INSTALLATION INSTALLING DRIVESHAFT Drive Shaft Assembly - Place in a pair of centers and check   the   shaft   for   runout   if   not   previously   done   during assembly.    The  runout  on  the  tube  should  not  be  more  than .38  mm  (.015")  indicator  reading,  and  on  the  neck  of  the  slip stub shaft the runout should not be more than .12 mm (.005") indicator  reading.    Mark  the  high  and  low  points  on  the  shaft with chalk and straighten if necessary.  Install with the slip joint nearest the  source  of  power.    Tighten  the  flange  bolts  evenly after the nuts and NEW lockwashers are in place. CHECKING DRIVESHAFT ANGLES The  procedure  to  check  driveshaft  angles  for  proper universal joint operating angles follows: 1. Remember to check driveshaft angles both with the tractor fifth wheel unloaded, and loaded with a trailer. 2. To   determine   driveshaft   angles,   a   spirit   level protractor  is  required  (Fig.    43).    When  angles are  read  from  the  0  deg.    Mark  (for  example, measuring    inter-axle    shaft    angle    -    5    deg.), record    and    use    the    angle    shown    on    the protractor.  When angles are read from either of the   90   deg.      Marks   (vertically)   for   example, measuring yoke angles, do not record the angle shown   on   the   protractor   since   the   90   deg. marks must be understood to be the same as 0 deg.  On the horizontal plane.  Thus, if a vertical reading is 85 deg., the angle being measured is 5 deg. 3. All  angles  should  be  read  within  1/4  deg.    (15 minutes) and they should be measured with the protractor held plumb on a clean, flat surface. 4. Inflate all tires to the pressure at which they are normally    operated.        Park    the    tractor    on    a surface which is as nearly level as possible both from front-to-rear and from side-to-side. 5. The   tractor   must   be   in   its   normal   operating position.    Do  not  attempt  to  level  the  truck  by jacking  up  the  front  or  rear  axles  to  obtain  a level condition. 6. Check and record the angle  on  the  engine  and main  transmission.    This  reading  can  be  taken at   the   rear   of   the   main   transmission   on   the output yoke or flange.  Record this reading on a sketch similar to Fig.  44 (Example on Fig.  45, - 1 deg.  down). Fig.  43 7. Move   protractor   to   the   0   deg.      reading   and check   driveshaft   angle   between   transmission and   forward   axle   (Example   4   deg.      30   sec. down). 8. Check front axle input yoke angle with protractor (Example   -   angle   up   2   deg.      30   sec.),   also check   front   axle   output   yoke   (Example   angle down 2 deg.  20 sec.). 9. Measure   the   angle   of   the   tandem   driveshaft between    the    front    axle    and    first    rear    axle (Example 5 deg.  down). 10. Measure the rear axle input yoke angle (Example 12 deg.  up). Fig.  44 See Page 23 for legend. CTS-4017 - Page 22 PRINTED IN UNITED STATES OF AMERICA