SERVICE MANUAL 10. Reinstall slack adjuster retaining ring. 11. Reinstall   wheel   and   drum   assembly   and adjust wheel bearings. 12. Adjust   brakes   as   instructed   elsewhere   in this section. Brake Groups with Spiders Three   variations   will   be   found   in   brake   groups   with spiders. Eaton (Fig. 7) with fixed anchor pin and open end shoes. Rockwell  "P"  Series  (Fig.  8)  with  two  removable  anchor pins and closed ends on shoes. Rockwell "Q" Series (Fig. 12) with two removable anchor pins and open ends on shoes. 1. Lubricate  camshaft  bushings  with  lubricant listed in LUBRICATION section, Brakes. 2. Install camshaft assembly being sure spacer  washers  are  assembled  in  reverse sequence when removed. 3. Install anchor pins if removed (Rockwell "P" and "Q" Series brake groups). "P"   Series   -   Position   shoes   in   place   on spider then push the  pin  through  shoe  and into  spider.    Repeat  anchor  pin  installation on  remaining  shoe.    Install  felt  seals,  seal retainers   and   lock   rings   on   anchor   pins. Also     be     sure     return     spring     links     are positioned between shoe webs. It  is  important  that  anchor  pins  which  are secured  with  lock  bolts,  are  positioned  so that flats are aligned with bolt openings and tightened   bolts   to   85-120   N.m   (19-27   ft. lbs.).  Install lock wires. "Q"  Series  -  Anchor  pins  are  held  in  place by  the  shoes,  eliminating  snap  rings,  felts and set screws. 4. On   brake   groups   with   open   end   anchor ends  on  shoes,  position  shoes  on  anchors and install shoe retaining springs at anchor end of shoes. 5. Install brake shoe return springs. 6. Pry  each  shoe  (one  at  a  time)  away  from cam   and   install   rollers.      If   rollers   have retainers,  be  sure  they  are  hooked  on  the roller assemblies. 7. Reassemble   slack   adjusters   on   camshaft aligning    scribe    marks    and    repositioning spacer washers to the same location when removed. a. Spacer  washers  are  to  be  positioned to provide a maximum end pay of 1.59 mm (.062”) with retaining ring installed. b. Adjuster  screw  may  be  either  facing toward  or  away  from  brake  chamber mounting flange to provide accessibility.    In  most  instances,  the adjuster   screw   will   be   facing   away from brake chamber mounting surface. 8. Install  slack  adjuster  retaining  ring.    Make sure   that   the   retaining   ring   is   of   correct thickness.    Two  variations  of  ring  grooves will  be  found;  namely  1.5875  mm  (1/16”) and  3.1750  mm  (1/8”).    The  proper  ring thickness  must  be  used  in  the  camshaft groove. 9. Install brake chamber if removed. 10.    Reinstall   wheel   and   drum   assembly   and adjust wheel ring. 11.    Adjust    brakes    as    outlined    in    BRAKE ADJUSTMENT instructions. SERVICING FOUNDATION BRAKE COMPONENTS DRUM AND SHOES For  complete  details  covering  servicing  of  brake  drums and shoes, refer to the section covering RECONDITIONING DRUMS AND SHOES. Anchor Pins Anchor pins provide a point where shoes can be secured to  backing  plate  or  spider  and  also  permit  positioning shoe in respect to drum. Anchor pins are  designed  to  withstand  all  braking  force of slowing or stopping the vehicle. Anchor pins which are secured to the backing plate with a   lock   washer   and   nut   are   replaced   by   using   two wrenches; one wrench is positioned on the nut while the second  wrench  is  positioned  over  the  flats  on  threaded area  on  anchor  pin.    Refer  to  TORQUE  CHART  for specified torque value. If fixed anchor pins (Fig. 18) become worn, the complete spider replacement will be necessary. Anchor pins in spiders which are removable CTS-4080W - Page 14