6.5.(a).(iii): The correct linings are fitted.
6.5.(a).(iv): The linings are in good condition and bedding is completed.
6.5.(a).(v): The brake wheel is aligned and in good condition.
6.5.(b): Torque adjustment for Mondel MST/E brakes is adjustable on site. Tighten or loosen screw (B), see Fig. 2, to set the torque within the prescribed range shown on the scale. The torque setting is obtained by matching the top of the
6.6: Automatic Equalization Assembly
6.6.(a): The total available shoe clearance is determined by the active stroke of the actuator. Distribution of the resulting clearance is determined by two factors.
6.6.(a).(i): As the brake releases under power, the shoe nearest to the actuator has been biased to open first. This is done during manufacture by inclining the actuator away from the nearest shoe. (Fig. 2).
6.6.(a).(ii): Clearance provided to the nearest shoe is restricted by the (AE) mechanism located on the base. The clearance between the friction bolt and holes in the base, through which it passes, determines the “actuator side” shoe clearance.
6.6.(b): When the predetermined “actuator side” shoe clearance has been established, the remaining clearance is transferred to the
6.6.(c): As lining wear occurs, the friction bolt in the (AE) mechanism is dragged to a new location, to provide the reference point for the shoe clearance on the “actuator side” of the brake.
6.6.(d): The (AE) friction bolt mechanism is
6.6.(d).(i): Release the brake and, using a
6.6.(e): The actual clearance which will be allowed to the “actuator side” shoe is determined by the difference in diameter between the friction bolt shank and the holes in the links, through which it passes.
6.6.(f): The friction bolt assembly is
6.6.(g): Refer to Fig. 3a: Install friction bolt through Automatic Equalization arms and base. Add, onto the end of the friction bolt, a stack of three Belleville washers in series, (as indicated below), followed by a plain flat washer.
8/17/2006 | Page 18 of 33 | MST/E Electric Shoe Brakes Manual |
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