SERVICE MANUAL CALIBRATION Section 5 Figure 7.  Adjusting Hi-Idle Rack Position 1. Hi-Idle Stop Screw 2. Lock Nut a. Loosen  locknut  and  turn  hi-idle  stop  screw with  wrench  counterclockwise  to  decrease rack   dimension,   or   clockwise   to   increase rack dimension. b. Tighten locknut and recheck rack dimension. Governor Performance at No-Load (Hi-Idle) Check 16. Operate  test  stand,  with  control  lever  assembly positioned  as  specified,  at  specified  RPM  listed on   CALIBRATION   CHART   and   observe   rack position.        Rack    position    as    shown    on    dial indicator  should  be  as  specified  on  Calibration Chart. If specified rack position is unattainable, recheck governor cut-off (internal adjustment) and governor cut-off (external adjustment) calibrations. Governor End Regulation Check 17. Operate test stand at specified RPM with control lever assembly in full load position (fully forward) and observe rack position.  Rack position should be  0.1-1.0  mm  (.0039-.039").    If  specified  rack position is unattainable, recheck governor cut-off internal adjustment and governor external adjustment calibrations. Governor Lo-ldle Regulation Check NOTE:    Steps  18  and  19  are  not  independent  checks. One must not be achieved without the other. 18. Operate test stand at specified RPM with control lever assembly positioned as specified. If    rack    is    not    within    specified    limits,    make governor adjustments as follows: a. Remove    adjusting    nut    (count    clicks    to flush), spring seat and outer spring.  Add or remove    outer    spring    shims    to    achieve specified control rack position. b. To  increase  rack  position  shims  must   be added and to decrease rack position shims must  be  removed.    Add  or  remove  same shim pack on both sides. c. Install  outer  spring,   spring   seat,   adjusting nut,    preload    governor    springs    to    initial setting from flush position and recheck. d. If   specified   rack   position   still   cannot   be obtained   by   steps   a,   b   and   c,   recheck "slider    to    housing"    and    "S-plate"    basic dimensions (Section 4, Page 5). Lo-ldle Back-Up Check 19. Operate test stand at specified RPM with control lever positioned as specified. Decrease  test  stand  speed  to  100  RPM.    Rack position should be 9.0 mm (.354")  or  greater  as shown on dial indicator. If   rack   is   not   positioned   as   specified,   repeat Steps  3  on.    Bring  low  idle  stop  screw  up  to touch control lever (Figure 8). Step/No Step Check 20. Check    for    continuous    rack    movement    while increasing  speed  within  the  range  specified  on calibration  chart  (Step/No  Step  Check).    Rack should not stay in any one position for more than 25 RPM.  If rack is "sticky, " correct. CGES-375 Printed in United States of America Page 5