expi ing a hole through which Tool J 8363 is inserted to e gage the spur wheel and thus turn the single adju ting screw fig 5 13 1 P s I Fig 5 13 Tuming Adjusting Screw Spur Wheel with Tool J 8363 Ad ustment Front or Rear 1 Jack all wheels clear of floor 2 On rear brakes loosen the check nut at the parking brake cable equalizer to remove tension from brake cable NOTE If cable has been adjusted too short the rear brake shoes will be forced away from the anchor pins in brake release position making correct shoe adjustment impossible Remove adjusting hole cover from brake flange plate Expand brake shoes by turning adjusting screw with Tool J 8363 until a heavy uniform drag is felt on the brake drum fig 5 14 NOTE Moving the outer end of tool upwards expands the shoes Turn adjusting screw back to retract brake shoes 12 notches on front brakes and 15 notches on rear This will provide adequate running clearance between shoes and drums f 7 Fig 5 14 Adjusting Brakes 5 Repeat operations 3 and 4 at each wheel and replace hole covers 6 After the hydraulic brakes are adjusted adjust the parking brakes as outlined under Parking Brake Adjustment PARKING BRAKE The service brake must be properly adjusted first as a base for the parking brake adjustment Adjustment 1 Jack up both rear wheels 2 Pull parking brake lever up 4 notches from fully released position 3 Loosen the forward check nut on the equalizer and tighten the rear one until a heavy drag is felt when rear wheels are rotated 4 Tighten check nuts securely 5 Fully release parking brake and rotate rear wheels no drag should be present Inspection If complete release of the parking brake is not obtained when release handle is pulled or if application effort is high check parking brake lever assembly for free operation If operation is sticky or a bind is experienced correct as follows 1 Clean and lubricate brake cables and pulleys NOTE These pulleys must be lubricated as outlined in Section 2 every 10 000 miles 2 Inspect brake lever assembly for straightness and alignment replace if necessary 3 Clean and lubricate parking brake lever assembly which must operate freely 4 Check condition and installation of return spring