SERVICE MANUAL 9. Align  the  marks  made  during  disassembly  (Fig. 11)  on   the   back   plate   (12)   with   those   on   the center housing (20) and carefully install the back plate over the shaft and thrust collar.  Be careful not  to  damage  the  seal  ring  when  engaging  the thrust collar into the bore in the back plate.  The back  plate  is  easily  installed  if  the  open  side  of the seal ring is engaged into the back plate bore first. 10. Install  the  capscrews  (22)  and  lock  plates  (21). Torque  the  capscrews  to  specified  torque  and bend  the  lock  tabs  on  the  lock  plate  to  secure the screws (see TORQUE CHART). 11. Slip  the  compressor  wheel  (11)  onto  the  shaft. Apply a small amount of clean engine oil on the threads  and  washer  face  of  the  lock  nut  (10). Install the lock nut finger tight. 12. Carefully place the assembled center housing in a vise equipped with brass jaws; clamping on the hex on the end of the turbine wheel. 13. Tighten    the    lock    nut    (10)    using    a    double universal   joint   to   avoid   side   load   which   could cause    the    shaft    to    bend.        Upon    reaching specified   torque   tighten   an   additional   1/4   turn (see TORQUE CHART). 14. Remove the assembly from the vise and spin the wheels by hand.  The wheels must rotate freely; insure the turbine wheel does not rub the shroud (24). 15. Align  the  marks  made  during  disassembly  (Fig. 11)   on   the   center   housing   with   those   on   the turbine housing.  Carefully install the turbine end of the center housing into the turbine housing. 16. Coat the threads of the capscrews (4) with anti- seizing  compound.    Install  the  clamps  (2),  lock plates    (3)    and    capscrews    (4).        Torque    the capscrews to specified torque and bend the lock tabs on the lock plates to secure the capscrews (see TORQUE CHART). 17. Align   the   marks   (Fig.   11)   on   the   compressor housing  with  those  on  the  center  housing  and back   plate.      Carefully   install   the   compressor housing  and  secure  with  capscrews  (6),  clamps (8) and lock plates (7).  Torque the capscrews to specified  torque  and  bend  the  lock  tabs  on  the lock    plates    to    secure    the    capscrews    (see TORQUE CHART). 18. Push   the   shaft   as   far   as   possible   from   the turbine     end     and     check     for     binding     during rotation. Repeat check, pushing from compressor   end.   The   shaft   must   rotate   freely with    no     interference     at     either     end     of     the turbocharger. 19. If     the     turbocharger     is     not     to     be     installed immediately, lubricate internally and install protective covers on all openings. 20. Install the turbocharger on the engine according to the specified "Engine Service Manual." CTS-4104 PRINTED IN UNITED STATES OF AMERICA Page 16