Craftsman 139.53784 Owner's Instructions Manual

15. Pull the belt around the idler pulley and hook thetrolley connector into the retaining slot on the trolleyas shown in Figure 4. The dbbed side must contact_e pu/fay.16. With the trolley against the pliers, dispense theremainder of the belt along the rail assembly towardthe powerhead end around the sprocket. Thesprocket teeth must engage the belt.17. Check to make sure the belt is not twisted, thenconnect it to the fiat end of the trolley threaded shaftwith the master link, as shown:• Push pins of master link bar through holes in endof belt and trolley threaded shaft.• Push master link cap over pins and past pinnotches.• Slide clip-on spring over csp and onto pin notchesuntil both pins are securely locked in place.18. Insert the trolley threaded shaft through the hole inthe trolley. Be sure the be# is not lwisted, and thedbbed side faces the rail.19. Hold the belt at the trolley shaft as you thread thespring nut by hand (Figure 5) onto the shaft untilfinger tight against the trolley. Do not use any tools.20. Remove the locking pliers.21. Set the belt tension:• Insert a screwdriver tip into one of the nut dng slotssr_l brace It firmly agak_stthe trolley,as shown.- Place a 7/16' open end wrench on the square end.Rotate the nut about 1/4 turn untilthe spring releasesand ,snapsIhe nut ring against file _011ey,Figure 6.This sets the springto optimum belt tension.22. Replace the belt cap reta'mer and complete the re-installation and adjustment of your opener accordingtO your owner's manual.23. Replace the old emergency release rope with thenew, longer replacement rope.24. Reconnect power and operate the door in the UPdirection.25. Increase the UP travel limit by turning the UP limitadjustment screw in e _ direction as shovmon label. One turn equals 2" of travel.Master Unk CaId;er PulleyTrolleyThreadedShahHo/eF/gum 5F/guro 6TrdleySureNutRtng__..___ER RELEASE%1/4"Part No. Description163C158-11 ..... Header rail extensiOn ........ t1A5250-1 ....... 8' Belt Assembly ............ 126A53 ......... Rope ..................... 11A995 ......... Master llnk Kit ............. 11A5019 ........ Spring Nut Assembly ........ 1201999, Seam, Roebuck& Co,All RightsResewed114A2384 Pdntedin Mexico

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