J.  Assembly of PTO Unit (On Cases so Equipped) Refer to Illustration on Page PM12 1. Put  shift  fork  (Item  59)  into  housing  (Item  61)  with the chamfered side of the shift shaft hole toward the two  opening  ends  of  the  housing,  put  clutch  collar (Item  60)  into  the  housing  (with  the  chamfered  end pointing  as  indicated  and  into  the  forked  section  of the shift fork. 2. Install  the  shift  shaft  (Item  49  on  Page  PM13)  or (Item 53 on Page PM14).  Install locknut (Item 47 on Page   PM13   or   PM14).      Restrain   nut   with   a   box wrench and turn the shaft with an open end wrench. 3. Press  bearing  cones  (Item  64)  onto  shaft  (item  65). Press  seal  (item  69)  into  bearing  carrier  (Item  67). Press one cup (Item 63) into carrier. 4. Install  shaft  (Item  65)  with  bearing  cones  into  the carrier  sub-assembly  and  install  the  second  bearing cup (Item 63). 5. Install  the  bearing  carrier  shaft  assembly  onto  the housing (Item 61) with the shaft passing into the shift collar.    Temporarily  bolt  the  carrier  to  the  housing. With   bolts   (Item   68)   tightened   to   15   ft.      lbs.      , measure   gap   between   the   parts.      Select   a   shim stack that measures .005 to .010 larger than the gap measurement. Fig.  37 6. Remove  bolts  (Item  68),  install  shim,  reinstall  bolts with   Permatex   on   their   threads.      Tighten   to   the specified torque.  Skip to J8 if case is equipped with an air operated PTO shift. 7. Refer to Page PM14.  Install the manual shift linkage as follows: a. Oil   and   install   o-ring   (Item   3)   on   seal   carrier (Item 52).  Install seal (Item 27).  Lubricate inside of  seal  carrier  and  the  seal  with  Lubriplate  or transfer case oil. b. Fit  seal  carrier  onto  the  shift  shaft  and  into  the shift  opening  on  the  PTO  housing.    The  detent ball    opening    should    be    facing    in    the    same general   direction   as   the   indicator   light   switch hole.  Install the four bolts (Item 54), tightening to specifications. c. Put nut (Item 56) on eye (Item 57).  Install (Item 57)   onto   end   of   shift   shaft   (Item   53).      Install detent ball (Item 32), detent spring (Item 31) and set  screw  (Item  30).    Tighten  set  screw  until  it takes a force of 25-40 lbs.  to push the shift shaft out of detent. d. Position lever (Item 58) on eye (Item 57) with pin (Item   59)   washers   (Item   60)   and   cotter   pin installed  as  illustrated  on  the  oil  line  and  fitting illustration (Page PM15).  Install link (Item 55) as illustrated.    Check  shift  action  before  tightening lock nut (Item 56).  The eye should be adjusted as necessary to make the lever angles approximately even in the engaged and disengaged    positions.        Skip    section    J8    and proceed with step J9. -26-