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DESCRIPTION - TM-5-4210-230-14P-1_262
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Straight Rearward Driving
TRUCK SERVICE MANUAL TM 5-4210-230-14&P-1 Driven Clutch Members Two     identical     driven     clutch     members     are located   on   either   side   of   the   spider   and   center   cam assembly.  Each has a set of clutch teeth to match the clutch teeth on the spider through which driving torque is transmitted.      Radially   inward   from   the   driven   clutch teeth  on  models  using  internal  spring  are  cams  which mesh with the cams of the center cam member. These cams  have  been  eliminated  on  the  models  using  the external  spring.    The  internal  diameter  of  each  driven clutch  member  has  splines  which  engage  the  external splines of the splined side members. Fig. 36  Typical Installation of NoSPIN Unit (Cross Sectional View) Spring Retainers and Springs Models with Internal Springs: Spring retainers are inserted into the outer ends of   driven   clutch   member.      The   bowl   side   of   these retainers  is  mounted  first  through  the  outer  side  of  the driven   clutch   members.      The   flanged   portion   of   the spring retainers pass through the internal splines to rest on  the  mating  flanges  of  the  driven  clutch  members. The    springs    are    mounted    in    spring    retainers    after assembly and thrust against their inner cupped ends. Models with External Springs: Spring  retainers  fit  over  the  side  gear,  passing through external splines to seat against the shoulder on the side gear.  Springs fit between the driven clutch and outer   flanged   surface   of   the   spring   retainer.   Splined Members  These  two  splined  side  members  are  splined internally  to  receive  the  truck  axle  shafts.    The  inner hubs  of  the  splined  side  members  are  inserted  in  the outer  ends  of  the  springs.    The  external  splines  of  the splined   side   rembers   engage   the   internal   splines   of driven  clutch  members  on  each  side  of  the  completed assembly. OPERATION Straight Forward Driving When   a   vehicle   is   being   driven   in   a   straight forward  direction,  the  clutch  teeth  on  both  sides  of  the spider assembly are fully engaged with the clutch teeth on   each   driven   clutch   member.      Likewise,   the   fixed cams  of  the  driven  clutch  members  are  fully  meshed with  the  cam  surfaces  of  the  floating  center  cam  ring mounted   on   the   inside   diameter   of   the   spider,   as described previously. Engagement   of   the   driving   and   driven   clutch teeth is assured by the pressure of the two springs which force  the  driven  clutch  members  inwardly  against  the spider and also by the positive locking action developed by   the   mating   undercuts   on   the   driving   faces   of   the clutch teeth, Fig.  37. In   this   condition,   both   clutches   remain   fully engaged  so  that  the  assembly  operates  as  a  solid  unit and   each   rear   wheel   is   driven   forward   at   ring   gear speed. CTS-2095S - Chapter II - Page 3 PRINTED IN UNITED STATES OF AMERICA

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