S-SERIES INSTRUMENTS CABLE SERVICE Removal 1. Disconnect     upper end of speedometer or tachometer   cable   by   removing   four   mounting screws   from   instrument   cluster   and   detaching cluster enough to expose back of cluster. 2. Depress spring clasp on back of speedometer or tachometer and release cable (Figure 4). 3. Unscrew  cable  lower  or  drive  end  from  adapter at either transmission or engine component. 4. Unfasten cable from any ties or slips and remove complete cable assembly from chassis. Inspection 1.Pull the flexible core out of case. 2. Check for kinks by rolling core on a flat surface. A  core  kink  will  show  up  as  a  hop   at   kinked point. 3. Check  for  frayed  spots  by  running  core  loosely through fingers. Core Replacement Never reuse a kinked or frayed core.  A kinked core will cause    a    fluctuation    of    speedometer    or    tachometer reading and a frayed core will fail completely a short time after being returned to service. NOTE - When replacing core, be sure core Is not too long.    A  long  core  will  cause  a  damaging  thrust  to head of speedometer or tachometer when Installed. Installation Apply  a  thin  coat  of  lubricant  (IH  #251  H  EP)  to  core  at reassembly as follows: 1. Place  approximately  1  teaspoon  of  lube  in  one hand. 2. Feed  the  core  (lower  end  first)  through  the  lube and into casing. 3. Keep  last  four  inches  of  cable  free  of  lube  to prevent lube from entering the instrument head. 4. Install  complete  cable  assembly  in  chassis  and connect in reverse order of "Removal" procedure. IMPORTANT   -   Avoid   sharp   bends   when   installing speedometer    or    tachometer    cables.        Under    no circumstances should a casing have less than a  six inch   radius   bend.      Route   tachometer   cable   away from  compressor  discharge  line  and  strap  to  stay rod to avoid cable damage. SPEEDOMETER, TACHOMETER AND CABLE TROUBLESHOOTING GUIDE PROBLEM PROBABLE CAUSE SOLUTION Inoperative 1 Cable disconnected 1 Connect cable. 2 Broken core 2 Repair or replace. 3 Damaged speedometer or 3 Replace. tachometer. Indicator pointer fluctuates 1 Kinked core 1 Repair or replace. 2 Cable improperly routed 2 Route cable correctly. 3 Cable improperly installed in 3 Install cable correctly. speedometer or tachometer head. Noisy, clicking or squealing 1 Damaged or worn parts in 1 Replace. speedometer or tachometer. 2 Damaged core 2 Repair or replace. 3 Cable improperly routed 3 Route cable correctly. Reads incorrectly 1 Wrong adapter 1 Install correct adapter. 2 Cable improperly installed 2 Install cable correctly. 3 Speedometer or tachometer not 3 Replace. calibrated. CTS-4140Y  Page 7