T R O U B L E S H O O T I N G POWER TRAIN TROUBLESHOOTING TM  5-3805-258-24-1 P  O  W  E  R      T  R  A  I N Use this as a reference for the location and correc- tion of problems in the power train. When more checks are necessary, use the 5P6225 Hydraulic Test Box. Locations of the pressure taps and procedures for tests and adjustments are given in the 950B POWER SHIFT TRANSMISSION TESTING AND ADJUSTING. Always make visual checks first, operation checks second,  and  instrument  checks  third. VISUAL  CHECKS 1. 2. 3. 4. 5. 6. 7. 8. Check the oil level in the differentials. Check the oil level in the output transfer gear case. Check all oil lines, hoses and connections for leaks or damage. Check all external valves for leaks or damage. Check for oil on the ground under the machine. Check the transmission control linkage for dam- age and/or adjustment. Let the oil out of the housing for the transmission oil  filter.  Remove  and  check  the  filter  element for foreign mterial. a. Shiny steel particles give the indication of wear and/or failure in the oil pump. b.  Aluminum  particles  give  the  indication  of  a failure  in  the  torque  converter. c. Rubber particles (seal or hose material) give the indication of a hose or seal failure. d. A heavy accumulation of black rubber mater- CHECKS DURING OPERATION e. ial on the filter element gives the indication of worn clutch discs in the transmission. Iron or steel chips give the indication of bro- ken components in the transmission, torque converter  or  transfer  gears. Let the oil out of the case for the output transfer gears. Remove and check the magnetic screen for foreign material. a. Iron or steel chips give the indication of bro- ken components in the transmission, torque converter  or  transfer  gears. b. Aluminum chips give the indication of a fai- lure  in  the  torque  converter. c.  Rubber  particles  (seal  or  hose  material)  give the indication of a hose or seal failure. d.  Rubber  pieces  (transmission  clutch  disc  ma- terial) give the indication of a failure in the transmission  clutches. If you find rubber, aluminum, iron or steel parti- cles, all components of the hydraulic system must be washed clean. Do not use parts with damage. Use new parts. WARNING When checks are made while the machine is in operation,  make  sure  only  approved  personnel are on the machine. Keep other personnel off the machine and in view of the operator. Make sure checks are done in a open area. With  the  engine  running,  the  parking  brake “OFF” and the steering column toward the operator, move the transmission selection lever to all positions. The  transmission  must  engage  in  all  positions.  The machine must not move in NEUTRAL. The selection lever must stay in either FORWARD or REVERSE. With the engine running, the parking brake “ON” and  the  steering  column  toward  the  operator,  move the transmission selection lever to either the RE- VERSE or FORWARD position. The parking brake indicator light and the master fault light must come “ON” and the alarm must sound. Immediately re- lease the selection lever. The alarm must stop and the master  fault  light  must  go  “OFF”,  and  the  lever return to NEUTRAL. CAUTION With  the  parking  brake  ENGAGED,  move  the machine in case of an emergency only. Fire and damage to the parking brake can be the result if the machine is moved too far. 4-95