SERVICE MANUAL4.Lift brake shoes from anchor pins and guidepins.5.The brake shoe anchor may now be removed ifdesired, by removing nut and lock washer fromanchor pin; then force anchor pin from backingplate.6.Remove cam rollers from brake shoe if notpreviously done so.Vehicles with automatic slack adjusters, refer to thebrake manual section which applies to AutomaticSlack Adjusters.7.Mark position of manual slack adjuster in relationto camshaft and note position of adjusting screw.Adjusting screw may either be toward or awayfrom brake chamber mounting surface.8.Remove clevis pin connecting brake chamberpush rod to slack adjuster.9.Remove lock ring retaining slack adjuster to endof camshaft and remove slack adjuster fromcamshaft. Note location of spacer washers forreassembly purposes.10.Remove camshaft from camshaft bracket.Brake Groups with SpiderThree basic variations will be found in brake groupswhich use spiders.1.Eaton brake groups (Fig. 7) use a fixed anchorpin with open end shoes at anchor end.2.Rockwell "P" Series brake groups (Fig. 8) haveremovable anchor pins which utilize brake shoeswith closed anchor pin openings (holes).3.Rockwell "Q" Series brake groups (Fig. 10) haveremovable anchor pins with bushings and openend anchor location on brake shoes.Fig. 7 Typical Brake Group with Fixed Anchor Pins1Link5Return Spring8Anchor Pin, Fixed Type2Brake Chamber Bracket6Lining (Blocks)9Shoe Retaining Spring3Roller Assembly7Open Anchor Pin Hole10Spider4Camshaft AssemblyCTS-4080W - Page 7
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