SERVICE MANUAL Fig. 19  Right Wheel Rotation (Arrow) Fig. 20  Left Wheel Rotation (Arrow) 1 Primary (Forward) Shoe 3 Cam 5 Organic Brake Block 2 Secondary (Reverse) Shoe 4 Semi-Metallic Brake Blockbrake group. brake group. Wagner Brake Group (Fig. 6) 1. Lubricate camshaft bushings prior to installing camshaft. Refer to LUBRICATION  section  Brakes  for  type  of lubricant. 2. Install    camshaft    assembly.        Make    sure spacer  washers  are  reassembled  in  same relative    position    from    which    they    were removed. 3. Assemble   the   brake   shoe   rollers   to   the shoes, if equipped with retainers. 4. Assemble  guide  pin  washers  and  position shoes over anchor pins and guide pins. 5. Assemble   anchor   pin   washers   and   guide pin washers. 6. Install  guide  pin  "C"  washers  and  anchor pin retainer rings. 7. Install brake shoe return springs. 8. Pull   each   shoe   back   and   insert   rollers. Installing  rollers  after  shoe  return springs are     installed     requires     less     effort     than installing   brake   shoe   return   springs   after the  rollers  are  in  place.    However,  if  the rollers have retainers they must be assembled to shoes as stated in step 3. 9. Reassemble   slack   adjusters   on   camshaft aligning scribe marks and positioning spacer washers in reverse sequence when adjuster was removed. a. Use    spacer    washers    to    provide    a maximum end play of 1.59 mn (.062") with adjuster 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. CTS-4080W - Page 13