that  particles  are  going  through  the pump is caused by pump cavitation (the sudden making   of   low   pressure   bubbles   in   a   liquid). Cavitation  is  caused  by  a  restriction  or  an  air leak in the inlet line to the pump. a. Repair or replace pump. 2. A  constant  loud  noise  is  an  indication  of  pump failure. a. Repair or replace pump. 2-101